senior java developer jobs in London

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...

Senior Ruby on Rails Engineer 600/day Inside IR35 | 6 Months | Predominantly RemoteWe are seeking a Senior Ruby on Rails Engineer to join a large-scale content transformation programme.Have you got what it takes to succeed The following information should be read carefully by all candidates.This role goes beyond development, requiring someone who can lead...

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...

Citigroup in London is seeking a Senior Low Latency Java Engineer to lead Java-based, low-latency systems within the High Performance Architectures (HPA) team. You will work on algorithmic trading utilities, market data handling, and event-sourcing microservices while mentoring junior engineers and driving performance improvements.The role focuses on...

Thomson Keene's client, a Global Investment bank, is delivering a new centrally automated platform for its Prime technology division. You will join a globally distributed team and contribute to building scalable, event-driven services using Java, Spring and Apache tooling.The stack includes Java, Spring, Flink, Kafka, Ignite and Angular. The role requires...

JP Morgan Chase in London seeks a Senior Lead Software Engineer to design, build and improve scalable client-facing capabilities for J.P. Morgan Online International.You will contribute hands-on code, mentor engineers and guide complex technical decisions within Asset & Wealth Management’s IT organisation. You will work with cross-functional teams to...

Source Group International is seeking a Senior Tech Lead / Senior Camunda and Java Software Engineer to drive a Camunda to CIBseven migration in a large enterprise. You will architect and develop Java 17+ microservices while mentoring the team and guiding DevOps practices.The role is fully remote, with collaboration across Agile teams to deliver high-quality...

Luxoft, part of DXC, is assembling a high-impact FX Clearing squad in Bucharest to deliver the FX Swaps product within Global Clearing Solution. You will join an agile team, work on low-latency, high-throughput Java/Spring Boot microservices, and contribute to design, development, testing and production rollout across the full SDLC.The role emphasizes...

Rightmove is hiring a Senior Backend Engineer in London to design and deliver scalable features for our platform. You will work with Java 17+, Spring Boot, and a modern tech stack to empower millions of users and thousands of agents.The role emphasizes ownership, collaboration, and performance improvements within a hybrid, office-plus-remote setup. You will...

Citi's Equities Derivatives Technology team seeks a hands-on Senior Developer to build front-office applications for pricing and trading with critical market data. You will contribute to modernizing the stack, container migration, and AI-assisted development practices.Role emphasizes technical leadership, end-user collaboration, and delivering scalable,...

Select how often (in days) to receive an alert: Senior Software Engineer, Full-Stack Applications (Java) Requisition ID: 50948 Business Unit: Fitch Group Category: Information Technology Location: London, GB Senior Software Engineer, Full-Stack Applications - AI Fluent Fitch Ratings is seeking a Senior Software Engineer to join our global Ratings Technology...

Wise in London is seeking a Senior Software Engineer to own backend services for Cash Management. You’ll design, build, test and operate scalable systems that move money between partners and customers, with an emphasis on reliability and observability.Collaborate with product managers and partner banks to shape the payments journey, apply domain-driven...

Radley James is seeking a Senior Software Engineer to help build a next-generation Futures & Options Execution Management System (EMS) from scratch in London. The role sits in Front Office Trading Technology and partners with traders and product teams.You will design and implement low-latency, cloud-native services, focusing on exchange connectivity and...

Rapinno Tech Solutions GmbH in London seeks a senior patching and lifecycle maintenance specialist to manage OS, middleware, and Java platform upgrades across UNIX/Linux environments. You will drive security hardening, vulnerability remediation, configuration management, and rolling upgrades while maintaining compliance with change control processes.Leads...

Skillfinder International is seeking a Java Developer to join a low-latency trading systems team in London. You will design and build high-performance Java applications, optimise memory and CPU usage, and contribute to a platform serving EMEA and US markets.Candidates should have deep JVM tuning, concurrency and memory management expertise, and hands-on...

IO TECH SOLUTIONS LIMITED in London is seeking an experienced Java Engineer to join a team building high-performance, low-latency trading systems for a leading digital asset firm. You will tackle complex problems in a fast-paced environment, delivering robust software for real-time markets and crypto trading.You will work on low-latency pricing, market...

A leading health retailer in London is seeking a Senior Backend Engineer to develop tools that enhance store design and optimize customer experiences. The role involves designing scalable backend services using Java and Spring within a hybrid working environment. Strong experience in backend development, API management, and databases is essential. This...

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people.Want to make an application Make sure your CV is up to date, then read the following job specs carefully before applying.The Elastic Search AI Platform, used by more than 50% of the...

Salary: £65,000-£75,000 + Company Car Location: West London | UK & International Travel Hours: Predominantly Monday-Friday | Around 40 hoursLove food development, but equally good at making the whole process actually happen?I'm recruiting a Senior Development Chef for a major premium food and hospitality business, working across culinary development,...

Areti Group | B Corp™ is urgently seeking a full-stack Software Developer to join a UK Government digital programme supporting frontline public services. You will build back-end APIs in Kotlin and Spring Boot and deliver rich front-ends using TypeScript, Express and Nunjucks, aligned with the GOV.UK Design System.The role requires active SC clearance and...