Full Stack Engineer Jobs in London

MS Dynamics Developer (Power Automate / D365 Finance & Operations) London, UK | Mid‑Level | Security Clearance Required I’m excited to share a new opportunity for a Dynamics 365 Finance & Operations Developer to join a growing, innovative environment where you’ll work across the full lifecycle of D365 F&O and Power Platform solutions. This position is ideal for someone who thrives in a hands‑on technical role and enjoys collaborating with business and technical teams to deliver high‑quality ERP and automation solutions.
You’ll be responsible for: - Customising and configuring Dynamics 365 Finance & Operations using Visual Studio, LCS, UDE, PPAC, X++, C# and extension models

Supporting all phases of the D365 F&O implementation lifecycle
Enhancing key modules such as Procurement, Vendor Management, General Ledger, Budgeting, Payments, and Travel & Expense
Developing integrations using Power Automate, Dataverse, APIs, and virtual tables
Building automated workflows, approval pipelines, and compliance‑driven logic
Designing and maintaining Data Entities and DMF pipelines
Creating low‑code solutions in Power Apps and exploring emerging AI capabilities
Maintaining system documentation, performing code reviews, and providing 3rd‑line support
Collaborating with finance, procurement, and operational teams to translate real‑world processes into scalable system logic. Further Details - OUTSIDE IR35 - Hybrid working model is available (Office London & Home) - £486.00 per day. If you’re interested in this role please send your CV to (url removed)

Power Platform Developer

3 Months
5 Days per week on site in Canary Wharf
(Apply online only) per day (Inside IR35

My client, in the financial services industry, are looking for a Power Platform Developer to join their fast-paced team on an initial 3 month contract based out of Canary Wharf on a fully on-site basis where the selected candidate will be required on site 5 days per week.

This role requires a technically strong individual who can act as a technical lead.

Requirements for this role-

Strong experience with Power Automate.
Experience with Oracle data sources and database design.
Power BI experience is a nice-to-have.
Basic SharePoint navigation and usage skills.
Experience building Copilot solutions is a plus.
API integration experience across Microsoft technologies.
Azure experience, including pipelines for deployment.
Ability to communicate clearly with team members and stakeholders.
Scripting experience with Java, PowerShell, and JSON.
Teams is working across multiple platforms and domains, including back office, middle office, lending, and compliance.

Disclaimer:

This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited (“ARM”). ARM is a specialist talent acquisition and management consultancy. We provide technical contingency recruitment and a portfolio of more complex resource solutions. Our specialist recruitment divisions cover the entire technical arena, including some of the most economically and strategically important industries in the UK and the world today. We will never send your CV without your permission. Where the role is marked as Outside IR35 in the advertisement this is subject to receipt of a final Status Determination Statement from the end Client and may be subject to change.

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

Python Engineer- Global Quant Firm

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

Python Developer Tools Engineer- World-Leading Prop Trading Fund

Salary: £200k base + bonus

Summary:

Exciting opportunity to work at a tech-centric prop trading fund which trades a wide range of financial products, with offices across the globe. Work is organized into small, project-oriented teams, each with the independence and responsibility to make decisions that impact the business.

Python is their go-to language for data analysis, visualization and machine learning; you’ll join the team responsible for the tools that support the Python work, such as CI for test running and static analysis and automation around the deployment of Python environments & apps.

Seeking skilled engineers with experience building Python tooling at large scale who are looking for a wide-ranging role that involves both technical and product design challenges.

The successful candidate will be a smart, curious software engineer who enjoys finding solutions for complex problems. If you also have a great appetite for learning new things, this role is for you!

Requirements:

Substantial Python tooling development experience, plus a desire to learn other languages
Experience building a system responsible for multiple languages is important
Thorough understanding of Python tools and libraries, keen to offer advice on best practices
Outstanding communication skills, able to understand user requirements and design appropriate solutions

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

Benefits and Incentives:

Substantial and varied range of project work
Market-leading compensation
Great company culture, including relaxed dress code, huge emphasis on work-life balance, learning outside of the workplace
Collaborative and innovative environment where each person has the opportunity to make a significant impact

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

C++ Senior Software Developer - London- Prop Trading Firm

Salary: £200k + bonus

Summary

Join a sophisticated technology team in the London office of a prop trading house that places software development at the centre of business strategy. This team have the responsibility of a trading group and a core infra team.

This role is for a senior engineer who is able to take on problems at all levels of the software stack, including low-level code to drive network hardware, super reliable high-performance trading infrastructure and time-saving internal tools. You will be taking ownerships of projects and writing production code from day one.

Working collaboratively alongside the traders, this is very much a hands-on role with a real impact on improving people’s daily work. The development team enjoys great flexibility when planning roadmaps and deciding which features to implement.

Requirements

BS in Computer Science or Computer Engineering (or equivalent experience)
Expert-level experience programming in C / C++11/17/20/23 and Python
Previous finance experience, or other significant hands-on development
Linux guru
Ability to juggle a lot of priorities and continuously deliver
Interest in finance / machine learning / big data and/or robotics are pluses

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

Benefits

Vibrant, flexible and inspiring work environment with excellent rewards
They’re willing to be flexible with WFH
Free food / gym onsite

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

Core UI / Web Platform Engineer- Global Quant Firm

Salary: up to £200k base

Summary

Leading HFT fund looking for an experienced Front End Developer to join their core UI platform team.

This is a high impact role where your primary focus is building and extending the core UI platform, using it to develop business-critical applications. You’ll collaborate extensively with a wide variety of teams, helping them use the platform to build their own applications. You’ll aim for simplicity where possible, but you’ll also build cutting-edge UIs when required.

The successful Web Platform Engineer will be comfortable within the modern web development environment (tools & techniques), with a deep empathy for the developers who’ll use your platform, always looking for improvements to increase their productivity.

Requirements

Minimum 4+ years of professional experience building web-based UIs
Extensive experience with React, Typescript, WebSocket protocols, REST, and UI unit-testing
Very comfortable working in a highly agile, collaborative methodology (sprints, pair-programming, testing, estimation, etc.)
Bonus points for Kubernetes, Helm, containers, CI/CD pipelines and/or experience working in trading / finance

NB: Please don ’ t apply if you are 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

Production Software Engineer- Global Quant Firm

Salary: up to £200k + bonus

Summary

Leading HFT fund looking for pragmatic Python engineers to join their Production Engineering group in their agile, London-based application team.

This role offers the opportunity to work directly with users, building clean, easy-to-use solutions for complex real-world problems. You’ll be involved in every aspect of software engineering, from understanding users’ needs and gathering requirements, to system architecture design and coding. You’ll also be exposed to a wide range of technologies: Python and Go to build application back-ends, Django/Flask/Dash/React for the front ends, and others including Kubernetes, Kafka, and more.

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 love working on technically challenging problems, learning new things in a collaborative, supportive environment, this role would be perfect for you.

Requirements

Minimum 2+ years’ experience
Strong hands-on Python programming experience, keen to learn new technologies
Good understanding of Linux administration
Passionate about writing quality, testable code
Skilled at managing priorities, able to switch between multiple projects at once
Bonus points for trading industry experience

NB: Please do not apply if you are 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
Unique culture where you can fulfil your potential through collaboration and mutual respect

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

FX Client & Prime - Software Engineer (VP) - Citi

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
FX Client & Prime - Software Engineer (VP)

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.

About Citi
As the world’s most global bank, Citi gives you the tools to be a trailblazer. We’re not just building technology; we’re building the future of banking. With thousands of employees located around the globe, we are an international team encompassing a broad range of teams, roles, and cultures, and we invite you to come and join us!
Citi’s technology team supports business operations in 100+ countries, across multiple lines of business spanning both Institutional and retail businesses.
The group works to optimize the IT environment by standardizing production platforms, reducing complexity, and introducing innovative solutions that provide new business capabilities, reduce total cost of ownership, and create a competitive advantage for Citi.
We want to regularly engage with talented individuals who are passionate about producing clean, testable code as part of a high performing team. We have found this to be way more important than experience in the financial sector.
We welcome applications from any industry and should you wish to apply your application will be reviewed for a multitude of Developer positions at varying levels.

About FX Tech
Citi FX has a physical presence in 83 countries with 1,400 dedicated staff giving us the largest FX presence of any bank globally. Foreign Exchange has been one of the defining businesses of Citi for much of its 200 year existence.
Citi has the largest FX presence of any bank globally and we proudly put this down to delivering unrivalled service and insight to our clients. Increasing investment in technology has seen us roll out award winning applications. Technology is a central pillar for our plans to sustain and grow our FX business.
Above all, we seek individuals who seek exceptional attitude and aptitude in the people they work with and have a demonstrated passion for delivering FX technology in support of our #1 FX business.

Role Overview/What will you do:

Hands on technical implementation of FX trading systems
The successful candidate will work with teams across FX Technology implement solutions that benefit the business
The role does not involve budget responsibility
Drive the design and development of system architecture, work with end-users of the systems, and enhance the quality of deliverables Ensure staff follows Citi documented policy and procedures as well as maintain desktop procedures and supporting documentation for filings on a current basis and in comprehensive manner
Contribute to defining and implementing best practices and processes for the department and ensure transparency and consistency across teams
Work directly with trading and quant teams

Key Skills and Experience required

Proven understanding of FX highly preferred
Understanding of low-latency development practices
Proven track record of building new systems, replacing legacy systems and renovating existing systems
The candidate will have systems (software, hardware, networks) knowledge required to define solutions and trouble shoot issues
Exceptional communicator who loves working with people, confident communicating at all levels from an individual team to the entire enterprise
Highly credible hands on engineer, confident to deep dive into a product and codebase and offer detailed, constructive analysis and feedback
Awareness of industry trends and leveraging new technologies as appropriate

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

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.

FX Prime Brokerage Developer VP - (FX Prime) - Citi

Job Overview
FX Prime Brokerage Developer VP - (FX Prime)

Citi’s technology team supports business operations in 100+ countries, across multiple lines of business spanning both Institutional and retail businesses.
The group works to optimize the IT environment by standardizing production platforms, reducing complexity, and introducing innovative solutions that provide new business capabilities, reduce total cost of ownership, and create a competitive advantage for Citi.

We want to regularly engage with talented individuals who are passionate about producing clean, testable code as part of a high performing team. We have found this to be way more important than experience in the financial sector.
We welcome applications from any industry and should you wish to apply your application will be reviewed for a multitude of Developer positions at varying levels.

Role Overview/What will you do:

Hands on technical implementation of FX trading systems
The successful candidate will work with teams across FX Technology implement solutions that benefit the business
The role does not involve budget responsibility
Drive the design and development of system architecture, work with end-users of the systems, and enhance the quality of deliverables Ensure staff follows Citi documented policy and procedures as well as maintain desktop procedures and supporting documentation for filings on a current basis and in comprehensive manner
Contribute to defining and implementing best practices and processes for the department and ensure transparency and consistency across teams
Work directly with trading and quant teams

Key Skills and Experience required

Proven understanding of FX highly preferred
Understanding of low-latency development practices
Proven track record of building new systems, replacing legacy systems and renovating existing systems
The candidate will have systems (software, hardware, networks) knowledge required to define solutions and trouble shoot issues
Exceptional communicator who loves working with people, confident communicating at all levels from an individual team to the entire enterprise
Highly credible hands on engineer, confident to deep dive into a product and codebase and offer detailed, constructive analysis and feedback
Awareness of industry trends and leveraging new technologies as appropriate

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

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.

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.

Full Stack Developer- Innovative Algo Trading

This is one of the world’s top algorithmic trading firms, looking for an experienced full stack developer to architect and design enhancements for global web-based systems using mainly Python and React.

Working closely with teams across the firm - Algo, Business Development, Middle Office, Trading Tech - your code will impact business logic, provide user-friendly interfaces, and increase the quality of the web-based infrastructure. You’ll be responsible for understanding end-user requirements, creating full-stack applications, expanding existing infrastructure and identifying opportunities for improvement.

Requirements

3+ years of software development experience, including strong Python programming skills
Solid Javascript/Typescript experience on a modern web framework (preferably React)
Minimum bachelor’s degree in Computer Science, Engineering (or related field)
Excellent multitasking and time management skills
Top-notch communication skills, able to explain complicated topics to technical and non-technical stakeholders

Benefits and Incentives

Market-leading salary + bonuses + generous benefits package
Friendly, informal yet highly rewarding work culture
Work with the latest technologies on complex problems with significant impact
Feel valued and be rewarded for your hard work where coding is front and centre

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/

Full-Stack Product Engineer- Innovative AI Start-Up

Salary: £60 - 80,000 base + substantial stock

Summary:

Fantastic opportunity for a Product Engineer who thrives on project ownership to join a growing AI-auditing tech firm.

Founded in 2023, and backed by some big-name investors, my client has built a trusted platform for safe and responsible deployment of AI systems. Their continuous auditing of AI models ensures transparency, independent oversight and fairness in HR and HR tech.

Reporting to the CTO and working collaboratively with product, data & customer-facing teams, this role offers the chance to work across the full stack with a visible impact on product quality, functionality and reliability. You’ll draw on your solid TypeScript and React background to strengthen product development capabilities, and contribute to backend systems in Python.

As an early product engineering hire, you will help shape the scope of how this role grows and take on more responsibility across product development. Currently an intentionally small, focused company of five people, they are looking to grow to 10 by mid-2026. Come and be a part of something special.

Skills and Experience Required:

3+ years’ professional experience, with strong TypeScript and React skills (Next.js is a plus)
Experience shipping production software that real users depend upon
Strong desire to design reliable, performant, user-friendly features
Full-stack mindset, happy to work across both front- and backend
The ability to make trade-off decisions; knowing when to move fast and when to build something more robust
Comfortable in fast-paced, early-stage environments where you wear multiple hats

Rewards and Incentives:

Join a fast-growing, agile, diverse company, passionate about innovation
Hybrid working - 3 days/week in London office
Generous holiday allowance & budget for personal learning & development

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’re suitable for this role, want to hear about similar positions, or would like help hiring similar people for your company, please send your CV or get in touch.

Richard Allan
richard.allan@oxfordknight.co.uk
+44 (0) 20 3137 9574
linkedin.com/in/richardallanok

Java HFT Developer- Leading Quant-Driven Market-Maker

Salary: up to £200k base + bonus

Summary

Tech-savvy algorithmic trading firm looking to hire a Java Developer to help develop and operate the off-exchange trading system and products. This is a superb opportunity for a well-organised and pragmatic engineer with a passion for concise, efficient code to join one of the only Java teams you will find in HFT.

A high impact role, you will be maintaining and extending the JVM-based networking platform in order for it to integrate with new trading venues and adapt to new asset classes. You’ll also be implementing new cross-asset pricing features.

The successful candidate will be an expert in Java development - your in-depth understanding of the inner workings of modern JVMs will be invaluable, particularly around performance optimisation.

Requirements

3+ years’ professional experience of writing Java and/or Kotlin
Strong testing skills and understanding of its importance
Proactive and adept at managing multiple projects
Highly numerate, with fantastic problem-solving skills
Finance experience NOT necessary
Ideal candidate would have some UI experience, preferably React

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

Benefits

Competitive compensation package
They’re willing to be flexible with WFH
Challenging work within a truly flat structure; ideas from everyone are encouraged and evaluated
Very direct impact on the PnL, with very little bureaucracy
Generous benefits package, including life & health insurance, pension, onsite gym, yoga, climbing wall, pool & table tennis and regular staff social events

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

KDB Developer - eFinancialCareers

Role: KDB Developer Location: London Rates : Flexible Start Date: ASAP About the role: The successful candidate will be an experienced ‘hands on’ KDB developer. Prior experience of distributed systems and statistical analysis is desired. The ability to react quickly to business changes and liaise with a variety of front office technology colleagues. As part of a global team the successful candidate will also be responsible for making business and regulatory driven changes. Skills: • Experience with KDB/Q • Technical design skills that focus on code reuse and ease of maintenance • Excellent troubleshooting, unit testing, and problem-solving skills • Experience with Java and JavaEE applications • Experience with JSCRIPT and Web UI technologies is a big plus • Previous exposure to equities and equities trading flows is a big plus • Previous exposure to Microsoft Azure or other cloud technologies a plus • Previous experience with Fitnesse, Automated testing tools, GITLAB & ServiceNow is a plus This role is advertised via Hays

Public Cloud - Forward Deployed Engineer (VP) - Citi

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.

FX Client & Sales Technology - Senior Software Engineer (SVP) - Citi

Job Overview
FX Client & Sales Technology - Senior Software Engineer (SVP)

Role Overview/What will you do:

Hands on technical implementation of FX trading systems
The successful candidate will work with teams across FX Technology implement solutions that benefit the business
The role does not involve budget responsibility
Drive the design and development of system architecture, work with end-users of the systems, and enhance the quality of deliverables Ensure staff follows Citi documented policy and procedures as well as maintain desktop procedures and supporting documentation for filings on a current basis and in comprehensive manner
Contribute to defining and implementing best practices and processes for the department and ensure transparency and consistency across teams
Work directly with trading and quant teams

Key Skills and Experience required

Proven understanding of FX highly preferred
Understanding of low-latency development practices
Proven track record of building new systems, replacing legacy systems and renovating existing systems
The candidate will have systems (software, hardware, networks) knowledge required to define solutions and trouble shoot issues
Exceptional communicator who loves working with people, confident communicating at all levels from an individual team to the entire enterprise
Highly credible hands on engineer, confident to deep dive into a product and codebase and offer detailed, constructive analysis and feedback
Awareness of industry trends and leveraging new technologies as appropriate

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

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

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 Developer - PIMCO

We are a leading global asset management firm with over 3,000 employees across 20 offices in 15 countries; we help millions of investors around the world pursue their financial goals.

We hire critical thinkers. People who thrive in a collaborative culture like ours where we solve real problems while building the future of finance.

You

Are excited to be part of a vibrant engineering community that values diversity, hard work, and continuous learning.
Love solving complex real-world business problems.
Recognize that cross-functional collaboration is a core component of success for the team.
Believe there are multiple ways to solve most technical problems and are willing to debate the trade-offs.
Have become a stronger engineer by making mistakes and learning from them.
Are a doer, someone who wants to grow their career and gain experience across technologies and business functions.

Continuously invest in a high-performance and inclusive culture, in which a diversity of backgrounds, experiences and viewpoints are celebrated and valued.
Encourage career mobility, so you can benefit from learning different functions and technologies, and we gain the benefits of your experience across teams.
Run technology pro bono programs that help the non-profit community and give our engineering community opportunities to volunteer and participate.
Offer education reimbursements and ongoing training in technology, communication, and diversity & inclusion.
Embrace knowledge sharing through lunch-and-learns, demos, and technical forums.
Consider our people to be our greatest asset-we will help you learn what PIMCO Technology has to offer so you can participate in activities that benefit your career while delivering impactful technology solutions.

Project Overview

Our middle office transformation initiative will completely transform our business workflows by delivering efficiency across processes, providing our investment teams with more accurate and timely access to positions, P&L, and performance. In this role, you will:

Responsibilities:

Platform Development and Management

Build and maintain supporting components, including data infrastructure and reporting tools within the middle office ecosystem.
Ensure high performance and scalability through best practices in software architecture and rigorous testing protocols.
Provide Level 3 support for middle office applications.

Collaboration & Stakeholder Engagement

Work closely with Portfolio Managers & Operations to gather requirements and provide technical solutions.
Translate various financial asks into tangible, production-quality software.

Code Quality & Best Practices

Uphold industry best practices in coding, design patterns, and application development.
Mentor junior team members and perform code reviews to maintain high-quality standards.

Requirements:

BS/MS/PhD in Computer Science, Mathematics, or a related technical field.
4+ years of hands-on software development experience in Java and Python
Experience in developing cloud-ready, distributed, large-scale, data-intensive applications
Strong understanding of data structures, algorithms, OOP, and design patterns
Experience with data modelling, relational and NoSQL databases, and RESTful APIs.
Experience with Kafka and other real-time messaging systems
Experience with distributed caching technologies such as Memcached, Ignite, etc.
Proven experience in database development and SQL
Deep financial knowledge of transactions, positions, P&L, or performance management.
Experience working in a fast-paced, dynamic environment
Familiarity with cloud platforms (e.g., AWS) and data warehousing solutions (e.g., Snowflake) is a plus

Equal Employment Opportunity and Affirmative Action Statement

PIMCO recruits and hires qualified candidates without regard to race, national origin, ancestry, religion (including religious dress and grooming practices), sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), sexual orientation, gender (including gender identity and expression), age, military or veteran status, disability (physical or mental), any factor prohibited by law, and as such affirms in policy and practice to support and promote the concept of equal employment opportunity and affirmative action, in accordance with all applicable federal, state, provincial and municipal laws. The company also prohibits discrimination on other basis such as medical condition, or marital status under applicable laws.

Applicants with Disabilities

PIMCO is an Equal Employment Opportunity/Affirmative Action employer. We provide reasonable accommodation for qualified individuals with disabilities, including veterans, in job application procedures. If you have any difficulty using our online system due to a disability and you would like to request an accommodation, you may contact us at 949-720-7744 and leave a message. This is a dedicated line designed exclusively to assist job seekers with disabilities to apply online. Only messages left for this purpose will be considered. A response to your request may take up to two business days.

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

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.

Java Developer e-Trading - eFinancialCareers

Job Role: Java Developer e-Trading

Location: London Hybrid

Rate: Flexible

Start Date: ASAP

Your role

We are seeking an experienced candidate to join our eFX Quantitative Developer team within Global Markets
This is a fast paced and collaborative team that are responsible for the development and enhancement of the best-in-class eFX platform
The team sits within the Global Markets Principal Flow Trading stream, and has a business reporting line
You will be operating within a high-performing, fast paced quant development team, whose goals are directly aligned to the success of the business
You will take ownership of initiatives from initial analysis through to design, implementation and delivery
You will proactively suggest and drive through improvements to the platform and our framework
You will be involved in every aspect of algorithmic trading:
Market connectivity
Designing, implementing and back-testing pricing and execution strategiesDesigning and building analytics to assess model and platform performance
Latency analysis and optimisation
Enhancing the proprietary eTrading framework that is used across the department

Your team

A highly technical and innovative quant development team leading automated trading in FX
Part of the Principal Flow Trading Quant Development department, alongside teams aligned to eRates, eCredit, FX Derivatives, Equity Derivatives, and Cash Equities
Focused on maximising automation and performance in order to drive eTrading revenues
Operating in a highly agile manner, releasing to production multiple times per day

Your expertise

Strong business knowledge of electronic trading, ideally eFX
Proven experience in designing and implementing low-latency, high-throughput, event-driven algorithmic trading platforms
Collaboration with quantitative analysts to design and implement algorithmic trading models and controls
Experience of producing model documentation and partnering with governance and second line of defence functions
Advanced Java programming skills including approaches to low-latency Java like lock free data structures and low-garbage programming techniques
Beneficial to have low level experience with messaging libraries and protocols including Aeron, Kafka, EMS, SBE, FIX, ITCH, OUCH
Familiarity with time-series databases (preferably KDB) and Python for building analytics and reports
Full stack development experience is an advantage (preferably React) particularly for building monitoring dashboards and trader-facing tools

This role is advertised Via Hays

Junior Software Engineer - C# - Up To £400 Per Day - London - Hybrid

Role: Junior Software Engineer Workplace type: Hybrid Location: London Employment type: Contract Seniority : Junior (1–3 years’ experience) We’re partnering with an established, innovation-led organisation to hire a talented Junior C# Developer to join their growing engineering team. This is a fantastic opportunity for an ambitious early-career software engineer who wants to build real-world systems, work alongside experienced developers, and develop robust, scalable applications used in complex environments. You’ll be joining a collaborative, high-performing team where software engineering best practices, clean architecture, and continuous learning are genuinely valued. If you have a strong academic background in Computer Science (or similar), solid foundations in C#, and a genuine passion for building well-designed software — this could be the ideal next step. What You’ll Be Doing: Designing and developing clean, maintainable code using C# and the .NET ecosystem Contributing to the development of scalable backend services and APIs Supporting the evolution of system architecture and improving existing codebases Writing unit and integration tests to ensure high-quality, reliable software Participating in code reviews and collaborating closely with senior engineers Requirements: 1–3 years of commercial experience working with C# and .NET Strong academic background in Computer Science, Software Engineering, or a related technical discipline Solid understanding of object-oriented programming principles Familiarity with REST APIs and backend service development Understanding of relational databases (e.g., SQL) This is an exciting opportunity for a motivated junior developer who wants to accelerate their career in a technically strong environment and make a real contribution from day one. If you’re ready to take the next step and grow into a well-rounded software engineer, we’d love to hear from you.

Tech Lead – Python / Financial Modelling / AI - Pensions

Tech Lead – Python / Financial Modelling / AI - Pensions £650 – £750 per day Outside IR35 6 Month Contract Remote (Occasional London Travel) Overview I’m currently working with a leading financial services technology consultancy that is looking to bring in an experienced Tech Lead to support the delivery of modern software solutions for a major pensions client. This role sits at the intersection of financial modelling and modern engineering, supporting the development of platforms used for forward-looking financial analysis, including discounted cashflow projections and Monte Carlo simulations. This is a hands-on leadership role, splitting your time between full-stack engineering and leading a team of senior developers. You’ll also play a key role in shaping AI-assisted and agentic development workflows, helping embed these approaches into day-to-day engineering practices. The Role You will lead a team of four experienced engineers while remaining actively involved in the development process, with a strong emphasis on Python-led development within a modern cloud environment. Alongside technical leadership, you will coordinate delivery, run Agile ceremonies, and act as a key technical contact for stakeholders and clients. The role requires someone who leads by influence, communicates confidently with clients, and brings practical experience implementing AI-assisted and agentic engineering workflows within real delivery environments. Key Responsibilities Leading a team of four senior engineers within an Agile delivery environment Remaining hands-on with Python-led full-stack development, alongside TypeScript, React and Azure Contributing to platforms supporting financial modelling and forward-looking analytics including discounted cashflow projections and Monte Carlo simulations Championing AI-assisted and agentic engineering workflows, embedding these into development practices Running Agile ceremonies including stand-ups, sprint planning and retrospectives Managing day-to-day delivery and proactively removing blockers Acting as a key technical contact for stakeholders and clients Supporting solution design and maintaining strong engineering standards Experience Required Proven experience operating as a Tech Lead or Lead Engineer in modern engineering teams Strong Python development experience within full-stack environments Experience with TypeScript, React and Azure-based architectures Experience working on financial modelling systems, ideally involving forward-looking modelling such as discounted cashflow projections or Monte Carlo simulations Demonstrable experience implementing AI-assisted or agentic engineering approaches in practice Experience leading engineering teams within Agile delivery frameworks Strong communication skills and the ability to engage confidently with clients and stakeholders A solutions-oriented, detail-focused mindset with a strong delivery drive and principles-based approach to engineering

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Frequently asked questions

London offers a wide range of Full Stack Engineer positions across various industries, including finance, tech startups, healthcare, and e-commerce. Roles vary from entry-level to senior positions, often requiring experience with popular front-end and back-end technologies.

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You can create a profile on our platform, upload your CV, and search for Full Stack Engineer roles in London using our filters. Once you find suitable jobs, you can apply directly through the job board with a single click.

Yes, many employers in London offer remote or hybrid working options for Full Stack Engineers. You can filter your job search by location or work type to find roles that suit your preferences.

Salaries for Full Stack Engineers in London vary based on experience and company size but generally range from £45,000 to £90,000 per year. Senior or specialized roles can offer higher compensation.