senior software engineer- java jobs in London

A leading fintech company is seeking a passionate backend developer to drive innovation in their microservices architecture. With a strong focus on Java and Spring frameworks, you will work within a self-managed team in a hybrid or remote setting. The role emphasizes quality, collaboration, and career development. Candidates should have an extensive...

HKEX Group in London seeks a Senior Engineer to advance the LMEsmart platform. You will design high-throughput, low-latency inter-office integrations, automate test tooling, and drive real-time performance insights for governance and market oversight.You will work in a cloud-enabled environment, employing Java (JVM), distributed systems and container...

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...

A leading B2B SaaS technology company in London is seeking a Senior Java Engineer with expertise in Spring Boot and cloud-based systems. You'll design and scale products, mentor colleagues, and contribute to technical initiatives. The role offers a salary of up to £110,000 plus bonuses and excellent pension benefits. Join a collaborative environment where...

RE Partners in London seeks an experienced and opinionated Java Developer to join the high-performing engineering team, building low-latency, high-throughput payments systems.You will design scalable real-time services using Core Java, Spring Boot, and RESTful APIs, while mentoring engineers and shaping architecture.This hybrid UK role offers opportunities...

Luxoft in City of London is seeking a highly technical, hands-on Java developer to maintain and evolve backend and web applications within a trading platform. You will work with product owners and QA to deliver robust software across markets and time zones.Requirements include 8+ years of software engineering, strong Java 21, Spring Boot, REST APIs, React...

A leading software development company in London is seeking a Senior Java/Kotlin Engineer to join their high-impact product engineering team. In this hybrid role, you will design scalable backend services and influence technical direction. Ideal candidates will have extensive experience with Java/Kotlin, AWS, and distributed systems. You will benefit from a...

JPMorgan Chase & Co. in London seeks agile technologists to join the Global Liquidity Technology team and revolutionize how technology supports the Global Liquidity business, managing large asset flows and delivering high‑scale, low‑latency systems used by traders and portfolio managers.The role requires strong Java expertise (17+), TDD/BDD, and...

A leading payments consultancy in London is seeking a Principal Software Engineer to design scalable, high-availability systems. You will work with Java 17+, Spring WebFlux, and Kafka in a hybrid environment, contributing to real-time transaction solutions for major global banks. Ideal candidates have strong experience in reactive programming and an agile...

IG, a FTSE100 fintech, seeks a Senior Software Engineer to push AI across Lifecycle engineering with a primary focus on the Java backend. You will build tooling for AI-assisted coding, testing and deployments and integrate with Jira, Confluence, and the CI/CD pipeline.The role emphasizes test-driven development, ownership from design to production, and...

A leading technology firm is seeking a Senior Java Engineer in London to lead the development of core product features for a travel app. Candidates should have over 5 years of experience and strong programming and API design skills. The role requires a proactive approach to problem-solving and excellent communication to collaborate with various stakeholders....

Avanti Recruitment Limited is seeking a Senior Java Fullstack Engineer to join a renowned software company in Central London. The role is hybrid, with 2 days in the office weekly, and a salary up to £75,000 depending on experience.You will design, develop and enhance enterprise scale software, working across backend Java/Spring Boot and frontend...

Hunter Bond is seeking a Senior Java Developer for a hybrid Central London role with an initial 12-month contract. The position offers an outside IR35 setup and a day rate up to £700, starting in October.You will develop and enhance server-side Java applications supporting settlement and post-trade processes within a fast-paced financial markets...

J.P. Morgan is seeking a Senior Lead Software Engineer to join the Platform team in London. You will be a hands-on backend engineer focusing on a Spring Boot based framework and libraries that support Investments' product engineering teams.You will bring deep Java expertise, work with SDLC and Infrastructure teams, and drive standardisation and best...

A leading financial institution in London is seeking a Senior Java Developer for a 10-month onsite contract. The role involves designing, building, and maintaining Java-based backend systems, with a focus on cloud-native and microservices architectures. The ideal candidate has hands-on experience with Java, cloud technologies, and mentoring skills....

Oliver Bernard is seeking a Senior Java Developer to join a high-performing engineering team delivering a major financial services project in London.This is a hands-on role focused on clean, maintainable code, automated testing and continuous delivery in an Agile environment. You’ll work alongside experienced engineers, architects and product specialists...

Wise Platform is seeking an API Experience Engineer to join the API Experience Team in a hybrid London-based role. You will design, build, and lead scalable public APIs with Java, Spring Boot, Kafka, and PostgreSQL, shaping developer experience for global partners.The role emphasizes API standards (REST, OpenAPI/Swagger, OAuth2), mentorship, cross-functional...

Grid Dynamics is seeking an experienced Java/Kotlin Engineer to join the core engineering team delivering a major, multi-year strategic risk system replatforming programme. You will work at the heart of the programme, building key components within a highly scalable, risk-tolerant architecture designed to handle very large volumes of data in a demanding...

We’re looking for a Senior Software Engineer to join our Payments engineering team and help design, build and evolve the software behind our e-billing and payments platforms. This is a hands-on full-stack engineering role for someone who enjoys solving complex technical problems, writing high-quality software and having a real voice in how solutions are...

Job ID: Posted: Location: London, England, United Kingdom Category: Technology Company: Citi About the Team The Enterprise AI Products team is a small, high-impact global team within the Citi COO/CTO organisation, dedicated to building innovative AI solutions for the wider bank.We are at the forefront of Generative AI, delivering capabilities that...