senior java backend developer jobs in London

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...

Company description Publicis Media harnesses the power of modern media through leading agency brands Dysrupt, Infinite Roar, Publicis Collective, Publicis Health Media, Spark Foundry, Starcom and Zenith, as well as global accelerator PMX; immersive experience group PMCI and access to integrated platform-based technologies and offerings from CJ, Epsilon and...

Senior Low Latency EngineerBuild the Technology Behind Modern Financial MarketsJoin a global financial markets technology organisation where engineering plays a central role in powering electronic trading, market connectivity and real-time decision making.This is an opportunity to work on mission-critical systems that support high-performance trading...

Job DescriptionAre you an experienced Senior Software Engineer or Technical Lead who enjoys remaining hands-on while guiding teams and shaping technical solutions?A leading specialist technical consultancy is looking for a Software Technical Lead to join a live Central Government project. You will work within a collaborative Agile team, building bespoke...

FRESH has partnered with a fast-growing, SaaS company who are looking for a Senior PHP Engineer to join its engineering team at an exciting stage of growth. The business builds modern, cloud-based software used by enterprise clients across the global hospitality, spa, and wellness industry.If you are considering sending an application, make sure to hit the...

OverviewWe are seeking a highly skilled and experienced individual to join our dynamic team at Demo Co. In this position, you will play a critical role in designing, developing, and maintaining innovative software solutions that meet the needs of our clients.Key ResponsibilitiesCollaborate with cross-functional teams to define, design, and ship new...

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...

The Data Center Builder Tools team is looking for a seasoned, self-directed Senior Software Development Engineer to lead the design and evolution of the real-time middleware and controls platform that powers industrial control systems across AWS Data Centers worldwide. Contribute to Amazon's vision of developing the safest, most secure, reliable, and...

Navan (Nasdaq: NAVN) is the AI-powered business travel, payments, and expense platform that makes it easy to book, pay, and close the books. Travelers get a product they actually want to use. Finance teams get real-time control, policy, and reconciliation. Expense is a core part of that story: from the moment a receipt is captured to the moment it lands in...

About The Company Emma is the app to manage all things money. Our mission is to empower millions of people to live a better and more fulfilling financial life. Emma was founded by engineers, who are extremely focused on coding, product and data. These are the three pillars on which we want to build a strong tech culture and fix personal finance once for...

Backend Development: Set up and maintain the backend server using Flask to support the application, ensuring scalability, security, and efficiencySeniority levelEntry levelEmployment typeFull-timeJob functionEngineering and Information TechnologyIndustriesTechnology, Information and InternetLocation: London, England, United KingdomWe’re unlocking community...

The Experience team designs Spotify’s consumer experience—end to end, moment to moment, across every screen, platform, and partner integration. Our mission is to make listening feel effortless, personal, and joyful for billions of users around the world. That means turning complexity into clarity across hundreds of touchpoints—from our mobile and...

Starling Bank is seeking a Senior Java Developer to optimize real-time banking ledger processing microservices. The role is fully remote within the UK, offering milestone-based compensation and GDPR-compliant operations.The candidate will work primarily with Java, Spring Boot, PostgreSQL, and Docker in a backend-focused environment, contributing to...

Description This role will be mainly remote but require flexibility to travel to client sites, and our offices based in London, Sheffield, and Bristol. About the roleAs a Senior Microsoft Power Platform and AI Developer, you will work with users, product teams, engineers, architects, security and operational colleagues to turn complex needs into reliable...

The Opportunity JUXT is partnering with a Tier 1 investment bank on a strategic initiative to build its next-generation FX Risk Platform. The programme is consolidating risk management capabilities into a modern, scalable architecture while decommissioning multiple legacy risk applications. We are looking for a Senior Kotlin / Java Engineer to join the team...

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...

A global technology company is looking for a dedicated backend engineer to join their team in London. You will drive the technical vision for the backend solution powering the recipient management product, collaborating with an agile team focused on delivering top-notch customer experiences. The ideal candidate has experience in Java 8+, distributed systems,...

About 9fin9fin is the AI platform powering global debt markets — the world’s largest asset class at over $145 trillion.Debt markets are vast, global, and mission-critical, yet still run on fragmented data, PDFs, and manual workflows. 9fin replaces this broken infrastructure with a single platform that centralises proprietary credit data, deep analysis,...

A London-based trading company is looking for an experienced Java Engineer to join their technology team on an initial 6-month contract.This role is well suited to a backend-focused engineer who enjoys building robust, scalable Java services using modern frameworks, working closely with product, trading, and engineering teams.The RoleDesigning and developing...

Senior Product EngineerLocation: Nine Elms, London. Full time- hybrid with at least 3 days a week on site.You'll need the right to work in the UK and be based in London. We are not able to offer visa sponsorship for this role.About ZappZapp is building the future of convenience with a full stack approach to on-demand essential items, 24/7, delivered in...