java programmer jobs in London

Are you a passionate Java Developer looking to work on large-scale application transformation projects? Join us and play a key role in modernizing critical applications that support one of the UK's most important public sector organizations.About the RoleAs a Java Developer, you will contribute to the refactoring and modernization of key applications for the...

Areti Group | B Corp™ is hiring a Full Stack Developer for a UK Government digital programme. 100% remote, BPSS clearance, and no travel required; join a fast‑moving team delivering public services.You’ll build citizen-facing services from front end to back end, using the GOV.UK Design System, with Java, Spring Boot, Node.js and modern cloud tooling...

Northrop Grumman UK is offering a 12-month Industrial Placement Software Engineer programme starting September 2027 in New Malden, London. You will gain practical software engineering experience by developing software for defence programmes and contributing from day one in a collaborative team.You will work with Java/C++ in modern environments, participate...

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...

Methods Business and Digital Technology LimitedMethods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we apply our skills in transformation, delivery, and collaboration from across the...

Virtu is a leading financial firm that leverages cutting edge technology to deliver liquidity to the global markets and innovative, transparent trading solutions to our clients. As a market maker, Virtu provides deep liquidity that helps to create more efficient markets around the world. Our market structure expertise, broad diversification, and execution...

About The RoleWe are looking for 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...

The payments service team are the heart of Tesco Technology, serving 28 million+ shoppers in the UK and abroad. We deliver HTTP services that reliably manage payments at global scale, 24 hours a day every day. We also provide capabilities that detect and prevent fraud and build upon innovative technologies to reduce loss. 100M+ transactions and billions of...

A trusted UK Central Government technology programme is looking for an experienced Senior Java Developer to join their team. This role involves designing and coding applications while working collaboratively with other developers and testers. Candidates should have strong Java expertise, solid experience with Web APIs, and be able to manage complex...

Mid-Level Software Engineer (Java / AWS)We’re supporting a large, well-established UK organisation on a key digital delivery programme and are looking for two mid-level Software Engineers to join an existing engineering team.This is a hands-on development role suited to engineers who enjoy writing clean, testable code, working collaboratively, and...

About Methods: Methods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we apply our skills in transformation, delivery, and collaboration from across the Methods Group, to create...

Calling all Full Stack Devs who speak fluent Node AND Java!Fancy building services that millions of people across the UK actually use, all from the comfort of your own home? No commute, no train delays, no awkward office small talk. Just you, your keyboard and some seriously meaningful code.We’re hiring a Full Stack Developer for a UK Government digital...

Job DescriptionSenior Java Architect | Banking, Payments & AI EngineeringLocation: London (Hybrid)Role Type: ContractRate: Up to £600 a day (Outside IR35)We're seeking an experienced Java Architect to play a key role in a major banking transformation programme, helping to deliver enterprise-scale banking and payments platforms with a focus on cross-border...

Senior Full Stack Engineer – Java/Kotlin&ReactWe 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 architecture with modern event-driven, cloud-native technology and delivering...

mthree is seeking a Java Software Engineer for a tier-one financial institution in London. You will lead architectural evolution, scale a high-throughput workflow engine, and embed intelligent decisioning into enterprise-scale processes.Expertise in Enterprise Java, distributed systems, and data management is essential, with exposure to AI/automation being a...

A leading technology firm in the United Kingdom is seeking a Senior Backend Developer to support a data platform programme for a global financial services organisation. The successful candidate will design and implement backend services, ensure high levels of automated testing, and integrate with various systems. Mandatory skills include strong experience...

Global Financial Services client is hiring for experienced Java or Python Engineers with strong Market Risk and FRTB IMA experience to join a high-profile regulatory technology programme. This will be a permanent role paying between £80K - £110K. Based in the City on a hybrid basis - 3 days per week in the office.Experience includes:Strong Java and/or...

Senior Java Software Engineer OpportunityA Senior Java Software Engineer opportunity in a growing team who are upgrading and modernising their tech stack. The business is well established across the UK and the team require experienced software engineers who can demonstrate strong Java and Spring backgrounds.The role offers a hybrid working structure (two...

Energy Jobline ZR in London (Hybrid) seeks a Senior Java Architect to lead the design and delivery of enterprise-grade banking and payments platforms. You will provide technical leadership to offshore teams and define microservices and event-driven architectures for cross-border solutions.The role requires strong Java/Spring Boot experience within...

Arrows is hiring experienced Java Engineers for a major technology programme with one of the UK's leading broadcast and media organisations. You’ll join a high-performing engineering team building and scaling event-driven, cloud-native services, working with modern technologies including Java, Kafka, Kubernetes and Docker.You’ll be hands-on across the...