Make yourself visible and let companies apply to you.
Role title
Roles
Processing Jobs in London
Trending Processing jobs in London
Get notified about new jobs that match this search?
Data Scientist - London, UK (Fully REMOTE)
Randstad Technologies Recruitment
London
Fully remote
Mid - Senior
£599/day - £699/day
RECENTLY POSTED
+4

Role: Data Scientist Type: Contracts (6 Months) Location: London, UK (REMOTE) Working Model: Fully Remote Payrate: (Apply online only) GBP/day on PAYE (Apply online only) GBP/day on RUPAYE (Apply online only) GBP/day on Inside IR35 on Umbrella The Role: Join our team to drive data quality and empower cross-functional decision-making by building robust pipelines and self-serve data products. You will be essential in defining metrics for platform health, developer productivity, and ML/AI adoption. What You Will Do: Own end-to-end analytical data modeling in BigQuery using dbt. Build reliable data pipelines utilizing SQL, Python, and distributed processing frameworks (Apache Spark, Scio, Beam, or Flink). Develop clear, story-driven dashboards using tools like Looker or Tableau. Champion data quality, implement CI/CD for dbt models, and mentor junior team members.What You Bring: 5+ years of experience in analytics or data engineering, with deep expertise in SQL. Extensive experience with dbt, a cloud data warehouse, and workflow orchestrators (Airflow, Dagster, Prefect, or Flyte). Proficiency in Python for data analysis and automation. Bonus: Experience with experimentation, ML/AI metrics, or platform productivity.This is an urgent vacancy with a deadline where the hiring manager is shortlisting for an interview immediately. Please apply with a copy of your CV or send it praveen. sukkala2 @ randstaddigital. Com Randstad Technologies is acting as an Employment Business in relation to this vacancy

Python Risk Developer - Contract - Shell Scripting, Pandas, Polars, AWS, SQL, indices
Scope AT Limited
London
Remote or hybrid
Mid - Senior
Private salary
RECENTLY POSTED
+3

Our Hedge Fund client is looking for a Python Developer on a 6 month initial contract on their Risk Tech Team.

Key Responsibilities

  • Design and implement high-performance index calculation engines and analytics frameworks using Python
  • Build and optimize data pipelines for large-scale financial data processing
  • Architect and deploy microservices on AWS cloud infrastructure
  • Ensure code quality through testing, version control, and documentation
  • Participate in code reviews and technical design discussions

Required Qualifications

  • Strong proficiency in data analysis using Pandas/Polars
  • Demonstrated experience with equity index products and performance benchmarking
  • Expertise in building RESTful APIs and microservices
  • Strong SQL skills and experience with database design/optimization
  • Proficient in Git-based version control and CI/CD practices
  • Solid understanding of Linux/Unix environments

Preferred Qualifications

  • Experience with AWS services (EC2, S3, Aurora, Lambda)
  • Knowledge of financial markets and investment products
  • Experience with Real Time data processing and streaming architectures
  • Familiarity with performance optimization and profiling tools
  • Experience with Docker and container orchestration

Technical Skills

  • Languages: Python, SQL, C#, Shell Scripting
  • Frameworks: FastAPI/Flask, Pandas, Polars
  • Cloud: AWS ecosystem
  • Tools: Git, Docker, Jenkins/GitHub Actions

By applying to this job you are sending us your CV, which may contain personal information. Please refer to our Privacy Notice to understand how we process this information. In short, in order to supply you with work finding services, we will hold and process your personal data, and only with your express permission we will share this personal data with a client (or a third party working on behalf of the client) by email or by upload to the Client/third parties vendor management system. By giving us permission to send your CV to a client, this constitutes permission to share the personal data that would be necessary to consider your application, interview you (Phone/video/face to face) and if successful hire you.

Scope AT acts as an employment agency for Permanent Recruitment and an employment business for the supply of temporary workers. By applying for this job you accept the Terms and Conditions, Data Protection Policy, Privacy Notice and Disclaimers which can be found at our website.

Senior Golang Developer - Kubernetes - Financial Services
Rothstein Recruitment Ltd
London
In office
Senior
£120,000 - £160,000
RECENTLY POSTED
+11

Excellent opportunity opens for an experienced Developer strong on Golang with experience in AWS and Kubernetes to join a highly regarded Financial Services entity’s London office. You will act as the team lead and play a key role in building mission-critical financial applications that power trading, investment, and risk management systems across the firm.

If you are passionate about working in a dynamic, fast-paced environment and are eager to apply your technical expertise to the financial services industry, this is the role for you.

Key Responsibilities:

  • Design, develop, and maintain high-performance Back End services using GoLang to support financial applications and services, including trading platforms, investment systems, and risk management tools.
  • Build and deploy cloud-based solutions using Amazon Web Services (AWS), including services such as EC2, S3, RDS, DynamoDB, and Lambda to create scalable, reliable, and secure infrastructure.
  • Implement and manage containerized applications using Kubernetes, ensuring seamless orchestration, scaling, and resilience in a cloud environment.
  • Write clean, efficient, and well-documented code while following best practices for financial systems development, focusing on performance and security.
  • Collaborate with other development teams, business analysts, and stakeholders to define and refine requirements, and ensure that applications meet financial regulatory standards and business needs.
  • Optimize the performance of Back End services, ensuring low-latency responses and high availability, critical for financial services.
  • Implement CI/CD pipelines, automated testing, and monitoring systems to ensure the reliability and stability of production systems.
  • Proactively identify issues and bottlenecks in existing systems and propose solutions to improve the system’s performance and scalability.
  • Stay updated with new tools, technologies, and industry trends in cloud computing, containerization, and financial systems to continuously improve development practices and outcomes.

Ideal Skills:

  • Proven experience (2+ years) in GoLang Back End development, with a strong focus on performance optimization and building scalable systems for high-volume, high-frequency financial applications.
  • Strong experience working with Amazon Web Services (AWS), including EC2, S3, RDS, DynamoDB, Lambda, and other cloud-native technologies.
  • Hands-on experience with Kubernetes for deploying, managing, and scaling containerized applications in a cloud environment.
  • Solid understanding of financial systems and services, particularly in areas such as trading platforms, investment management, and risk analytics.
  • Experience in building microservices architectures and working with APIs (RESTful, gRPC, etc.) to integrate various systems.
  • Strong knowledge of containerization (Docker) and continuous integration/deployment (CI/CD) practices.
  • Experience with database systems (relational and NoSQL) and working with financial data.
  • Familiarity with DevOps practices and tools to streamline the development life cycle, such as infrastructure-as-code (eg, Terraform or CloudFormation).
  • Ability to troubleshoot and resolve issues in production environments, ensuring uptime and performance in high-pressure, mission-critical scenarios.
  • Excellent communication skills to collaborate effectively with cross-functional teams and stakeholders in a fast-paced financial environment.
  • Experience with serverless computing (AWS Lambda, etc.) to create efficient and scalable solutions.
  • Knowledge of financial industry regulations and standards, particularly around data security and privacy.
  • Familiarity with event-driven architectures or message queues (eg, Kafka, RabbitMQ) for Real Time data processing.
  • Experience with automated testing frameworks and continuous delivery tools like Jenkins, GitLab CI, or CircleCI.
  • Understanding of performance monitoring and observability tools such as CloudWatch, Prometheus, or Datadog.

Interested? Please Apply!

Golang Go AWS Kubernetes Terraform Bank Banking Finance Financial Services Crypto Blockchain Web3 Trading Exchange Digital Assets Hybrid Flexible Developer Software Engineer Backend Developer Golang Engineer Kafka Apache Kafka RabbitMQ AWS Lambda Cloud Platform

Team Lead - Quant Development- Leading Global Hedge Fund
Oxford Knight
London
In office
Senior
Private salary
RECENTLY POSTED

My client, one of the world’s leading hedge funds, is in search of an experienced Quantitative Developer to join them in a team-lead capacity. This role requires technical and managerial skills with an emphasis on hands-on work. This leader would set technical direction and provide guidance to a small team of Quantitative Developers. The ideal candidate is passionate about designing, architecting, and implementing low-latency C++ systems that are not only robust, resilient, and accurate, but also exceptionally fast. This team works directly with the firm’s central trading teams, and by leading the construction and maintenance of this high-performance infrastructure, this Team Lead will enable new trading opportunities across businesses and regions, ensuring the best possible execution performance.

Job Duties

  • Lead, mentor, and manage a team of quantitative developers, fostering a collaborative and high-performance culture.
  • Development of execution algorithms, order management systems, strategy containers, connectivity, and messaging systems.
  • Work directly with central trading teams to optimize the firm’s overall execution performance.
  • Enhance the platform’s efficiency by utilizing network and systems programming, along with other advanced techniques to reduce latency.
  • Create systems, interfaces, and tools for historical market data and trading simulations to boost research productivity and system testability.
  • Assist in building and maintaining automated tests, performance benchmark framework, and other tools.
  • Collaborate closely with trading teams to gather requirements and develop solutions in a fast-paced environment.

Qualifications

  • Bachelor’s degree or higher in Computer Science, Engineering, or a related quantitative field.
  • 12+ years of cumulative professional experience in software development.
  • 7+ years of professional experience in a front-office, financial services environment, with a proven track record as a senior contributor or technical lead.
  • Strong background in data structures, algorithms, and object-oriented programming in C++, including:
    • Proficiency with new features of C++17 and C++20
    • Proficiency with multithreading and asynchronous environments
  • Strong understanding of low-latency and real-time system design and implementation.
  • Strong understanding of Linux system internals and networking.
  • Strong financial experience across multiple asset classes, with a focus on real-time low-latency trading systems for equities and futures.
  • Familiarity with python for quantitative research and data-oriented processing.
  • Familiarity with analysis of execution algorithm performance.

Whilst we carefully review all applications, to all jobs, due to the high volume of applications we receive it is not possible to respond to those who have not been successful.

Contact
If this sounds like you, or you’d like more information, please get in touch:

George Hutchinson-Binks
george.hutchinson-binks@oxfordknight.co.uk
(+44) 07885 545220
linkedin.com/in/george-hutchinson-binks-a62a69252

Senior Data Engineer- Global Quant Firm
Oxford Knight
London
In office
Senior
£200,000
RECENTLY POSTED

Salary: up to £200k + bonus

Summary

Leading global quant firm is looking for a pragmatic data engineer with experience of ETL/ELT pipelines to join the Vendor Data Group. Despite serving as the hub for managing the substantial operations across the UK, Europe and the Middle East, the London office retains a lively, positive environment of a start-up with the stability of a longer-established player.

You will be joining a very dynamic environment offering exposure to all aspects of the firm, as you collaborate with one of the trading teams to build and maintain mission-critical data integration pipelines and associated tools for alternative commodity and macro data. You’ll develop scalable data architectures and enhance data processing while optimizing workflows.

Here, technology is viewed as crucial to their continued success. The successful Senior Data Engineer will be passionate about data accuracy, and able to solve difficult technical problems in a real-time environment.

Requirements

  • At least 3+ years’ experience as a Data Engineer
  • Proficient in Python development, Devops, and Linux environments
  • Expert-level experience in data pipeline development, specifically ETL/ELT pipelines
  • Familiarity with data analytics tools and libraries, e.g. Pandas and NumPy

Preferred

  • Commodities and Macro alternative/fundamental data experience
  • Skilled with relational and non-relational database management

NB: Please don’t apply if you’re a fresh graduate.

Benefits

  • Competitive base salary & bonus
  • Enormous opportunity to grow, learn and have a significant business impact
  • Contributions are rewarded; career progression supported
  • Substantial benefits package, including private medical, paid parental leave, group life assurance & parking/cycle schemes

Whilst we carefully review all applications, to all jobs, due to the high volume of applications we receive it is not possible to respond to those who have not been successful.

Contact
If this sounds like you, or you’d like to know more, please get in touch:

Andy Stirling-Martin
andy@oxfordknight.co.uk
020 3137 9579
linkedin.com/in/andrew-stirling-martin-7664a946

Data Engineering Tech Lead- Leading Quant-Driven Market-Maker
Oxford Knight
London
Hybrid
Senior - Leader
£200,000
RECENTLY POSTED

Salary: up to £200k base + bonus

Summary

Fantastic opportunity for an experienced engineer to lead a brand-new data engineering team at this tech-savvy algorithmic trading firm. A very hands-on tech lead, you’ll be building a new system for processing and managing daily data that is used company-wide (including corporate actions, fundamentals, and index membership data).

Your focus will be collating the data most critical to the business, now and in the future, to ensure there is a singular, clean, easy-to-access & well-integrated data repository. As the owner of the firm’s daily data, you will be expected to anticipate the business’s needs so that the normalised data schema is minimal yet sufficient.

This firm uses Go for much of their software - prior Go experience is not necessary (but you must be be willing to learn and integrate with the existing software stack as necessary).

Requirements

  • Several years of experience working with financial data; knowledge of the subtleties of corporate actions will be crucial
  • Strong and confident programmer in Java, C++, Go, or other statically typed language.
  • Solid understanding of data analysis and statistics required to ensure sufficiently clean data, and some knowledge of statistics/basic ML would be highly beneficial

NB: Please don’t apply if you are a fresh graduate.

Benefits

  • Generous compensation package - you are making a direct impact on the PnL
  • Flat hierarchy, focus on teamwork, where people are rewarded on merit and excellence
  • Outstanding benefits, including onsite gym/sauna/fitness classes, extensive medical cover, and excellent professional development opportunities
  • Autonomy to work in the manner and using the software & hardware that you see fit

Whilst we carefully review all applications, to all jobs, due to the high volume of applications we receive it is not possible to respond to those who have not been successful.

Contact
If this sounds like you or you’d like to know more, please get in touch:

Andy Stirling-Martin
andy@oxfordknight.co.uk
020 3137 9579
linkedin.com/in/andrew-stirling-martin-7664a946

Product Developer
Cavendish Maine
London
Hybrid
Mid
£50,000
RECENTLY POSTED

Our client is a successful and consistently growing business within the health & beauty, personal care and gift sectors, supplying both independent and major retailers, globally, with their fantastic range of products. With an impressive growth strategy in place, this is an incredibly exciting time to join this fast paced, dynamic and energetic business. The role: Due to continued growth, they are seeking a new Product Developer to work alongside their creative Product Development team across a number of well-respected brands and categories. As a Product Developer you will be at the forefront of bringing the latest innovations to the companys customers, working closely with suppliers and internal teams to develop and launch new products with leading retailers such as Sainsburys, Morrisons, New Look, Primark, TKMaxx and more. You will be joining the business at an exciting time - having grown year on year for the past several years, this role offers huge opportunity to contribute to the business continued growth and expansion. Salary:upto £50,000 (DOE) + Bonus The person: The ideal candidate will have a passion for the beauty industry with previous experience in a product development role within the health & beauty sector (ideally within wet line products: skin, hair or body care and particularly for discount/off price retailers). You will be detail oriented, commercially focussed with demonstratable experience of costing and negotiation tactics and thrive in a fast-paced environment. This is a great role for a team player with a positive, can-do attitude who is passionate about innovation and staying ahead of trends. You will have a keen interest in the beauty and gifting sector with an eye on new opportunities and exciting industry updates. You should live within a commutable distance to central London, to be in the office 3 days per week. Contact: Consultant: Rina Gokani Reference: RG/102701 Tel: 01275 813027 Candidate care: By responding to this advert you consent to Cavendish Maine processing the personal data included within this application. If your application is successful we will contact you to discuss the opportunity in more detail, within 48 hours of receiving your application. Should you not hear from us within 3 working days please assume your application has been unsuccessful on this occasion. Please be advised that if unsuccessful for this role we may keep your details in our hold file, during which time you may be contacted for other suitable vacancies. If you do not want us to do this please call us to advise. In the meantime, we would like to thank you for your interest in Cavendish Maine.

Software Engineer, PB Core - London- Global Prime Brokerage & Financing Platform
Oxford Knight
London
In office
Mid - Senior
Private salary

Summary

Exciting opportunity at one of the fastest growing financial services firms around the world. They offer prime brokerage, clearing and financing across traditional and digital assets, and are now looking to hire world-class software engineers to help build on their success.

This is a pivotal role, where your primary focus will be building the firm’s real-time event processing system (i.e. clearing sub-ledger). This will involve designing, developing and maintaining the core infrastructure & systems for the prime brokerage platform, including trade execution, position management, risk monitoring, and reporting modules.

Responsibilities

  • Build robust systems for managing the entire trade lifecycle, from order routing & execution to settlement & reconciliation.
  • Identify performance bottlenecks and optimize system components for maximum throughput, low latency, and high reliability.
  • Draw on your knowledge and experience to support your team in making diligent & sound architectural decisions, upholding the highest bar for quality.

Requirements

  • 8+ years’ in software development/engineering experience
  • Strong programming skills in Java, C++, or Python
  • Familiarity with industry-standard technologies and protocols, e.g. FIX protocol, market data feeds, OMS
  • Experience with distributed systems and high-throughput services
  • Background in real-time transaction processing within trading, risk management, or web2.0 companies (large-scale transaction/event-processing systems: trading systems, risk management systems, pricing systems)
  • Driven self-starter with a strong sense of ownership coupled with effective collaboration and leadership
  • Excellent communication skills, plus ability to develop relationships with stakeholders across the firm
  • Solid financial services experience
  • B.S. degree or above in Computer Science, Engineering, Finance, or related field.

Nice to Have

  • Experience at a fast-paced, high-growth-stage company
  • Digital assets experience

Whilst we carefully review all applications, to all jobs, due to the high volume of applications we receive it is not possible to respond to those who have not been successful.

Contact
If you feel you are suitable for this role, drop me an email or give me a call:

Jack Peck
[e] jack.peck@oxfordknight.co.uk
[t] +44 20 3745 6537
linkedin.com/in/jack-peck-448a70131

Lead Java Developer - FX Options Realtime Risk - Citi
Citi
London
Hybrid
Senior
Private salary

Discover your future at Citi
Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview
Lead Java Developer - FX Options Realtime Risk
Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.

Description
This position is responsible for leading a team working on our FX real-time risk system, driving key deliverables, managing the backlog of work, and contributing technically where needed. As a front-office facing role, you’ll be the first point of contact for the FX Options Trading desk, providing quick and decisive action on technical delivery and incident resolution.

Responsibilities
Leadership & Delivery

  • Lead and mentor a high-performing team working on critical FX real-time risk infrastructure.

  • Drive key deliverables and manage the backlog in collaboration with business stakeholders

  • Serve as the primary technical point of contact for FX Options Trading leadership and make technical decisions, providing architectural direction as we modernize and onboard to the bank’s strategic risk platform

  • Contribute hands-on using our tech stack: Java, CouchbaseDB, Kafka, Apache Storm. Design and implement solutions for complex real-time risk calculation requirements

  • Act as SME to senior stakeholders including the trading desk and risk managers. Appropriately assess risk when business decisions are made, safeguarding Citigroup, its clients and assets

Required Experience

  • Extensive experience in application development and systems analysis

  • Proven financial knowledge of FX trading and risk systems is essential

  • Proven experience leading and mentor a high-performing team working on critical FX real-time risk infrastructure and managing successful project deliveries

  • Strong hands-on expertise in Java, especially in the context of distributed systems and real-time data processing

  • Excellent communication skills with ability to interact confidently with trading desk heads

Bonus points for

  • CouchbaseDB, Kafka, Apache Storm, Spring, OpenShift, GCP
  • Understanding of AI/analytics applications in financial systems

What Makes This Role Special
Outstanding Team Culture - Join a collaborative, supportive team with a fantastic culture that values innovation and mutual growth.
Deep Business Learning - Unique opportunity to learn the FX trading business inside and out, working directly with senior traders.
Technical Leadership - Provide technical direction on a critical system while working with modern technologies and AI/analytics innovations.
Career Growth - Exposure to strategic platform modernization, cloud technologies, and direct business leadership interaction.

Education
Bachelor’s degree/University degree or equivalent experience in a similar role

What we’ll provide you
By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:

  • 27 days annual leave (plus bank holidays)
  • A discretional annual performance related bonus
  • Private Medical Care & Life Insurance
  • Employee Assistance Program
  • Pension Plan
  • Paid Parental Leave
  • Special discounts for employees, family, and friends
  • Access to an array of learning and development resources

Visit our About Us | Culture, Values & Benefits page to learn more.

Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.


Job Family Group:
Technology ------------------------------------------------------
Job Family:
Applications Development ------------------------------------------------------
Time Type:
Full time ------------------------------------------------------
Most Relevant Skills
Please see the requirements listed above.------------------------------------------------------
Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------
Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi .

View Citi’s EEO Policy Statement and the Know Your Rights poster.

Commodities Technical - Application Support Analyst - Vice President - Citi
Citi
London
Hybrid
Mid - Senior
Private salary
+1

Discover your future at Citi
Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact.

Job Overview
Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.

We are seeking a highly motivated and experienced Senior Technical Application Support Specialist to join our global dynamic team. The successful candidate will be responsible for providing L2/L3 technical support for our commodities trading platform, with a primary focus on the Openlink and Risk Management applications. This role requires a deep understanding of the commodities asset class, exceptional technical troubleshooting skills, and a commitment to providing excellent customer service to our trading and business users.

What will you do:

  • Provide timely and effective L2/L3 technical support for the commodities trading platform, including the Openlink application and its ecosystem.
  • Investigate, diagnose, and resolve complex application and system issues, ensuring minimal disruption to business operations.
  • Systems will include market data, static data, trade lifecycle(openlink) and risk management platforms.
  • Monitor system health and performance, proactively identifying and addressing potential issues before they impact users.
  • Support global critical front office risk batches and End of day batch processing.
  • Collaborate closely with traders, business analysts, developers, and infrastructure teams to resolve incidents and implement solutions.
  • Manage the incident lifecycle, from initial report to resolution, including root cause analysis and post-mortem reviews.
  • Participate in a rotational on-call schedule to weekend support and bank holiday coverage.
  • Develop and maintain comprehensive support documentation, including knowledge base articles and runbooks.
  • Assist with the planning and execution of application deployments, upgrades, and disaster recovery tests.
  • Identify opportunities for process improvements and automation to enhance system stability and support efficiency.

Key Skills and Experience required:

  • A key requirement for this role is proven, experience with the Openlink application.

  • Strong functional knowledge of the commodities asset class, including physical and financial products (e.g., oil, natural gas, power, metals, agriculture).

  • A strong understanding of risk and pnl and supporting Risk management platforms.

  • Proficiency in SQL and experience working with relational databases such as Oracle or SQL Server.

  • Proficiency in Middleware technologies such as Solace.

  • Demonstrable scripting skills in languages such as Python, Juniper Notebooks, or shell scripting for automation and troubleshooting.

  • Excellent analytical, problem-solving, and critical-thinking skills.

  • Strong verbal and written communication skills, with the ability to articulate technical issues to both technical and non-technical audiences.

  • Ability to perform effectively in a high-pressure, fast-paced trading environment.

  • Experience with enterprise monitoring tools like ITRS Geneos, Splunk, Grafana, or similar.

  • Familiarity with the ITIL framework and best practices for incident, problem, and change management.

  • Previous experience working directly with traders and front-office staff.

What we’ll provide you:

By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:

  • 27 days annual leave (plus bank holidays)
  • A discretional annual performance related bonus
  • Private Medical Care & Life Insurance
  • Employee Assistance Program
  • Pension Plan
  • Paid Parental Leave
  • Special discounts for employees, family, and friends
  • Access to an array of learning and development resources

Visit our About Us | Culture, Values & Benefits page to learn more.

Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.


Job Family Group:
Technology ------------------------------------------------------
Job Family:
Applications Support ------------------------------------------------------
Time Type:
Full time ------------------------------------------------------
Most Relevant Skills
Please see the requirements listed above.------------------------------------------------------
Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------
Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi .

View Citi’s EEO Policy Statement and the Know Your Rights poster.

Senior Java Engineer - London Stock Exchange Group
London Stock Exchange Group
London
Remote or hybrid
Senior
Private salary
+5

Senior Java Developer

Business Unit: FTSE Russell - Index Platform
Company: London Stock Exchange Group (LSEG)

About Us

LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services - and our open-access model - we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.

LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ 25,000 people globally, more than half located in Asia Pacific. LSEG’s ticker symbol is LSEG.

Our People

People are at the heart of what we do and drive the success of our business. Our culture of connecting, creating opportunity and delivering excellence shape how we think, how we do things and how we help our people fulfil their potential. We embrace diversity and actively seek to attract individuals with unique backgrounds and perspectives. We break down barriers and encourage teamwork, enabling innovation and rapid development of solutions that make a difference. Our workplace generates an enriching and rewarding experience for our people and customers alike. Our vision is to build an inclusive culture in which everyone feels encouraged to fulfil their potential.

We know that real personal growth cannot be achieved by simply climbing a career ladder - which is why we encourage and enable a wealth of avenues and interesting opportunities for everyone to broaden and deepen their skills and expertise. As a global organisation spanning 70 countries and one rooted in a culture of growth, opportunity, diversity and innovation, LSEG is a place where everyone can grow, develop and fulfil your potential with meaningful careers.

About the Role

We are seeking a highly skilled and hands-on Senior Java Engineer with AI proficiency to help build the next generation FTSE Russell Index Platform. This platform underpins the calculation and distribution of FTSE Russell’s global family of indexes and requires advanced engineering, high precision data processing, and deep collaboration across global teams.

This is a deeply technical role focused on designing, building, integrating, and operationalising modern software and AI driven capabilities across internal platforms and client facing products. You will work with innovative technologies, contribute to complex algorithmic design, and drive engineering excellence in a high performance, data intensive environment.

Key Responsibilities

Core Engineering & Platform Delivery

  • Design, develop, and maintain complex Java and Python applications using modern engineering practices. Build / embed AI powered features into mission critical systems.

  • Architect and enhance services that support largescale, performance critical index computations.

  • Collaborate with Product Managers, UX, and engineering teams globally to deliver high quality products.

  • Lead projects end-to-end through requirements, design, development, testing, deployment, and operations.

  • Build and maintain automated test suites to ensure performance, scalability, and security.

  • Diagnose production issues, identify root causes, and deliver Level 3 support and fixes.

  • Conduct peer reviews, provide technical leadership, and mentor junior engineers.

Required Experience & Skills

  • 10+ years of hands-on backend software engineering experience.
  • Support the organisation’s AI adoption journey. Develop and enhance intelligent solutions using LLMs, LangChain/LangGraph, and agentic AI frameworks.
  • Establish engineering best practices for safe, scalable, traceable and production ready AI deployments across internal platforms and external product suites.
  • Strong algorithms, data structures, problem solving skills, and ability to translate business problems into scalable solutions.
  • Good command of coding standards and Strong understanding of both high level and low level software design
  • Expertise in:
    • Core Java, Python
    • Building highly distributed, data intensive systems
    • Microservices, REST APIs
    • RDBMS (Oracle/SQL Server/Postgres)
    • CI/CD tools (Jenkins/GitLab), DevOps automation
    • Docker, Kubernetes
    • JVM profiling & performance optimisation
  • Prior exposure to Level 3 production support.

Preferred / Nice-to-Have Skills

  • Experience leading or mentoring a team of engineers.
  • Experience within financial services or with financial market data.
  • Familiarity with in-memory caching, Spring Boot, Redis, Kafka.
  • Experience with BDD frameworks such as Cucumber, JBehave, or Karate.
  • Background as a Scrum Master or experience running Agile teams.

What We’re Looking For

A proactive, creative engineering leader who enjoys solving complex problems, working hands-on with modern technologies, and driving AI enabled innovation. If you’re passionate about building resilient, intelligent, data intensive systems that power global financial markets, we’d love to hear from you.

Career Stage:
Manager

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you’re ready to take your career to the next level and make a significant impact, we’d love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject .

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

IT Analyst, EMEA, IT - CITIC CLSA
CITIC CLSA
London
Hybrid
Mid
Private salary

Position Description

This position is responsible for providing frontline end user technology support and implementing IT projects to the office in London and other European locations. This role will also support IT infrastructure engineering activities coordinated by functions groups in Asia headquarter.

Key Areas of Responsibilities

  • Adhere to FCA regulations and CLSA’s Code of Conduct at all times.
  • Required to comply with company procedures regarding personal account trading, processing client complaints, and gifts and inducement policy, and other relevant global or local policies
  • Follow local guidelines on logging, tracking, updating, and escalation support calls as well as managing issue to final resolution.
  • Follow local guidelines for morning checks when on morning shift-rotation.
  • Provide front-line end-user support on PC/laptops hardware and software including Microsoft productivity suite, in-house applications, and cloud applications.
  • Facilitate support for Bloomberg, WIND, and other market data applications
  • Assist in trading floor moves, add, and changes
  • Provide front-line support to voice, video conferencing and telecoms systems.
  • Liaise closely with IT colleagues in other regions to ensure consistency with global policies, standards, and initiatives.
  • Implement and/or coordinate IT projects
  • Provide support for remote users on VPN
  • Ability to work flexible hours and varying shifts, including weekends and out of hours when called upon
  • Assist end users with their AI needs

Requirements

  • Bachelor’s degree (not necessarily IT related)
  • CompTIA A+ (preferred)
  • Minimum 3 years of relevant experience supporting trading floors with good experience supporting Bloomberg Terminals and/or other trading applications
  • Advanced technical skills supporting Microsoft Office suite of applications, PC/laptops and mobile devices
  • Good knowledge of LAN networking and video conferencing software: Zoom, Teams
  • Demonstrated familiarity with Desktop operating system, office automation and general infrastructure
  • Excellent command of spoken and written English
  • Strong customer service focus and interpersonal skills
  • Good team player of the working team for UK and European offices
AutoRek Developer - M&G plc.
M&G plc.
Multiple locations
Remote or hybrid
Mid - Senior
Private salary

Our purpose is to give everyone real confidence to put their money to work. With a heritage dating back more than 175 years, we have a long history of innovation in savings and investments, combining asset management and insurance expertise to offer a wide range of solutions.

Our two distinct operating segments, Asset Management and Life, work together to provide access to balanced, long-term investment and savings solutions.

Through telling it like it is, owning it now, and moving it forward together with care and integrity; we are creating an exceptional place to work for exceptional talent.

We will consider flexible working arrangements for any of our roles and also offer work place accommodations to ensure you have what you need to effectively deliver in your role.

We are seeking an experienced AutoRek Developer to support our Finance and Operations functions within a regulated UK Financial Services environment. The successful candidate will develop, optimise and support automated reconciliations, financial controls, and data processing workflows using the AutoRek platform.

Key Responsibilities

  • Design, configure and maintain end-to-end reconciliations and workflows within AutoRek.
  • Develop automated data ingestion, transformation rules, match logic and exception workflows.
  • Ensure reconciliations support regulatory standards including FCA, PRA, CASS and IFRS requirements.
  • Deliver platform enhancements working with Finance, Operations, Risk and Technology teams.
  • Create documentation for functional and technical specifications.
  • Support UAT, troubleshooting, platform upgrades and ongoing BAU activity.

Essential Skills & Experience

  • Hands-on AutoRek development experience (Modules 1-5 desirable).
  • Strong understanding of reconciliation processes used across banking, insurance or investment sectors.
  • SQL proficiency and experience with financial data transformation.
  • Ability to interpret accounting flows, ledger structures and operational controls.
  • Experience working in regulated UK Financial Services environments.

Desirable Skills

  • Experience integrating AutoRek with GL/ERP systems such as SAP, Oracle, Sun or Workday.
  • Knowledge of CASS reconciliations, prudential reporting, and risk/control frameworks.
  • Familiarity with ETL tools, APIs, and SFTP file transfer processes.
  • Understanding of Power BI or similar reporting tools.

What we offer:

At M&G, we’re committed to helping you thrive and supporting your wellbeing, both at work and beyond. Our benefits are designed to help you balance your professional and personal life, while planning confidently for your future. Our UK benefits include:

  • As a savings and Investments firm we are proud to offer a valuable pension scheme of 18% , with 13% made up of Employer Contributions and 5% Employee Contributions . We also offer Share Save and our Share Incentive Plan , together with access to financial wellbeing and support services - to help give you real confidence to put your money to work.
  • Enjoy 38 days annual leave including bank holidays, with the opportunity to purchase up to 5 extra days and additional flexibility through our Time Off When You Need It policy - to balance your work and personal commitments.
  • Our market leading Inspiring Families policy includes comprehensive support and paid parental leave covering maternity, adoption, surrogacy, and paternity leave - as supporting families is a core aspect of our inclusive culture.
  • Health & Protection cover including Private Healthcare , Critical Illness cover and Life Assurance for you, with family options - for peace of mind.

To explore more about life at M&G and our full benefits offering, visit Life at M&G

We have a diverse workforce and an inclusive culture at M&G, underpinned by our policies and our employee-led networks who provide networking opportunities, advice and support for the diverse communities our colleagues represent. Regardless of gender, ethnicity, age, sexual orientation, nationality, disability or long term condition, we are looking to attract, promote and retain exceptional people. We also welcome those who take part in military service and those returning from career breaks.

M&G is also proud to be a Disability Confident Leader , and we welcome applications from candidates with long-term health conditions, disabilities, or neuro-divergent conditions.

If you need assistance or an alternative means of applying for a role due to a disability or additional need, please let us know by contacting us at: careers@mandg.com

Senior Data Engineer
McCabe & Barton
London
Hybrid
Senior
£650/day
+1

Senior Software Engineer – Data Engineering

Contract duration:- 6 months initially (with extension available for the right person)

Location:- London EC4

Hybrid working:3 days per week in office + 2 days WFH

Rate: £650 inside IR35

Join our Data Engineering team at the heart of a quantitative investment firm, powering the infrastructure which drives our systematic trading strategies and cutting-edge discretionary research. You’ll help architect a multi-petabyte scale estate, processing billions of datapoints daily from thousands of data sources. Our stack combines Java and Python, with foundations of Kafka, ArcticDB, MongoDB, and more.

What you bring to the role

  • Experience working with large scale messaging and downsampling solutions
  • Strong academic record and a degree with high mathematical and computing content e.g. Computer Science, Mathematics, Engineering or Physics
  • 5-7 years of professional experience in software engineering with Java or Python as your primary language and knowledge of both
  • Proficient on Linux platforms and strong understanding of Git
  • Deep knowledge of one or more relevant database technologies such as Iceberg, Postgres, or MongoDB
  • Strong problem-solving skills and attention to detail
  • Strong communication and collaboration abilities
  • Ability to work independently and gather requirements from stakeholders

Advantageous to have

• Familiarity with distributed systems and orchestration

• Experience with performance optimization and large-scale data processing

• Contributions to open-source projects

• Experience working with Large Language Models (LLMs)

Cloud Solutions Architect - Up To £750 Per Day - London - Hybrid
Hunter Bond
London
Hybrid
Senior
£750/day

Location: London (Hybrid)

Rate: Up To £750 Per Day

Type: 6 Month Rolling Contract

We are working with a highly respected and long-established firm based in London that is looking to appoint an experienced Cloud Architect to play a key role in shaping and delivering its cloud strategy.

This is a senior, hands-on role offering the opportunity to design scalable, secure, and resilient cloud platforms that support business-critical systems across the organisation.

What you’ll be doing

  • Architecting AWS-based cloud platforms to support large-scale, data-intensive workloads
  • Driving the cloud architecture for enterprise data modernisation and migration initiatives
  • Defining patterns for scalability, resilience, security, and cost efficiency on AWS
  • Working closely with data engineering, platform, and security teams to deliver end-to-end solutions
  • Balancing strategic direction with hands-on architectural problem-solving

What you’ll need to have

  • Strong experience as a Cloud Architect or senior technical leader in AWS environments
  • A track record of delivering large-scale data transformation programmes
  • Deep understanding of AWS-native services used in modern data architectures
  • (e.g. data lakes, analytics platforms, streaming, distributed processing)
  • Experience designing systems that handle volume, velocity, and variety of data

If you’re a Cloud Architect looking for a strategic role within a respected London-based firm, we’d love to hear from you.

Senior Analyst-FX Technical Bank Integrations - London Stock Exchange Group
London Stock Exchange Group
London
Hybrid
Senior
Private salary

The Client Technical Services department is part of the LSEG FX business. It comprises of FX Technical Onboarding, Technical Account Management, Certification, STP (Straight Through Processing) and Venue Onboarding teams.

The FX Technical Onboarding team is responsible for leading customers through the FX technical onboarding journey including processing technical enablements and performing conformance testing of FX customers. Venues supported are FXall, Price Stream and Matching.

The team works closely with various areas of the wider business, including Sales and Account Management teams, Product, Product Development, and other resolver teams to onboard clients to FX platforms and act as the main point of contact for customers during their technical FX onboarding journey.

Role Description - The role mainly consists of creating or updating technical user configurations for FX customers, as well as organising network enablements, acting as primary liaison for buy and sell-side FX customers, software certification for various FX APIs and handling participant reference data across all the FX venues. It also involves automation/scripting of various manual processes to improve the overall efficiency of the onboarding process.

Key Responsibilities

Collaborate with internal stakeholders.

Resolve client queries, raise high-impact risks, and build internal relationships and networks with critical teams.

Keep up to date with changes to products and services to maintain quality of service.

Onboard new customer (buy-side) and new provider (sell-side) clients to FXall.

Build, develop and maintain automated solutions to manual processes, such as certification of FIX APIs.

Onboard market makers to FXall FIX APIs.

Certify customer FIX messages against internal LSEG FX FIX specifications.

Onboard customers to FXI and handle their participant data.

Liaise with clients and internal groups to handle Price Stream Entitlement requests.

Work closely with many internal teams including Sales and Account Management, Support teams, Dev teams, Professional Services, Product teams, Global Regulatory and Business Ops.

Gain and improve understanding of the wider business areas to develop cross-divisional relationships and improve process efficiency.

•Build specialist knowledge to analyse sophisticated data and determine and implement resolutions to operational risks in an accurate and timely manner, calling out operational risks where expertise is required.

Key Behaviours

Integrity

Has the sustained drive and energy to deliver quality and timely support

Willingly puts in the effort to ensure activities completed on time and to the quality required

Ability to work to deadlines and under pressure

Leads by example

Builds trust by keeping their word

Consistent and fair approach towards team

Partnership

Deals with conflict successfully

Seeks information/inputs from colleagues/clients and communicates openly

Uses all available resources and toolsets to investigate and resolve incidents

Takes on routine tasks as necessary

A confident teammate with good interpersonal skills and a ‘can do’ demeanour

Actively seeks feedback on their own performance

Good listener that understands matters well to decide on next steps

Change

Open to and willingly embraces new processes / approaches / ways of working.

Enthusiastic to achieve, develop and learn new skills.

Raises suggestions to improve the service provided.

Excellence

Oral and written communications are tailored to their audience’s needs;

Pro-active and demonstrates initiative;

Prioritizes activities according to business and operational need;

Performs structured analysis and problem solving

Analyses issues to identify the most appropriate solutions

Plans activities, provides progress reports, attends relevant meetings to represent team

Carries out work without prompting and close supervision

Key Skills

Degree or equivalent experience level.

Proven Customer Service skills and experience.

Good communication and problem-solving skills.

Understanding or working experience with FIX messaging protocol.

Exposure to or experience with certification/conformance trading software testing.

Worked in a professional and customer-focused environment where detailed process/procedures are followed.

FX market experience, understanding of FX products and order behaviours.

Strong standout colleague with ability to work in a fast-paced environment and under pressure.

Flexible to work within EMEA time zones until 18:00 GMT.

Helpful

Sophisticated knowledge of MS Platforms with exposure to process automation.

Familiarity with networking protocols, VPN, Extranet connectivity, understanding of TCP/IP concepts.

Exposure to trading platforms especially FXall/FX Matching is an advantage.

Experience working in FX markets, understanding of FX products and order types.

Strong analytical and logical thinking capabilities.

Highly motivated with strong social skills.

Experience/exposure to Python/SQL/Java or any other language useful for scripting and automation.

Career Stage:
Senior Associate

London Stock Exchange Group (LSEG) Information:

Join us and be part of a team that values innovation, quality, and continuous improvement. If you’re ready to take your career to the next level and make a significant impact, we’d love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject .

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

Lead AWS Software Data Engineer - London Stock Exchange Group
London Stock Exchange Group
London
Hybrid
Senior
Private salary
+2

ABOUT US:

LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It’s how we’ve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services - and our open-access model - we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.

LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ 25,000 people globally, more than half located in Asia Pacific. LSEG’s ticker symbol is LSEG.

OUR PEOPLE:

People are at the heart of what we do and drive the success of our business. Our culture of connecting, creating opportunity and delivering excellence shape how we think, how we do things and how we help our people fulfil their potential. We embrace diversity and actively seek to attract individuals with unique backgrounds and perspectives. We break down barriers and encourage teamwork, enabling innovation and rapid development of solutions that make a difference. Our workplace generates an enriching and rewarding experience for our people and customers alike. Our vision is to build an inclusive culture in which everyone feels encouraged to fulfil their potential.

We know that real personal growth cannot be achieved by simply climbing a career ladder - which is why we encourage and enable a wealth of avenues and interesting opportunities for everyone to broaden and deepen their skills and expertise. As a global organization spanning 70 countries and one rooted in a culture of growth, opportunity, diversity and innovation, LSEG is a place where everyone can grow, develop and fulfil your potential with meaningful careers!

ROLE SUMMARY:

Ready to build scalable data systems with real-world impact?

Join us at FTSE Russell! We’re establishing a team of engineers passionate about data, software craftsmanship, and substantial impact. As a Lead Software Data Engineer, you’ll help power the indices trusted by financial institutions worldwide. You’ll work in a modern AWS environment, build robust pipelines, and collaborate closely with product and business teams to deliver reliable, high-quality data solutions. We care about code quality, ownership, and helping each other grow. If you’re excited about building systems that matter, we’d love to meet you!

WHAT YOU’LL BE DOING:

We are building the next-generation data platform at FTSE Russell - and we want you to shape it with us. Your role will involve:

  • Designing and developing scalable, testable data pipelines using Python and Apache Spark
  • Orchestrating data workflows with AWS tools like Glue, EMR Serverless, Lambda, and S3
  • Applying modern software engineering practices: version control, CI/CD, modular design, and automated testing
  • Contributing to the development of a lakehouse architecture using Apache Iceberg
  • Collaborating with business teams to translate requirements into data-driven solutions
  • Building observability into data flows and implementing basic quality checks
  • Participating in code reviews, pair programming, and architecture discussions
  • Continuously learning about the financial indices domain and sharing insights with the team

WHAT YOU’LL BRING:

  • Writes clean, maintainable, testable, extensible Python code (ideally with type hints, linters, and tests like pytest)
  • Understands data engineering basics: batch processing, schema evolution, and building ETL pipelines
  • Has experience with or is eager to learn Apache Spark for large-scale data processing
  • Is familiar with the AWS data stack (e.g. S3, Glue, Lambda, EMR)
  • Strong experience in relational databases (e.g. Aurora PostgreSQL)
  • Enjoys learning the business context and working closely with stakeholders
  • Works well in Agile teams and values collaboration over solo heroics

NICE TO HAVES:

It’s great (but not required) if you also bring:

  • Experience with Apache Iceberg or similar table formats
  • Familiarity with CI/CD tools like GitLab CI, Jenkins, or GitHub Actions
  • Exposure to data quality frameworks like Great Expectations or Deequ
  • Experience with other data platforms like databricks, etc.
  • Curiosity about financial markets, index data, or investment analytics

Join us and be part of a team that values innovation, quality, and continuous improvement. If you’re ready to take your career to the next level and make a significant impact, we’d love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organization of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, color, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business, and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject .

Proud to share LSEG in the India is Great Place to Work certified (Jun '25 - Jun '26).

Learn more about life and purpose of our company directly from India colleagues’ video: Bengaluru, India | Where We Work | LSEG

Join us and be part of a team that values innovation, quality, and continuous improvement. If you’re ready to take your career to the next level and make a significant impact, we’d love to hear from you.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership , Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs.

You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence . Colleagues can get involved through fundraising and volunteering.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject .

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

Data Engineer
McCabe & Barton
London
Hybrid
Junior - Mid
£45,000 - £65,000
+1

Our client is looking for Junior and Middle level Data Engineer to join the teams. 1 day in office every 3 months. Permanent, salary is £45k- £65k depending on experience Job Details: 1. Develop, document and maintain robust processes that transform and clean data for input into a variety of live systems and analytical workflows 2. Liaise with colleagues across the business to elaborate requirements for new data products and translate these into technical plans 3. Maintain process quality and robustness through coding best practice, including version control, documentation and peer review 4. Investigate and elaborate data issues to help drive continuous improvement in data quality 5. Migrate Legacy processes to new data platforms 6. Learn new tools and techniques to support data processing and analytics as we expand our toolkit Skills we would love you to have: 1. Minimum 2:1 in a relevant technical degree. 2. A good understanding of database architecture and querying using SQL. 3. A sound understanding of data transformation and cleaning. 4. Programming experience using any language such as Python. 5. Understanding of Microsoft Azure, Power BI and Snowflake only need skills in SQL, Cognos and a data visualization tools like Tableau, Power BI or Qlik 6. 2- 4 years experience, good communication to work across functional team

Data Engineer (Big Data/ Hadoop/ Spark Dev)
Hays Technology
London
Remote or hybrid
Mid - Senior
£550/day - £700/day
+2

Your new company Working for a renowned financial services organisation Your new role We're looking for a Data Engineer to design and deliver scalable on prem, high‑quality data solutions for low/ high-level data platforms that power analytical and business insights. This is a hands‑on role suited to someone with strong data engineering and big data expertise, ideally gained within financial services. Using , Big Data tools and Spark development you will ensure data quality through automated validation, monitoring, and testing. You will also enable seamless integration across data warehouses and data lakes, contributing to a robust, scalable, and resilient enterprise data ecosystem. What you'll need to succeed Strong Data Engineering expertise with Big Data technologies. Experience designing and building on‑prem data platforms, from high‑level architecture to detailed technical design. Strong Spark development experience. Hands‑on experience with Hadoop - configuring multi‑node Hadoop clusters, including resource management, security, and performance tuning. Strong Big Data engineering background using Apache Airflow, Spark, dbt, Kafka, and Hadoop ecosystem tools. Knowledge of RDBMS systems (PostgreSQL, SQL Server) and familiarity with NoSQL/distributed databases such as MongoDB. Proven delivery of streaming pipelines and real‑time data processing solutions. Delivered streaming pipelines and real‑time data processing solutions. What you'll get in return Flexible working options available. What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at (url removed)

Python Engineer- Global Quant Firm
Oxford Knight
London
In office
Mid - Senior
£200,000

Salary: up to £200k base + bonus

Summary

My client is a leading global quant firm looking for a no-nonsense technologist to join one of their growing quant trading teams based in London. This team is one of the most experienced and profitable at the company.

Collaborating extensively with traders and other technologists, your main focus will be designing, building, maintaining and testing cutting-edge systems. You’ll be exposed to a wide range of technologies and challenging problems involving big data and HPC. Most problems require high-availability, high-throughput and low latency solutions.

Technology is prized by the traders as crucial to their continued success. Unique in their field, this global firm combines the lively, positive spirit of a start-up with the stability of a longer-established player.

If you’re passionate about coding and automation and able to solve difficult technical problems in a fast-paced and energetic environment, this role would be perfect for you.

Requirements

  • Strong knowledge of Python and Linux
  • Excellent analytical and problem-solving skills
  • Self-directed and able to take ownership of projects and responsibilities
  • Minimum bachelor’s degree in Computer Science or Computer Engineering (or equivalent)

Desirable

  • Experience working with HPC systems and technologies such as grid clusters, large data processing, etc.
  • Exposure to C++ or willingness to learn

NB: Please don’t apply if you are a fresh graduate.

Benefits

  • Competitive base salary & bonus
  • Enormous opportunity to grow and have an impact
  • Contributions are rewarded; career progression supported
  • Free breakfast, lunch and dinner

Whilst we carefully review all applications, to all jobs, due to the high volume of applications we receive it is not possible to respond to those who have not been successful.

Contact
If this sounds like you or you would like to know more, please get in touch:

Andy Stirling-Martin
andy@oxfordknight.co.uk
020 3137 9579
linkedin.com/in/andrew-stirling-martin-7664a946

Technical Lead - London Stock Exchange Group
London Stock Exchange Group
London
Hybrid
Senior
Private salary
+16

Role Profile

Are you passionate about making developers’ lives easier, faster, and more fulfilling? Do you dream of streamlining workflows, squashing bugs, and fuelling innovation? We’re on a mission to supercharge our engineering culture by building a world-class Developer community that’s the envy of the industry.

In this role, you’ll be joining our Engineering Team within Engineering Excellence & Productivity (EXP) as a Technical Lead.

Developer Platforms’ mission is to:

  • Enable rapid developer onboarding to LSEG developer tools, ensuring they become productive quickly to build applications on their chosen Cloud platform
  • Improve Developer Experience by increasing their ability to improve cadence of delivery of new features
  • Unlock Developer Capacity and enable greater Innovation by modernising tooling and processes
  • Ensure that development on the integrated platform is both secure and compliant by design

Tech Profile/Essential Skills

  • Good knowledge of Infrastructure as Code concepts (IAC) and basics of Microservices architecture

  • Knowledge of Cloud Technology basics across CSPs - Amazon, Microsoft, and Google (at least one)

  • Knowledge and implementation experience of DevOps, CI/CD, DevSecOps concepts

  • Good level of understanding of Architecture principles, design methodologies and their applicability

  • Hands-on experience of the following:

  • Creating and deploying CI/CD pipelines (GitLab / Jenkins / GitHub)

  • Configuring and running Code/Binary scans using solutions like SonarQube, Semgrep, Blackbuck, Trivy, GitLeaks Veracode, etc.

  • Configuring and using Secrets management tools like Vault and Cloud native solutions

  • Broad knowledge of SDLC Tools, specifically Build, Test and Deploy Automation tools, e.g., Maven, Gradle, Selenium, Ansible, etc.

  • Good understanding of Source code mgmt solutions like GitHub, GitLab, BitBucket, etc.

  • Good understanding of Artifact and dependency mgmt solutions like JFrog, Nexus, etc.

  • Good understanding on Containerisation solutions, e.g., K8, Docker, Kaniko, etc.

  • Proficiency in at least one of the standard programming languages - Java/JavaScript, C#, Python, or similar Object-oriented programming

  • Proficiency in at least one of the standard scripting languages - Terraform, Bash, Ansible, etc.

  • Good understanding of Software engineering concepts, e.g., coding techniques (DRY principles), Trunk based development (Branching/Merging techniques), etc.

  • Good understanding of Developer Desktops - both Physical and Virtual (W365) and implementation of tooling framework/solutions for Desktops

  • Good understanding of the basics of Gen AI concepts and solutions - GitHub Copilot, GitLab Duo, Q developer.

  • Previous experience in a Project delivery, Coordination or Support role

  • Previous experience of Software Development, Business and Technical Analysis, Quality Assurance, and / or Emerging Technology and Governance

  • PPM Tools (ex: Clarity, JIRA, Asana)

Preferred Skills and Experience

  • Hands-On experience of working on Windows/ Linux Servers. Cloud services (AWS/Azure/GCP).

  • Managing incidents, change requests, service requests and driving TRT (Technical Recovery Team) calls.

  • Strong problem solving skills on these platforms

  • Minimum knowledge and understanding of financial markets are desirable.

  • Ability to work independently and in a team environment.

  • Ability to communicate effectively in English with all levels of staff, both orally and written.

  • Ability to manage own work and multitask to meet tight deadlines without losing sight of priorities under minimum supervision.

  • Highly motivated, self-directed individual with a positive & pro-active attitude to work.

  • Customer and service focused, with determination to meet their needs and expectations.

  • Be driven and committed to the goals and objectives of the team and organization.

  • Second line point of escalation in event of a major incident

KEY COMPETENCIES

  • Deploys agile standard methodologies as appropriate throughout the software development lifecycle.
  • Analyses infrastructure requirements and designs the architecture for central or distributed processing to meet user requirements.
  • Creates, applies and implements technologies to deliver and produce services with minimal human intervention, to improve the efficiency, reliability and speed tasks.
  • Develops, tests and maintains software applications and related programs and procedures; demonstrates creativity and innovation using available software development tools and following design requirements.
  • Creates and maintains documentation to describe the system and its parts, including requirements documents, design decisions, architecture descriptions, program source code and support documentation.
  • Possesses depth of technical expertise, knowledge of technologies and design, development and implementation of technologies.
  • Possesses knowledge of features and facilities for integration, and communication among applications, databases and technology platforms to bring together different components and form a fully functional solution to a business problem.
  • Shows ability to come up with new ideas and novel approaches to problems and establish solutions through different methods.
  • Partners with clients and resolves issues by diagnosing problems, determining possible resolutions and implementing effective solutions
  • Defines a problem, generates solutions, and evaluates and identifies the best solution to overcome the problem.
  • Interacts well with others, quickly establishing rapport building positive relationships and networks.
  • Ensures a product/service meets or exceeds specified standards and objectives to achieve desired level of quality

Education and Professional Skills

  • Curious about new technologies and tools, creative thinking and initiative taking.
  • Solid English reading/writing capability required.
  • Strong communication & collaboration skills.
  • Commitment to DevOps culture
  • Familiarity with Agile principles including any hand on experience

Detailed Responsibilities

  • Ensure quality deliverables to ensure software meets or exceeds specified standards and objectives.
  • Apply software engineering principles and practices to design, build, and run solutions which are scalable and reliable.
  • Design, develop, modify, adapt and implement short and long-term solutions to technology needs through new and existing applications, systems architecture, network systems and applications infrastructure.
  • The team(s) continuously fine-tune systems to meet stringent non-functional requirements on performance, resilience and operability, and design.
  • Demonstrates significant knowledge of a single or multiple technologies and advises on design, development and implementation
  • Advances tools and applications by producing clean and efficient code and reviews others’ code when required
  • Handles own workload and promotes an inclusive and open culture
  • Demonstrates depth of knowledge and expertise in software development and is regarded as the SME in their domain. Develops knowledge of other domains to understand linkages and dependencies
  • Understands the tech strategy and culture, and how they impact own work as well as adjacent teams
  • Oversees the design work and planning for user journeys ensuring the achieve the desired objectives
  • Supports the creation of solutions for Epics and the associated implementation tasks
  • Adapts existing patterns to develop robust solutions
  • Develops understanding of LSEG’s commercial direction and how technology is forming a part of this
  • Completes the delivery of given tasks with some guidance and oversight
  • Builds strong relationships with senior internal stakeholders, growing network and collaborating with own team and colleagues in other domains. Communicates complex information clearly to relevant audiences
  • Takes initiative to develop knowledge in technology products and tools through on the job learning, certifications and projects.
  • Must interact with global teams in time zones spanning UK, US, APAC areas.
  • Engage in and improve the whole lifecycle of services-from inception and design, through to deployment, operation, and refinement.
  • Support services before they go live through activities such as system design consulting, developing software platforms and frameworks, capacity planning and launch reviews.
  • Maintain services once they are live by measuring and monitoring availability, latency, and overall system health.
  • Scale systems sustainably through mechanisms like automation and evolve systems by pushing for changes that improve reliability and velocity.
  • Build a CI/CD pipeline and maintain the pipeline for Software Delivery.
  • Collaborate with Security and Infrastructure teams to ensure the patching are up to date.
  • Co-ordinate and work with Devops Capability team to perform the Disaster recovery for the applications.
  • Participate in Project related activities to meet operational needs.
  • To ensure knowledge Articles of all supported systems is continually updated.
  • To provide a high level of customer service, whilst working under pressure.
  • To follow and adhere to established Incident Management, Change Management and Problem Management procedures.

LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth.

Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership , Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions.

Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce. You will be part of a collaborative and creative culture where we encourage new ideas and are committed to sustainability across our global business. You will experience the critical role we have in helping to re-engineer the financial ecosystem to support and drive sustainable economic growth. Together, we are aiming to achieve this growth by accelerating the just transition to net zero, enabling growth of the green economy and creating inclusive economic opportunity.

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants’ and employees’ religious practices and beliefs, as well as mental health or physical disability needs.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject .

If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.

Frequently asked questions
Haystack features a variety of Processing-related roles in London, including data processing, payment processing, workflow automation, and transaction processing positions across industries such as finance, retail, and IT services.
While some Processing jobs may require certifications such as Six Sigma, ITIL, or specific software knowledge, many positions value practical experience and relevant technical skills. Job listings on Haystack detail any required certifications.
Yes, Haystack lists both on-site and remote Processing job opportunities in London. You can filter your search to find remote positions that fit your preferences.
New Processing jobs are posted regularly on Haystack, often daily. To stay up-to-date, you can set up job alerts specific to Processing roles in London.
Salaries for Processing jobs in London vary based on role, experience, and company size. Entry-level positions typically start around £25,000, while senior roles can exceed £70,000 annually. Specific salary details are provided in each job posting.