We are looking for a skilled Senior Frontend Developer with strong experience in TypeScript and React Native to join our development team. In this role, you will build scalable, high-performance web applications and work closely with cross-functional teams to deliver outstanding user experiences. This is initially a six-month contract with potential for extension. The role is hybrid, requiring one day per week in the London office, and is full-time at 40 hours per week. Key Responsibilities: Develop and maintain scalable, responsive applications using React.js, React Native, and TypeScript Work closely with UX/UI designers to deliver intuitive and engaging interfaces Write clean, efficient, and maintainable code following best practices Optimise applications for performance and scalability Participate in code reviews to ensure high development standards Troubleshoot and resolve issues across development and production environments Contribute to...

Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. Job Title: UI Developer Lead Location: Bromley - Hybrid ( 3 days in office) Contract: 12 months with possible extension. Rate: 850 inside umbrella Description: Highly skilled UI Developer to spearhead the development of the Single Dealer Platform within our Electronic Fixed Income Currencies business. The ideal candidate will have deep expertise in React, RxJS, and modern UI frameworks, combined with strong leadership and architectural skills to deliver high-performance, scalable, and intuitive trading interfaces. Key Responsibilities: Lead UI Development...

Shape your career with Citi in Dublin.   By   joining Citi, you will become part of a global organisation whose mission is to serve as a trusted partner to our clients by responsibly providing financial services that enable growth and economic progress.   Citi has had a presence in Ireland since 1965, it was one of the first foreign banks to open an office in the country and is the Citibank Europe Plc Headquarters.        Team Overview The Custody Transformation Team develops and migrates applications and services for Custody-related functionalities using a modern, cloud-native technology stack. We are seeking a Senior User Interface (UI) Developer with strong data and event-driven design skills to help implement our next-generation Custody technology platform. This is a delivery-focused role spanning design, engineering, implementation, and quality — with real ownership and impact from day one. Our distributed development team collaborates...

We are seeking an experienced Quantitative Developer to join the Numerical Performance Group (NPG), a central specialist team within Citi’s Markets Quantitative Analysis (MQA) organisation. NPG designs, develops, and deploys roots, Citi’s core high‑performance C++ numerical library. The roots library underpins pricing and risk infrastructure used across multiple asset‑class quantitative teams and is engineered for maximum accuracy and performance on modern hardware. The team works closely with front‑office quantitative groups and trading desks, tackling critical performance, scalability, and stability challenges across Citi’s derivatives pricing stack. Responsibilities Design, develop, and enhance quantitative libraries used for pricing and risk management Create, implement, and support quantitative models for the trading business using advanced mathematical and computational techniques Apply high‑performance computing methods, including hardware acceleration and...

Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of more than 230,000 dedicated people from around the globe. At Citi, you’ll have the opportunity to grow your career, give back to your community and make a real impact. Job Overview Engineer the future of global finance. At Citi, our Tech team doesn’t just support finance – we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech....

The Java  Developer - Assistant Vice President  is a  hands-on technical role within Prime Services Technology, responsible for designing, developing, and maintaining robust, scalable, and high-performance applications. This position requires a comprehensive understanding of the full software development lifecycle and the Prime Services business domain to deliver effective technology solutions for Prime Brokerage, Equity Finance, Delta One, and other related business lines. Prime Services Technology provides business solutions to Prime Brokerage, Equity Finance, Delta One, Futures Execution and Clearing, and OTC Clearing businesses. This person will be a hands-on technologist who will work on different data pipelines and collaborate closely with Prime Business Analysts, Quantitative Analysts, Traders to understand requirements. The role involves developing new data pipelines with a strong focus on Java and Python, and enhancing existing applications. While the role provides...

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 The Commodities trading business at Citi has grown significantly in the last 10 years to become one of the leading industry players. It is a federated business model that covers market-making across all types of assets including Oil, Gas, Power, Agriculture, Emissions, Metals, Freight, Exotics and Indices. This role is within the London Commodities Risk Technology team, focussing on our front-office trading platform. This proprietary trading platform is currently going through an exciting re-engineering phase and we are seeking to build out the development team. This front-office risk system calculates large volumes of results data, so there are considerable challenges...

Quant Developer – Trading Analytics – Equity Derivatives Tech 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. Equities Tech Equities Technology at Citi is undertaking a bold, multi‑year transformation to build a best‑in‑class global platform across execution, prime, clearing and cross‑product margining. We are re‑engineering our technology...

The Analytical Calculation Engine (ACE) Development Team is a group within Citi Financial Risk Technology, responsible for developing and implementing the applications used for derivatives credit risk and exposure calculations Firm-wide. The team's primary focus is the development, testing, deployment, and maintenance of the production derivatives credit risk application, used for internal risk management and regulatory capital purposes. The Counterparty Credit Risk Senior Application Developer position is a senior role that will interface closely with Quant and Front Office technology teams to integrate pricing models and workflow enhancements within the ACE application. There will be exposure to a wide range of technological frameworks, including distributed computing architecture. The role will involve tasks such as: Developing and maintaining the Counterparty Credit Risk applications, leveraging in-house Python and C++ model libraries. Supporting and...

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...

FX Risk Java Tech Lead   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. What We do / The Team Citi's Markets technology team is growing at lightning speed, and we're looking for talented technology leaders to help build the future of global banking. As the world's most global bank, Citi provides an opportunity to touch every corner of the globe...

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. Citi is seeking a highly motivated and curious full-stack engineer work embedded within the Systematic & Credit Portfolio Trading business and build out a first-class ecosystem of trading tools . This role offers a unique opportunity for in-person collaboration with traders, quants, and product...

C# Developer - Equity Derivatives Technology Risk (AVP) 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.  What We do / The Team  Equities Technology at Citi is undertaking a bold, multi‑year transformation to build a best‑in‑class global platform across execution, prime, clearing and cross‑product margining. We are re‑engineering our technology...

Senior Java Developer (Smart Order Router (SOR)) - Equities Electronic Trading 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.  What We do / The Team  Equities Technology at Citi is undertaking a bold, multi‑year transformation to build a best‑in‑class global platform across execution, prime, clearing and cross‑product margining. We are...

The Senior Java Developer is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology team. The overall objective of this role is to lead applications systems analysis and programming activities. Team Background The Derivatives Credit Risk Technology Team is responsible for delivering Counterparty Credit Risk Management software solutions to Citi’s Risk organization which manages Citi’s exposure to financial institutions, governments and corporates that trade with Citi. The team builds and maintains software used to compute metrics that help mitigate Citi’s exposure to counterparty default. The solutions include consumption of trades, collateral, market data, counterparty and security reference data from over 50 sources, and the computation of optimal margin allocation for portfolios and trades, haircut for security and cash collateral, trade and collateral liquidity, collateral...

C# Developer - Equity Derivatives Technology Risk (AVP) 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.  What We do / The Team  Equities Technology at Citi is undertaking a bold, multi‑year transformation to build a best‑in‑class global platform across execution, prime, clearing and cross‑product margining. We are re‑engineering our technology...

The Ab-Initio ETL Developer is an intermediate-level position responsible for the design, development, and implementation of robust and scalable data integration solutions. The successful candidate will be a key member of the Strategic Ledger program, a critical initiative focused on transforming upstream data into the CIT template for loading into Oracle Financials SaaS. This role is a core part of the Technology team, focusing on building and maintaining the firm's critical data pipelines using the Ab Initio platform. The overall objective is to contribute to high-quality data systems analysis and programming activities that support our strategic financial data objectives. Responsibilities: Design, develop, and maintain high-performance, resilient, and scalable ETL processes using the Ab Initio suite of products (GDE, Co>Operating System, EME) to transform upstream data into the required format for Oracle Financials SaaS. Conduct detailed data analysis, data profiling,...

Join a dynamic energy provider dedicated to sustainable solutions in the UK. We seek enthusiastic and resourceful Backend Python Engineers at senior levels who are passionate about crafting exceptional products. Initially it will be a six-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being based in their London. It is a full-time role, 37 hours per week. If this role feels right, send us your CV. Accountabilities: Playing a pivotal role in the backend engineering team, you will help to build full-stack cloud apps. You'll be using Python and AWS Cloud services on the backend. Adopt a Server-less first approach to application design, collaborating within an agile team alongside other backend engineers and product designers. Strategize, develop, test, and deploy new features and experiments. Engage in collaborative coding practices such as pair programming and code reviews within the team. Contribute to...

TransUnion's Job Applicant Privacy Notice What We'll Bring: We Are TransUnion: TransUnion is a major credit reference agency, and we offer specialist services in fraud, identity and risk management, automated decisioning and demographics. We support organisations across a variety of sectors including finance, retail, telecommunications, utilities, gaming, government and insurance. What You'll Bring: We're looking for a Software Developer to join our growing team. Day to Day You'll Be: Design and build reliable backend systems and infrastructure tooling Use TDD to write high-quality, maintainable code and build out automated test suites Own reliability, observability, and performance of key services Collaborate with clients to understand requirements, debug issues, and propose solutions Drive improvements to system architecture, automation, and deployment processes Mentor junior developers and contribute to a strong engineering culture Take ownership of...

Adecco is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. Are you a talented BPM Developer looking for an exciting opportunity in the banking industry? Our client is seeking an enthusiastic and skilled individual to join their team for a 6-month temporary contract. If you're ready to make an impact, we want to hear from you! Role: BPM Developer Duration: 6 Months (ext. options) Location: London (Hybrid, 3 days a week in office) Rate: 415 - 490 per day (umbrella) Your Role: As a BPM Developer, you will play a pivotal role in understanding business requirements and designing applications and workflows...