senior java developerin jobs in London

Too Good To Go is building a brand-new London engineering hub. We are seeking foundational Senior Backend Software Engineers to join a newly formed team and help shape a global product. You will own complex backend challenges, collaborate with the Lead Engineer, and mentor mid-level engineers as the hub scales.You will work on a Spring Boot Java stack...

Rightmove in London is seeking a Senior Backend Engineer to design and deliver high‑quality, scalable backend services. You'll work with Java 17+ and Spring Boot to empower millions of users and thousands of agents on our platform.You'll collaborate across product, design, and engineering, mentor peers, and champion performance, testing, and robust design...

Harrington Starr is seeking a Senior Java Developer to contribute to a cloud-native post-trade platform. This engineering role involves designing and delivering scalable backend systems, working closely with Product and Client Services teams.The ideal candidate will have a strong Java background, experience with distributed systems, and knowledge of modern...

Fasanara Digital in London is seeking a skilled Java Software Engineer to join a small, high-performing team supporting our 24/7 trading activity. You will own the development of our multi-venue collateral management platform and related data pipelines.You will work primarily in Java and Kotlin on both new development and production systems, collaborating...

WE ARE: At Adaptive, we are a technology provider firm that partners with capital, commodity, and digital market participants to build custom front-office technology, messaging systems, and trading infrastructure. Our experienced teams design and deliver complex front-office technology solutions using our proven accelerators to create long-term competitive...

Free-Work is seeking a Senior Software Engineer to join a high-profile Life Sciences project. You will work on complex applications using Python and Java, with ML exposure, alongside an existing team in Central London and Oxford.Remote work is acceptable for the foreseeable future. Ideal candidates have 5–10 years of experience, may hold a PhD in Computer...

We are seeking a Senior Software Engineer to join the Risk Services team within Global Markets . This role focuses on designing and building scalable, distributed systems that support risk data processing, analytics and reporting workflows . The ideal candidate will have strong experience across Java and Python-based backend systems , with a solid...

Wise is hiring a Senior Software Engineer II for Cash Management to help shape the global payments network. You will design and build scalable microservices in Java/Spring Boot, ensure reliability, and collaborate across Product, Solutions Engineering and Business Development.You will model complex financial domains with Domain-Driven Design, work with Kafka...

IG Group's Prime API team is seeking a Senior Java/FIX Engineer to design and modernise trading APIs used by institutional clients. You will own services end-to-end, tackle latency challenges, and work on REST, streaming and FIX interfaces.The role sits in IG Prime, with cloud-native initiatives and live systems work. Strong Java, concurrency, and...

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...

IG Group is seeking a Senior Java/FIX Engineer for IG Prime to own the APIs connecting IG to institutional clients. You’ll work on real-time price distribution, order flows, and reference data, modernising the FIX estate and building cloud-native trading APIs.You’ll lead end-to-end service ownership, tackle latency and resilience, and collaborate with...

Keylane UK is seeking a Full Stack Developer to build SiteView with React front-end and Java/J2EE back-end, in a Docker/AWS environment.You will contribute across the development lifecycle, prototype features, write tests, and deploy, collaborating with a small team to deliver scalable SaaS for insurers. You will investigate issues, optimize performance, and...

Wise is a global technology company, building the best way to move and manage the world’s money.Min fees. Max ease. Full speed. Whether people and businesses are sending money to another country, spending abroad, or making and receiving international payments, Wise is on a mission to make their lives easier and save them money. As part of our team, you...

Oliver Bernard is seeking a Senior JVM Engineer to join its engineering team in Canary Wharf. This hands-on role focuses on solving complex technical problems, building scalable JVM-based systems, and upholding modern engineering practices in a strong engineering culture.You'll work primarily across the JVM ecosystem using Java, Scala and/or Kotlin, with...

Teksystems is seeking a Senior QA Automation Engineer to design and implement robust automation for REST APIs and React-based UI, using Java and Playwright in a financial markets context. You will build and maintain scalable frameworks, expand regression coverage, and integrate tests into modern CI/CD pipelines.Prior FX/trading exposure is advantageous, with...

Capitolis in London is seeking a Senior Software Engineer to design and build scalable, secure Java-based solutions and drive architectural decisions across the P.O products. You will work with product managers and R&D to implement roadmap features using Spring Boot, Docker, and cloud services.The ideal candidate has a strong computer science background, 8+...

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,...

Elsevier in London seeks a Senior Software Engineer-I to contribute to a team delivering high-quality software for author services, applying your technical expertise.You will collaborate with agile squads, implement software to meet business goals, fix complex issues, and help improve engineering practices. The role offers flexible working arrangements and...

CreateFuture in Edinburgh, Leeds, Manchester, London or remote locations seeks a Senior Software Engineer to build scalable Java, Node.js and AWS backends. You will shape architecture, mentor engineers, and drive AI/automation initiatives across client engagements. Strong design sense, collaboration and delivery focus are essential.You will design APIs,...

Nomura Holdings, Inc. in London seeks a Senior Java Developer for the Rates Intraday Risk Technology team. You will work with Flow Rates desks and quants to translate complex requirements into robust server-side solutions.The role involves contributing to the architecture refresh and building APIs that provide intraday risk and P&L data. Strong Java, Spring...