senior java developer jobs in London

ioTech Solutions in London seeks experienced Java engineers to join a leading digital asset firm building next-generation crypto trading systems. The role focuses on high-performance, low-latency trading technology with strong core Java skills and extensive concurrency knowledge.Ideal candidates will have 10+ years of software development, Unix/Linux...

Zepz in London seeks a Senior Backend Engineer to build scalable services that detect and prevent financial crime across WorldRemit and Sendwave. You will own design, reliability, and cross-team collaboration, shaping the tech that underpins regulator-facing systems.You’ll combine strong Java/Spring experience with Kafka, PostgreSQL, and AWS, while...

The Team Citi's Equities Derivatives Technology department is investing in front-office development to support the Derivatives Flow, Delta One, and Exotics desks. We are looking for a hands-on Senior Developer to build applications to help desks manage critical market data used for their derivatives products pricing and trading. The Team Citi's Equities...

Broadridge Financial Solutions seeks a Senior Full Stack Developer to join the AI Enablement Team. You will design, develop, and enhance AI-enabled platforms with a focus on GenAI, vector stores, RAG, and context engineering.The role requires leadership, collaboration with architects, and delivering scalable software solutions. The ideal candidate has 7+...

🚀Senior Full Stack Engineer – Java/Kotlin&React 📍London | Hybrid 🏦Tier 1 Investment Bank | Prime Finance We are partnering with a Tier 1 investment bank on a major, multi-year transformation of its Prime Finance Equities platform. The Equity Accelerator programme is re-engineering core trading and post-trade systems, replacing legacy...

JUXT is seeking a Senior Full Stack Engineer to join a Tier 1 investment bank transformation. You will build Java/Kotlin event-driven services and React/TypeScript applications that power live, financially critical systems.You’ll modernise legacy trading and post-trade platforms, design for failure, data integrity and replay, and work across Kafka,...

Senior Full Stack Developer with Java/JavaScript/TypeScript and Reusable UI Component Development - Duration: 12 MonthsLocation: Toronto, London or Winnipeg (Hybrid, 3x/week)On-call: May require to be part of on call rotation Monday to SundayOverview:Our insurance client is seeking a Senior Full Stack Developer to translate product and design requirements...

Java Developer Up to 100,000 Quant Capital is urgently looking for a Java Developer to join a pioneering tech start-up. Our client is an innovative company with a pioneering new concept for the financial markets with their big data technology platform. They have assembled a top team from across the financial markets and are looking to expand to meet high...

Vertex Solutions is seeking a Java Developer for an exciting Financial Services project in London. You will join a team building a brand new digital bank from scratch, contributing to core services and platform components.Experience with Java, Scala, or Kotlin, plus strong databases, distributed systems design, and a pragmatic engineering mindset are...

Avanti Recruitment is recruiting a Senior Java Full Stack Developer to join an established, international software company based in Central London. You will work across backend and frontend, using Java, Spring Boot and modern frontend frameworks to deliver scalable enterprise software.The role emphasizes hands-on coding, problem solving, and collaboration...

mthree is seeking an Expert Systems Developer to lead the architectural evolution and scaling of a high-throughput platform for a tier-one global financial institution. This role involves driving automation, influencing system design, and ensuring engineering excellence through rigorous standards and mentoring.Ideal candidates will have extensive experience...

NPAworldwide is seeking a hands-on Senior Software Engineer or Technical Lead to guide teams on a Central Government project. You’ll shape technical directions, design architectures and deliver full-stack solutions using Java, JavaScript, React and TypeScript in AWS, with CI pipelines via GitLab.You’ll drive quality and security, engage with clients, and...

Sanderson Recruitment is seeking a skilled software engineer for a major UK Defence and National Security programme based in London, Manchester, or Cheltenham. The role focuses on building and delivering solutions in a highly secure environment, with on-site collaboration at core locations.Ideal candidates have strong Python or Java skills, AWS proficiency,...

Client Server Limited in London is seeking a bright Java Developer for a Head of Software Architecture role focused on a financial Tech for Good product. You will drive backend systems, cloud integrations, and scalable event-driven architectures.You will own features from design through release, write production-grade code and automated tests, and...

A well-known trading firm in London seeks a Core Java Developer. Ideal for those passionate about engineering challenges and looking to make an impact on business functionality. Experience in Core Java and server-side multi-threaded Java is preferred. This full-time role allows for home work but requires presence in the city when needed. Join a tech-driven...

Avanti Recruitment is recruiting a Senior Java Full Stack Developer to join an established, international software company based in Central London. You will work across backend and frontend, using Java, Spring Boot and modern frontend frameworks to deliver scalable enterprise software. The role emphasizes hands-on coding, problem solving, and collaboration...

Citi London is hiring a Senior Java Engineer to help shape a high-performing team delivering next-level FX technology solutions. You will implement cross-border payments and custody systems using modern cloud-native tech and CI/CD.You will collaborate with sales, trading, quants and product teams to translate needs into data-driven solutions, design and test...

McGregor Boyall partners with a leading global investment bank to hire a hands-on low-latency engineer for its specialist electronic trading technology team in London. The role focuses on building Java and Rust event-sourcing frameworks that power ultra-fast algorithmic trading platforms at scale.You will contribute across the full stack, optimize JVM and...

IG Group's Prime division is seeking a Senior Java/FIX Engineer to design and modernise high‑performance trading APIs used by institutional clients. You’ll own services end to end, from architecture through production, focusing on resilience, latency and correctness in real‑time markets.You’ll work on REST, streaming and FIX APIs, modernising the FIX...

Placements24 in East London seeks a Senior Software Engineer to design, develop, and maintain robust backend services using Java and the Spring Boot framework. You will collaborate with cross-functional teams and mentor junior engineers to drive architectural decisions.The role focuses on scalable microservices, RESTful APIs, and relational databases within...