staff java backend developer jobs in London

Senior Frontend Developer Up to £80,000 Central London - Flexible Hybrid Options Health-Tech A start-up within the health space are seeking a Senior Frontend Developer to join a high performing squad of engineers building a unique SAAS platform which is radically streamlining an existing complex process. You'd join as a Senior Frontend Developer and...

A global financial services organisation is seeking a Senior Java Engineer to contribute to a vital enterprise platform. This hands-on role involves not only development but also shaping technical standards and collaborating with senior engineers to enhance platform quality. Ideal candidates should have strong experience in Java backend development and the...

Wise London is seeking a passionate Backend Software Engineer to join the Pricing Core team. You will design, develop, test, and maintain backend services in Java using the Spring Boot framework, deployed on cloud infrastructure (AWS).The role focuses on building event-driven architectures with Apache Kafka for asynchronous processing of financial events...

Senior Frontend Developer Up to £80,000 Central London - Flexible Hybrid Options Health-Tech A start-up within the health space are seeking a Senior Frontend Developer to join a high performing squad of engineers building a unique SAAS platform which is radically streamlining an existing complex process. You'd join as a Senior Frontend Developer and...

ARQ in London seeks a Backend Engineer to design, develop, and maintain scalable, secure backend systems powering fintech products. You will build REST APIs, craft microservices, and work on systems used for payments, treasury, and transactions booking, with a Java/PostgreSQL stack and Spring Boot.Join a fast-growing team embracing clean code, TDD and CI/CD,...

Anyone AI is recruiting skilled Full-Stack Developers (Python, Javascript/TypeScript) to work on a project with a leading AI Lab. Qualifications:Advanced professional written proficiency in English3–7 years of professional software engineering experienceStrong proficiency in Python and JavaScript/TypeScript; working knowledge of Java, C#, or GoBackend or...

KX Systems, Inc. is seeking a Senior/Intermediate Java Engineer to join its R&D team in a hybrid London/Newry/Belfast role. Focus on backend and middleware development with Java 17 and Spring, integrating with kdb+ in a distributed, high-availability system.The incumbent will implement authentication/authorisation, security best practices, and contribute to...

Staff Software Engineer London, UK About the role Applied Intelligence Systems (AIS) is part of the Scale Generative AI Platform (SGP), focused on pushing the frontier of what agentic applications can do across diverse enterprise and government use cases. We build the infrastructure and tooling that power agentic AI in production, paired with applied ML...

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...

SENIOR BACKEND SOFTWARE ENGINEER | UK REMOTE | £100,000 - £120,000About the OpportunityMy client, an exceptional aerospace tech firm building next-gen communication intelligent networking company are looking for a Senior Backend Engineer to work on their highly technical core systems.The RoleJoin their core engineering team to design, build and refine...

Job Title: Lead Java Developer Location: London About the Job you are considering: Join Capgemini’s Cloud & Custom Applications (C&CA) practice within the Financial Services business, where we help clients solve complex challenges through innovative, scalable, and business-critical technology solutions. Guided by our vision to Consult with Purpose....

Company DescriptionVersion 1 has celebrated 30 years in business and continues to be trusted by global brands to deliver technology and transformation solutions that drive customer success. Our deep expertise enables our customers to navigate the rapidly evolving technology landscape. We foster strong partnerships with global technology...

About Us:Solirius Reply, part of the Reply Group, is a technology consultancy and digital transformation partner that helps organisations solve complex challenges through strategy, design, engineering, and delivery.We work closely with our clients to deliver secure, accessible, user-focused services that evolve with their needs. By combining deep technical...

Fullstack Developers at HRT work either on our platform team (i.e. you work on infrastructure & tooling that supports all of our research & trading capabilities) or our acceleration team (i.e. you are aligned with a specific algo research & trading team). All of our Fullstack Developers have internal customers and deeply understand end-user needs. They build...

A technology consulting company is seeking a Backend Java Developer to build core backend services in a hybrid role based in Birmingham. You will implement policy engines for data governance and work with distributed data platforms. The ideal candidate has strong Java and Spring experience, expertise in SQL parsing, and familiarity with CI/CD processes. This...

Remote · Full Time · Individual Contributor · +8 Years of Experience Staff Engineer, Money, Risk & Payment Ancillaries Who We Are Yuno is the AI-native operating system of global commerce, powering the financial infrastructure of enterprise merchants, banks, and wallets. Through a single API, Yuno connects them to pay-ins, payouts, fraud prevention,...

CoreWeave is The Essential Cloud for AI™. Built for pioneers by pioneers, CoreWeave delivers a platform of technology, tools, and teams that enables innovators to build and scale AI with confidence. Trusted by leading AI labs, startups, and global enterprises, CoreWeave combines superior infrastructure performance with deep technical expertise to...

Our Global Structurethe company is now part of DoorDash, bringing together teams with even greater reach, scale, and ambition. Depending on your role, you may collaborate with teammates, systems, and leaders across DoorDash and Wolt. Together, we're unlocking new possibilities as one global team.Your job is to make sure every payout and transaction lands...

About the companyOur client is a YC-backed, Series A AI company building autonomous voice agents for trades and field-services businesses. Its product integrates with industry CRMs to automate customer calls, booking, scheduling, invoicing, and urgent service workflows. The company recently raised a $13M Series A led by a leading venture firm and is growing...

Staff Engineer / Developer (C# .Net AWS Python) London / WFH to £120kWould you like to join a growing and profitable scale-up recognised as a leading FinTech disruptor, where you'll have significant influence, visibility and genuine opportunities for progression?As a Staff Engineer, you'll play a key role in shaping the technology strategy, architecting and...