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Platform Performance Engineer - London- Leading Quant-Driven Market-Maker

Oxford Knight

London

Salary: up to £200k + bonus

Location: London

Summary

Not your standard algo trading firm, this leading market-maker takes pride in its flat hierarchy, teamwork, and rewarding people on merit and excellence. Specialists within electronic market-making in FX, equity, fixed income and commodity markets, they have one of the best names in the industry and attract the best talent.

They’re now seeking a Platform Performance Engineer to join one of the trading application teams, initially to focus on the performance (both throughput and latency) of cloud-based hosts, but also to be responsible for the performance of a global, co-located trading system.

To begin with, you’ll drive cost efficiency of existing trading deployments and look at on-prem work, e.g. hardware-specific instrumentation & co-ordination of A/B performance experiments. Future projects may cover adapting AWS-based deployment to new clouds (e.g. GCP) and integrating all AWS provisioning into the trading team’s inventory management system over time.

Requirements

Passionate about closely examining impact-oriented performance work, especially in cloud
Familiarity with standard Linux tooling, particularly network diagnostics
Deep knowledge (or keen to acquire deep knowledge) of protocols including TCP, WebSockets, HTTP, TLS, FIX
Comfortable using a statically typed programming language
Experience with infrastructure-as-code techniques and tools, such as Terraform

NB: Please do not apply if you are a fresh graduate.

Benefits

Significant compensation package - you are making a direct impact on the PnL
Collaborative and friendly environment where everyone is valued and treated as an individual
Outstanding benefits, including electric vehicle/cycle to work schemes, annual health screening, and workplace nursery scheme
Cutting-edge, beautiful offices in central London or Singapore

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

Senior Front Office Engineer- Leading Global Energy Commodities Trading

This is an energy trading and infrastructure asset investment firm, powered by deep fundamental research and advanced analytics. Now looking for experienced engineers in any programming language to join the Data Science & Technology team in London.

This team is pivotal in giving the firm a competitive edge, and this role offers the opportunity to build solutions that have a direct commercial impact from day one. Solving complex, high-impact challenges using a modern technology stack, everything is developed in cloud-native infrastructure from real-time analytics to backtesting engines, to third party integrations and internal libraries. A few examples of what you’ll do:

Partner directly with traders & analysts to engineer and optimize trading processes and strategies.
Build and maintain scalable, high-performance Python services and APIs
Design and implement cloud-native tools that integrate seamlessly into the Front Office platform
Design and build a robust, reusable framework to support back-testing activities

If you like to work within a fast-paced, data-driven trading environment, making a direct impact on systematic trading and risk management efforts, this position would be perfect for you.

Requirements

Strong professional experience in any programming language (Python highly beneficial)
Proficiency in SQL and relational database technologies
Familiarity with DevOps practices
Ability to communicate effectively with technical and non-technical colleagues

Desirable

Exposure to AWS & Snowflake technologies
Experience building or working on back testing engines and systematic trading
Experience in energy or commodities trading

Rewards and Incentives

Competitive base salaries + bonuses
Generous benefits program, including
- parental and family leave policies
- comprehensive insurance (medical, dental, retirement, life)
- charity volunteering allowance + charitable contribution match program
- tuition assistance & reimbursement + continued learning opportunities

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

Rust Developer - Jnr/Mid-Level - Crypto - DeFi - OTC - Smart Contracts

Rothstein Recruitment Ltd

Excellent opportunity opens for an ambitious Engineer experienced in building complex systems using Rust, who is passionate about Crypto and blockchain technology and excited to drive innovation. The ideal candidate will have worked in the Crypto Space and will be well-versed at building Smart Contracts.

Strong understanding of Rust and can design and implement robust, efficient, and secure systems.
Comfortable writing clean, scalable, and well-tested code.
Working in a fast-paced start-up environment, where you’ll need to take initiative and solve problems independently.
Pushing code that supports tens of billions of dollars of daily transactional volume doesn’t scare you.
Tech-passionate, curious and eager to learn new technologies and design patterns.
Experienced at navigating up and down a deep technical stack.
Capable of articulating complex technical concepts clearly and succinctly.
Excellent problem-solving skills and attention to detail.

About You:

Bachelor’s degree in Computer Science or related field, or equivalent practical experience.
2+ years of experience in systems programming, with a strong focus on Rust.
Previous experience with blockchain technologies, smart contracts, and decentralised finance.
You have conviction in your architecture/designs/ideas but are open minded to share and build solutions with others.
Experience with AWS services, particularly related to deploying, managing, and scaling applications.
Proficiency in Back End development languages, such as Typescript.
Experience working with workflow engines.

Interested? Please Apply!

Rust Developer Rust Code Rust Coding Rust Specialist Software Engineer Development Rust Engineer Crypto Digital Assets Blockchain Web3 Web3 Go Golang Programme Programming Decentralised Azure AWS Automate Smart Contract Smart Contracts Small Contracts Equity Bank Banking Hedgefund Trading Low Latency Ultra Low Latency Financial Services Decentralised Finance Remote WFH Hybrid Work Abroad Ethereum DeFi OTC Financial Services Investment Banking Banking Smart Contracts Workflow Engines Rust (Programming Language) Crypto Programming Systems Programming Go (Programming Language) Amazon Web Services (AWS)

Senior Golang Developer - Kubernetes - Financial Services

Rothstein Recruitment Ltd

+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

Security Consultant/Analyst

Job Title: Security Consultant/Architect

Location: London (hybrid)

Length: 6 months

PAYE only

Overall purpose of the role

Are you a security professional with a “shift-left” mindset and a passion for building secure-by-design platforms? Join Barclaycard Payments as we build a brand-new, cloud-native, and fully independent fintech-style merchant acquiring platform.

This isn’t about maintaining legacy systems; it’s about building a target-state platform from the ground up. As a Security Consultant / Analyst , you will be embedded within the CISO function, working directly with engineering and product teams to ensure security is woven into the fabric of the GAIA roadmap.

You will act as a bridge between high-level security standards and technical execution. This role is a blend of Cyber Business Analysis, GRC (Governance, Risk, and Compliance), and Technical Consultancy.

Key Accountabilities:

Secure-by-Design: Provide pragmatic security guidance to engineering workstreams, reviewing designs and technical specifications to identify risks early in the SDLC.
Control Mapping & BA: Perform deep-dive business analysis to map cyber controls against the GAIA roadmap, ensuring alignment with the Barclays Cyber Control Library and refreshed Cyber Standards.
Cloud & DevOps Security: Support the secure configuration of AWS workloads, CI/CD pipelines (GitHub), and containerised environments (Docker/Kubernetes).
Compliance & Frameworks: Ensure the platform is built to be PCI DSS compliant, utilizing frameworks such as ISO 27001/2 and NIST CSF .
Risk Orchestration: Help translate complex technical risks into business-relevant terms for stakeholders, ensuring all risks are logged, understood, and mitigated.
Assurance: Assist in preparing for penetration testing, remediating findings, and validating control improvements.

Key Skills:

We are looking for a high-energy consultant who has spent the last 5+ years in Cyber Security, ideally within Fintech or Financial Services. You should be comfortable “spinning plates” in a greenfield environment and have a strong background in reporting to CISO leadership.

Essential Experience:

Cyber experience within Fintech/Financial Services: Proven experience in security consultancy, advisory, or GRC roles.
Cyber Business Analysis: At least 2 years of recent experience in mapping cyber controls and navigating complex project roadmaps.
Framework Fluency: Deep understanding of ISO 27001/2, NIST CSF, and PCI DSS.
Cloud & Modern Engineering: A solid grasp of cloud implementations (AWS preferred) and secure development lifecycle principles.
Stakeholder Mastery: The ability to challenge and influence developers, architects, and risk officers effectively.

Desirable Skills:

Experience securing End User Compute (EUC), specifically MacBooks managed via JAMF.
Administration and securing of Google Workspace environments.
Knowledge of merchant acquiring, payment flows, and fintech ecosystems.
Security certifications (CISM, CISSP, or equivalent) are a plus.

About Barclays

Barclays is a British universal bank. It is diversified by business, by different types of customers and clients, and by geography. Barclays businesses include consumer banking and payments operations around the world, as well as a top-tier, full service, global corporate and investment bank, all of which are supported by its service company which provides technology, operations and functional services across the Group.

Values

Everything Barclays does is shaped by its five values of Respect, Integrity, Service, Excellence and Stewardship. The Barclays values inform the foundations of its relationships with customers and clients, but they also shape how Barclays measures and rewards the performance of colleagues. Simply put, success is not just about what you achieve, but about how you achieve it.

Diversity

Barclays aims to foster a culture where individuals of all backgrounds feel confident in bringing their whole selves to work, feel included and their talents are nurtured, empowering them to contribute fully to Barclays vision and goals.

Hybrid Working

Barclays is currently in the early stages of implementing a hybrid working environment, which means that many colleagues spend part of their working hours at home and part in the office, depending on the nature of the role they are in. Barclays is flexible on how this works and it may continue to change and evolve. Depending on your team, typically this means that colleagues spend a minimum of between 20% to 60% of their time in the office, which could be over a week, a month or a quarter. However, some colleagues may choose to spend more time in the office over a typical period than their role type requires. Barclays also has a flexible working process where, subject to business needs, all colleagues globally are able to request work patterns to reflect their personal circumstances

Your Benefits

As a contract employee of Randstad Sourceright, you’ll receive a wide range of financial and personal benefits. There’s enrolment in a pension plan (after 12 weeks on assignment) and holiday pay. You’ll also get 24/7 access to an Employee Assistance Programme, designed to help you deal with any problems that could be affecting your home or work life. Plus, there’s discounts at heaps of high street shops, restaurants and entertainment - from Asda to Zizzi Italian restaurants.

Senior Data Engineer (Short-Term Power Markets)- Leading Global Energy Commodities Trading

This is an energy trading and infrastructure asset investment firm, powered by deep fundamental research and advanced analytics. Now seeking a skilled senior data engineer to support the Intraday Short-Term Power business within the Data Science & Technology team in London.

This team is pivotal in giving the firm a competitive edge, and this high-impact role focuses on engineering the availability, quality and performance of real-time data feeds that drive execution strategies, analytics and decision-making. You’ll integrate & manage feeds from multiple sources, including fundamental market data, grid operations, weather providers and internal trading systems.

This is an exciting opportunity to work within a fast-paced, data-driven trading environment, making a direct impact on systematic trading and risk management efforts.

Requirements

5 -10 years as a data engineer, ideally in Intraday Short-Term Power trading (or similar real-time energy market environments)
Experience with energy commodity time-series datasets is a must-have
Understanding of systematic trading workflows (signal generation, back-testing, model validation)
Demonstrable ability to work in a high-frequency, intraday trading environment with tight feedback loops
ETL/ELT frameworks experience writing pipelines to load millions/billions of records
Advanced skills in writing highly optimized SQL code & relational databases
Hands-on experience developing data solutions in Python, Pandas, Numpy, etc.

Desirable

Exposure to AWS & Snowflake technologies
Familiarity with short-term power market data sources, such as EPEX, ENTSO-E or Nord Pool, is strongly preferred

Rewards and Incentives

Competitive base salaries + bonuses
Generous benefits program, including
- parental and family leave policies
- comprehensive insurance (medical, dental, retirement, life)
- charity volunteering allowance + charitable contribution match program
- tuition assistance & reimbursement + continued learning opportunities

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

Quant Developer - Vol- Systematic Quant Fund

Our client is a leading tech-driven quant and systematic hedge fund trading with offices across the globe. They leverage deep knowledge in data, research, technology and trading to deliver high-quality returns in a dynamic and fast-paced environment, with excellent opportunities for career growth.

Looking for a motivated Python Quant Developer to work within a trading desk alongside Quant Researchers and Traders where you will have a direct & immediate impact on the desk’s success. Your primary focus will be building applications to provide market data & insights to inform trading decisions. This role offers exposure to many aspects of volatility trading, including derivatives pricing, data management and analytics structure (cloud computing and ML technologies).

The ideal candidate is tech-driven, with experience developing trading apps and/or setting up trading framework.

Requirements

1-3 years’ professional experience, likely at a bank or a fund
Comfortable in Python, in particular Python libraries: numpy, pandas, matplotlib, etc.
Proficient with AWS
Good knowledge of SQL and relational databases
Outstanding communication skills

Desirable

Available to start immediately
Knowledge of financial derivatives and options

Benefits

Great opportunity to be part of a collaborative, creative environment where you can feel valued for your input
Competitive salary + generous benefits
Professional and personal development
Relaxed, casual culture, with a healthy work-life balance

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 a strong match for this role, please do not hesitate to get in touch:

Dominic Copsey
dominic.copsey@oxfordknight.co.uk
+44 (0) 203 475 7193
linkedin.com/in/dom-copsey-586478143/

Senior Front Office Engineer (Short-Term Power Markets)- Leading Global Energy Commodities Trading

This is an energy trading and infrastructure asset investment firm, powered by deep fundamental research and advanced analytics. Now looking for highly experienced Python engineers who can sit at the intersection of technology and trading to join the Data Science & Technology team in London.

This team is pivotal in giving the firm a competitive edge, and the initial scope of this role will focus on short-term power initiatives, building tools and systems that directly enable the front office to test and execute strategies efficiently in fast-moving markets.

To do this, you’ll design, develop and maintain real-time trading applications, analytics platforms, and data pipelines critical to decision-making and strategy deployment for the European Intraday Power desk.

This is an exciting opportunity to work within a fast-paced, data-driven trading environment, making a direct impact on systematic trading and risk management efforts.

Requirements

10+ years of professional software engineering experience in Python
Experience with modern frameworks, APIs, and cloud-native architecture
5 years’ supporting Intraday Short-Term Power trading (or similar real-time energy market environment)
Strong foundation in Computer Science fundamentals, including data structures, algorithms, and software design principles
Proficiency in SQL and relational database technologies
Familiarity with DevOps practices, including Docker and cloud-native deployments
Experience in Linux and Windows environments

Desirable

Exposure to AWS & Snowflake technologies
Familiarity with fundamental and weather datasets, as well as market data sources such as EPEX, ENTSO-E, or Nord Pool.

Rewards and Incentives

Competitive base salaries + bonuses
Generous benefits program, including
- parental and family leave policies
- comprehensive insurance (medical, dental, retirement, life)
- charity volunteering allowance + charitable contribution match program
- tuition assistance & reimbursement + continued learning opportunities

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

AWS Cloud Security Engineer - Tribus

AWS Cloud Security Engineer - Global Quant Trading Environment - Hong Kong - Relocation Package

A leading global trading and investment firm is hiring an AWS Cloud Security Engineer to strengthen its security posture across high-performance research and trading platforms.

You’ll be at the centre of securing and optimising AWS infrastructure - from IAM and SCP/RCP policy management through to encryption, automation, and real-time monitoring.

This role offers exposure to cutting-edge environments where technology, data, and security are mission-critical.

What you’ll do

Implement and enhance AWS cloud security controls.
Manage IAM frameworks and enforce least-privilege access.
Deploy GuardDuty, Security Hub, Config, and CloudTrail for proactive monitoring.
Support encryption strategies (KMS) to safeguard sensitive data.
Define and maintain AWS security baselines and compliance checks.
Build automation frameworks using Terraform/CloudFormation.
Strengthen cloud security operations via CSPM, CWNP, and ASPM methodologies.
Partner with IT, risk, and leadership teams to align security with business goals.

What we’re looking for

3+ years in cloud security, platform security, or DevSecOps.
Strong AWS expertise, especially IAM, SCP, RCP, and security baselining.
Hands-on with Terraform/CloudFormation and Python scripting.
Familiarity with cloud security operations tooling (CSPM/CWNP/ASPM).
Strong analytical, problem-solving, and stakeholder engagement skills.
A growth mindset with eagerness to expand in cloud security.

If you’re seeking a high-impact role where AWS security is front and centre, this is a standout opportunity.

Leading industry & relocation packages available

AWS Engineer / Architect - Tribus

Location: Hong Kong - relocation package on offer - industry experience required

A leading proprietary trading firm in the crypto space is searching for an experienced Senior AWS Engineer/Architect to own and evolve its global trading infrastructure.

The team operates at the cutting edge of high-frequency trading, processing billions in daily volume across venues worldwide.

What you’ll do

Design and optimize multi-region AWS architectures to support ultra-low latency systems.
Engineer high-throughput data pipelines and automate large-scale deployments.
Deep-dive into Linux networking and system tuning for maximum performance.
Partner with developers and quants to align infrastructure with trading strategies.
Drive infrastructure-as-code, monitoring, and security best practices across the platform.

What we’re looking for

8+ years in AWS architecture/engineering with production-grade systems.
Expertise in Linux internals, networking, and large-scale system optimization.
Strong scripting skills (Python, Bash) and hands-on IaC experience (Terraform/Ansible).
Background in trading, HFT, or other ultra-low-latency environments is highly valued.

Why apply?

Be part of a performance-driven, flat-structured team shaping the future of crypto trading.

Work on problems where nanoseconds matter, using AWS at true scale.

Competitive compensation, relocation support, and a role at the frontier of financial markets.

Senior Market Risk Developer - Market Data - Jefferies

Senior Market Data Developer – End-of-Day Pricing & Risk Infrastructure

Position / Group description:

The Risk Technology group builds and supports a global risk platform enabling the Risk Management group to oversee all areas of risk across the Firm. The risk platform provides capabilities for measuring, quantifying, analyzing, reporting, and controlling exposures across market and credit.

We are seeking a Market Data Developer to design and implement solutions for sourcing, storing, and delivering end-of-day (EOD) market data used in pricing and risk calculations. This role requires strong technical skills in Python, SQL, Snowflake, AWS , and deep domain knowledge of market data across multiple asset classes. The candidate will work closely with the Risk Orchestration team to provide accurate and timely market data inputs for pricing engines and risk models.

Primary Responsibilities:

Data Sourcing & Integration

Source EOD market data by region from various front-office marking systems and external providers.
Validate and normalize data across asset classes for pricing and risk consumption.

Data Modeling & Storage

Design and implement data models in Snowflake to persist: End-of-day prices, Volatility surfaces, Credit spread curves, Discount curves and other risk-related market data

Infrastructure Development

Provide solutions to pricing engines to deliver market data by region with high reliability and performance.
Build scalable, cost-efficient Snowflake infrastructure and optimize queries for performance.
Implement data quality checks and ensure auditability.
Integrate with AWS SQS messaging for data readiness events.

Collaboration

Work closely with Market Data and Risk teams to define canonical market observables and maintain data lineage.
Work closely with Risk Orchestration team to ensure all market data inputs meet requirements for pricing and risk analytics.

Essential Experience/ Skills:

7+ years of hands-on experience in developing applications using Relational Databases and Big-data platforms.
Strong Python (pandas, numpy, data engineering best practices).
Advanced SQL and Snowflake (schema design, warehouse management, streams/tasks, query optimization).
ETL/ELT pipeline development

Domain Knowledge:

Market data concepts across multiple asset classes (Rates, FX, Credit, Equities, Commodities).
Understanding of EOD pricing and risk inputs for VaR, sensitivities, and stress testing.
Bachelor’s degree, preferably in Computer Science, Engineering, Mathematics, or similar technical discipline

Personal Attributes:

Strong analytical and problem-solving skills, including the ability to troubleshoot and resolve complex data related issues
Strong verbal and written communication skills
Self-starter and entrepreneurial in approach
Ability to escalate and follow-up proactively
Good time management skills

At Jefferies, we believe that diversity fosters creativity, innovation and thought leadership through the infusion of new ideas and perspectives. We have made a commitment to building a culture that provides opportunities for all employees regardless of our differences and supports a workforce that is reflective of the communities where we work and live. As a result, we are able to pool our collective insights and intelligence to provide fresh and innovative thinking for our clients.

Jefferies is an equal employment opportunity employer. We practice equal opportunity for all, and all qualified applicants will receive consideration for employment without regard to race, creed, color, national origin, ancestry, religion, gender, pregnancy, age, physical or mental disability, marital status, sexual orientation, gender identity or expression, veteran or military status, genetic information, reproductive health decisions, or any other factor protected by law. We are committed to hiring the most qualified applicants and complying with all federal, state, and local equal employment opportunity laws. As part of this commitment, Jefferies will extend reasonable accommodations to individuals with qualified disabilities, as appropriate, under applicable law.

Senior Market Risk Developer – Historical Timeseries - Jefferies

Senior Market Risk Developer – Historical Timeseries

Position / Group description:

The Risk Technology group builds and supports a global risk platform enabling the Risk Management group to oversee all areas of risk across the Firm. The risk platform provides capabilities for measuring, quantifying, analyzing, reporting, and controlling exposures across market and credit.

The position is for a Techno-Functional Developer to design, enhance, and maintain the Market Risk Time Series infrastructure built on Snowflake and AWS. This role requires strong technical skills combined with deep domain expertise in market risk, including VaR , end-of-day market data , and historical time series. The candidate will work closely with the Market Data team and Risk stakeholders to ensure accurate, scalable, and auditable data solutions for risk analytics.

Primary Responsibilities:

Data Sourcing & Integration
Source historical market data from multiple internal and external providers.
Integrate with quant libraries to identify data quality issues and validate risk inputs.

Data Quality & Remediation

Integrate with Quant APIs to detect and remediate common data quality issues (gaps, stale data, outliers, misalignments).
Implement algorithms for gap-filling, back-filling, and anomaly correction to ensure data is fit for VaR and SVaR calculations.

Infrastructure Development

Build and enhance Snowflake-based time series infrastructure for scalability and performance.
Develop Python ETL/ELT pipelines and optimized SQL models for historical time series storage and retrieval.

Collaboration & Governance

Work closely with Market Data and Risk teams to define canonical market observables and maintain data lineage.
Ensure reproducibility and auditability of risk inputs for regulatory compliance.

Essential Experience/ Skills:

7+ years of hands-on experience in developing applications using Relational Databases and Big-data platforms.
Strong Python (pandas, numpy, data engineering best practices).
Advanced SQL and Snowflake (warehouse management, streams/tasks, query optimization).

Domain Knowledge

Market risk concepts: VaR, SVaR, sensitivities, stress testing.
Handling end-of-day market data and historical time series across asset classes.
Techno-Functional
Ability to translate risk requirements into technical solutions and data contracts.
Bachelor’s degree, preferably in Computer Science, Engineering, Mathematics, or similar technical discipline

Personal Attributes:

Strong analytical and problem-solving skills, including the ability to troubleshoot and resolve complex data related issues
Strong verbal and written communication skills
Self-starter and entrepreneurial in approach
Ability to escalate and follow-up proactively
Good time management skills

At Jefferies, we believe that diversity fosters creativity, innovation and thought leadership through the infusion of new ideas and perspectives. We have made a commitment to building a culture that provides opportunities for all employees regardless of our differences and supports a workforce that is reflective of the communities where we work and live. As a result, we are able to pool our collective insights and intelligence to provide fresh and innovative thinking for our clients.

Jefferies is an equal employment opportunity employer. We practice equal opportunity for all, and all qualified applicants will receive consideration for employment without regard to race, creed, color, national origin, ancestry, religion, gender, pregnancy, age, physical or mental disability, marital status, sexual orientation, gender identity or expression, veteran or military status, genetic information, reproductive health decisions, or any other factor protected by law. We are committed to hiring the most qualified applicants and complying with all federal, state, and local equal employment opportunity laws. As part of this commitment, Jefferies will extend reasonable accommodations to individuals with qualified disabilities, as appropriate, under applicable law.

Public Cloud - Forward Deployed Engineer (VP) - Citi

+2

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
About the Opportunity
Are you a seasoned technologist with a passion for building cutting-edge enterprise products and a hands-on approach to engineering? Join Citi’s Cloud Technology Services (CTS) team and be part of our commitment to transform Citi’s technology by leveraging game-changing cloud capabilities to drive agility, efficiency, and innovation.
We’re providing our businesses with a competitive edge by leveraging the scale of the public cloud and enabling new infrastructure economics. As the Forward Deployed Engineer, you will play a pivotal role in shaping and executing our public cloud strategy.
You will be part of a team that continues to deliver big! From building a cloud-based High-Performance Compute (HPC) platform to run huge risk calculations, enabling Citi to leverage GenAI at scale, all the way to enabling payments solutions, this team is at the forefront of innovation.

What You’ll Do:

Technical Expertise: Provide hands-on technical contribution within a product team that focuses on public cloud container fleet management services, supporting Citi’s secure and enterprise-scale adoption of the public cloud.
Collaborative Development: Contribute to a team of cloud engineers and full-stack software developers, building and deploying solutions that advance the public cloud strategy.
Automation: Identify and develop automation initiatives to improve processes related to public cloud service consumption, enhancing client satisfaction and delivering business value.
Cross-Functional Partnership: Collaborate with teams across Citi’s technology landscape to ensure alignment between public cloud initiatives and broader business goals.
Engineering Excellence: Contribute to defining and measuring success criteria for service availability and reliability within the specific product domain.

Who You Are:

You are a talented developer with a proven track record of hands-on enterprise grade application development, expertise in public cloud, and a passion for engineering best practices. You have:

Development Expertise: Experienced in full-stack software development with a focus on AWS and GCP. Demonstrates hands-on software development and engineering expertise. Key areas of proficiency include:
- Programming Languages: Python, Java and Go.
- AI/ML: prompt engineering, LLMs, RAG, Semantic Search, Vector Databases, etc
- Behaviour-Driven Development (BDD) Testing: Cucumber, JBehave, Pytest-BDD, etc.
- CI/CD pipelines: Harness, Tekton, Jenkins, etc.
- Knowledge on middleware & distributed messaging (Kafka)
- Databases (MongoDB and SQL)
- Familiarity with Domain Driven Design and Event Driven Architecture
Agile and DevOps Mindset: Familiarity with Agile Development, DevOps, and SRE practices.
Adaptability: A demonstrated ability to quickly learn new technologies and adapt to changing project requirements.
Strategic Thinking: Experience evaluating complex requirements and rationalizing them into a consistent service offering.
Excellent Communication: The ability to effectively communicate technical concepts to both technical and non-technical audiences.
Exceptional Teamwork and Collaboration: A proven ability to contribute effectively within a cross-functional team environment.

What we can offer 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 ourGlobal Benefitspage 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:
Systems & Engineering ------------------------------------------------------
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.

Principal AI Engineer

About the Role

We’re seeking a Principal AI Engineer to lead the design and implementation of advanced AI solutions across our product and business ecosystem.

This is a unique opportunity to define and deliver an organisation-wide AI strategy — combining hands-on technical work with cross-functional influence to drive real impact.

You’ll work closely with senior technology and business leaders to shape how AI is embedded across products, operations, and internal processes. The role offers autonomy, scope, and visibility — ideal for someone who thrives at the intersection of deep technical expertise and strategic thinking.

What You’ll Do

Design, build, and deploy AI-powered systems and features that enhance product functionality and user experience.
Develop and integrate agentic frameworks, RAG pipelines, and vector database architectures to support natural language and intelligent automation use cases.
Fine-tune and customise LLMs (e.g. OpenAI, Anthropic, and other models) for specific business applications.
Collaborate with engineering and data science teams to implement MLOps best practices — from deployment and monitoring to continuous iteration.
Partner with commercial and operational teams to identify and automate processes that can be enhanced through AI tools.
Ensure responsible and secure use of AI through data governance, model guardrails, and compliance measures.

About You

Deep expertise in Python, machine learning, and data science.
Experience building, deploying, and scaling AI models in Azure and/or AWS environments.
Skilled in using LangChain, LangGraph, vector databases, and prompt engineering.
Understanding of LLM optimisation, including context extension and RAG-based frameworks.
Proven ability to collaborate cross-functionally and communicate complex AI concepts to non-technical teams.
A proactive, creative mindset — comfortable operating with autonomy to build scalable, production-grade AI systems.

Preferred qualifications:

Advanced degree (MSc/PhD) in Computer Science, Data Science, or a related STEM field.
Experience with Azure Foundry, AWS SageMaker, or other model-serving tools.
Prior exposure to SaaS, enterprise, or data-rich product environments.

Why This Role

Play a central role in defining and executing an organisation-wide AI roadmap.
Work directly with senior leadership on strategy and implementation.
Shape the next generation of intelligent, data-driven products.
Hybrid working environment with flexibility for deep technical focus and collaboration.
Competitive compensation and the opportunity to build at scale in a high-growth environment.

If you’re passionate about building intelligent systems that create measurable impact — this is your opportunity to lead from the front.

Senior DevOps Engineer - London Stock Exchange Group

London Stock Exchange Group

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.

ROLE PROFILE:

We’re looking for an experienced DevOps Engineer to support TRADEcho, our MiFID II reporting services, hosted on AWS and operated by the London Stock Exchange Group.

The team provides cover (onsite in Sri Lanka) from 2AM through to 6PM (UK Time) Monday to Friday with the late shift being performed by on call. There is occasional weekend work required as Saturdays are used to test and roll forward software releases.

WHAT YOU’LL BE DOING:

Act as operational SME for the product while also gaining a solid understanding of the underlying infrastructure and operations toolset
Act as the operational SME for the product, developing strong understanding of its infrastructure and tooling while partnering closely with business and technology teams.
Ensure full compliance with departmental processes, reducing incidents and risks through proactive analysis, accurate impact assessment, and support for development changes.
Identify and manage operational risks, mitigate short-term while driving long-term, sustainable resolutions.
Lead DevOps engineering within a cross-functional development pod, ensuring the platform is resilient, scalable, secure, and fully automated.
Own CI/CD pipelines and deployment automation, applying modern DevOps and GitOps practices to improve reliability and delivery speed.
Build and automate infrastructure provisioning using Terraform and configuration management tools, driving an automation-first culture and run the platform.
Mentor and provide technical guidance to DevOps engineers.

WHAT YOU’LL BRING:

Demonstrated AWS and Kubernetes expertise.
Hands-on experience with Terraform, CI/CD tools (Git, Jenkins, Ansible), and scripting (Bash/Python).
Ability to compose solutions for complex systems and guide teams on deployment best practices.
Excellent communication and problem-solving skills.

Preferred Skills & Experience:

Experience with modern tooling (DataDog, GitLab, ServiceNow), networking diagnostics, and Agile practices.
AWS certifications and financial services background.

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!

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.

Senior Software Engineer, FX Sales and Trading - Macquarie Group

Join our high performing eFX Digital Technology team supporting our front office projects in the Commodities and Global Markets Technology group and work with a multitude of teams and stakeholders to solve problems and deliver fit-for-purpose solutions.

At Macquarie, our advantage is bringing together diverse people and empowering them to shape all kinds of possibilities. We are a global financial services group operating in 31 markets and with 56 years of unbroken profitability. You’ll be part of a friendly and supportive team where everyone - no matter what role - contributes ideas and drives outcomes.

What role will you play?

You will join a high-performing team within the Commodities and Global Markets Technology group, where you will use your hands-on engineering expertise to design, build and enhance end-to-end electronic FX trading solutions. You will work closely with software engineers, business stakeholders and dependent technology teams as you deliver large-scale distributed systems that support a dynamic and fast-moving front-office environment. As a senior member of the team, you will guide technical decision-making, contribute to solution design and help ensure our platforms remain resilient, modern and aligned to strategic goals. You will collaborate across teams to resolve challenges, optimise performance and drive continuous improvement while deepening your understanding of digital trading products and the broader ecosystem.

What you offer

Hands-on software engineering experience with strong proficiency in Java and the full software development lifecycle in an agile environment.
Experience delivering large-scale, cloud-deployed systems, ideally with AWS, and familiarity with distributed architectures and DevOps practices.
Knowledge of electronic financial markets / eTrading
Ability to build effective relationships across technical and business teams, collaborating to deliver high-value solutions in a fast-paced environment.
Strong problem-solving skills with the ability to understand complex systems, diagnose issues and deliver timely, reliable outcomes.
Experience working with AI-enabled development practices will be an advantage.

We love hearing from anyone inspired to build a better future with us, if you’re excited about the role or working at Macquarie we encourage you to apply.

What we offer

At Macquarie, you’re empowered to shape a career that’s rewarding in all the ways that matter most to you. Macquarie employees can access a wide range of benefits which, depending on eligibility criteria, include:

1 wellbeing leave day per year and a minimum of 25 days of annual leave.
26 weeks’ paid parental leave for primary caregivers along with 12 days of paid transition leave upon return to work and 6 weeks’ paid leave for secondary caregivers
Paid fertility leave for those undergoing or supporting fertility treatment
2 days of paid volunteer leave and donation matching
Access to a wide range of salary sacrificing options
Benefits and initiatives to support your physical, mental and financial wellbeing including, comprehensive medical and life insurance cover
Access to our Employee Assistance Program, a robust behavioural health network with counselling and coaching services
Access to a wide range of learning and development opportunities, including reimbursement for professional membership or subscription
Access to company funded emergency and backup dependent care services
Recognition and service awards
Hybrid and flexible working arrangements, dependent on role
Reimbursement for work from home equipment

About Technology

Technology enables every aspect of Macquarie, for our people, our customers and our communities. We’re a global team that is passionate about accelerating the digital enterprise, connecting people and data, building platforms and applications and designing tomorrow’s technology solutions.

Our commitment to diversity, equity and inclusion

We are committed to providing a working environment that embraces diversity, equity, and inclusion. We encourage people from all backgrounds to apply regardless of their identity, including age, disability, neurodiversity, gender (including gender identity or expression), sexual orientation, marriage or civil partnership, pregnancy, parental status, race (including ethnic or national origin), religion or belief, or socio-economic background. We welcome further discussions on how you can feel included and belong at Macquarie as you progress through our recruitment process.
Our aim is to provide reasonable adjustments to individuals as required during the recruitment process and in the course of employment. If you require additional assistance, please let us know during the application process.

Principal AI Engineer - London Stock Exchange Group

London Stock Exchange Group

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.

ROLE SUMMARY:

The Principal Engineer is a senior technical expert responsible for designing, developing, and delivering high-quality software solutions.

This role emphasizes deep technical proficiency, innovation, and hands-on development, including advanced work in AI technologies such as prompt engineering and large language models (LLMs).

The ideal candidate will serve as a technical authority, proving concepts with the latest AI technology or practices in the form of a spike or proof of concept.

This person will be responsible for pushing the boundaries of what is possible, turning vision or concept into a technical solution, driving best practices and ensuring scalability, performance, and security across systems.

WHAT YOU’LL BE DOING:

Software Development

Design and implement complex, scalable, and secure applications.
Write clean, efficient, and maintainable code in Java, Python, and other high-level languages.

Technical Expertise

Provide architectural guidance and ensure adherence to best practices.
Optimize system performance and troubleshoot critical issues.

AI Development

Develop and refine prompt engineering strategies for LLM-based applications.
Integrate and optimize Large Language Models (LLMs) into products and workflows.
Collaborate with AI teams to improve model performance and user experience.

Innovation & Research

Stay current with emerging technologies, frameworks, and AI advancements.
Prototype and evaluate new tools and methodologies for adoption.
Collaboration
Work closely with product managers, QA, and other developers to deliver high-quality solutions.
Participate in code reviews and contribute to technical documentation.

Process & Quality

Advocate for automation, testing, and continuous integration practices.
Ensure compliance with security and regulatory standards.

WHAT YOU’LL BRING:

12+ years in software development, with a least a year in AI Development.
Extensive experience in software development and system architecture.
Proven ability to deliver complex projects with high technical standards.
Strong technical background in Java, Python, and/or other high-level programming languages.
Expertise in designing scalable and secure systems.
Hands-on experience with AI tools and frameworks, including:
- Prompt Engineering for LLMs (e.g., OpenAI GPT, Anthropic Claude).
- Model fine-tuning and deployment.
- AI integration into enterprise applications.
- Prompt management tools (Langfuse)
- Knowledge of vector databases, embeddings, and retrieval-augmented generation (RAG).
Experience with cloud platforms (AWS, Azure, GCP).
Familiarity with CI/CD pipelines and modern development tools.

Career Stage:
Manager