senior java backend developer jobs in London

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...

We are currently seeking a Full Stack Engineer to join our dynamic team. Neoflow prides itself on its commitment to innovation, and as our Full Stack Engineer, you will play a pivotal role in developing and implementing cutting-edge solutions. This role is not just a job—it's a career packed with opportunities to grow and make a significant impact in a...

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,...

Project descriptionJoin the Equity Accelerator programme, a strategic multi-year transformation initiative focused on modernizing Prime Finance Equities platforms. The role involves developing and enhancing institutional-grade trading and post-trade systems using cloud-native, event-driven architectures while delivering advanced client-facing features....

At The Multiplayer Group (MPG), we create world-class multiplayer experiences through Co-Dev and Full-Dev partnerships. Our people-first culture supports a diverse, global team in a welcoming and flexible work environment. With teams spread worldwide, we prioritise connection—both online and in person. Giving back is central to who we are, with a focus on...

Full Stack Developer -Gaming & Immersive Entertainment TechnologyLocation:Hybrid / Flexible Working Salary:Competitive + Benefits Our client is a leading innovator within the gaming and immersive entertainment sector, creating technology-driven experiences that bring together digital gameplay, interactive environments, and cutting-edge hardware. With...

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...

OverviewSenior Java Development Manager Banking — TieTalent. This is a new and exclusive opportunity for a strong Java software development leader to join a front office software development team focused on Sales and Trading Derivatives platforms. This is a permanent, hybrid role in London with a base salary plus bonus and pension.ResponsibilitiesLead the...

A dynamic technology consulting firm based in the UK is on the lookout for an experienced Java Developer. The role requires expertise in Core Java and SpringBoot, focusing on developing high-throughput systems in the payments processing domain. Responsibilities include designing and optimizing backend systems, building RESTful APIs, and collaborating with...

Lead Java Developer  Business Unit: FTSE Russell – Index Platform Company: London Stock Exchange Group (LSEG)  About the Role We are seeking a highly skilled and hands-on Lead Java Engineer with AI proficiency to help build the next generation FTSE Russell Index Platform. This platform underpins the calculation and distribution of FTSE...

Principal Full Stack DeveloperA unique opportunity for a Principal Full Stack Developer to join a very well-funded early-stage technology company. Initially working remotely, with plans for a hybrid London office, you will play a pivotal role in transforming an innovative prototype into a production-ready platform while helping shape the long-term technical...

TL;DR: We're looking for exceptional ABAP engineers eager to build the AI layer for operating the world’s most complex IT setups. This role moves beyond just ABAP: you’ll develop software across the stack, design AI harnesses and agents, influence product direction, and work with customers.Why ConductToday, no single person fully understands their ERP...

**About the company:** Apexon is a digital-first technology services firm specializing in accelerating business transformation and delivering human-centric digital experiences. We have been meeting customers wherever they are in the digital lifecycle and helping them outperform their competition through speed and innovation Apexon brings together distinct...

TL;DR: We're looking for exceptional builders who help us design and ship the foundational infrastructure that lets Conduct scale to the world's largest enterprises, while accelerating the product teams building on top of it.Why ConductThe world's largest companies are slowed down by the software they run on. We’re building the AI operating system that...

Paid Parental LeaveThis position is responsible for designing, developing, and optimizing our mission-critical, high-throughput FX real-time risk system. As a Senior Software Engineer, you will leverage your deep technical expertise to drive the architectural evolution of low-latency processing systems, solve complex engineering challenges, and provide...

Adecco in Wembley, London, is seeking a Lead Modernization Engineer (Java/Node.js) to join on-site, five days a week. You will drive modernization initiatives, own core backend services, and collaborate with a Principal Architect on cloud-native projects.Role focuses on Java, Spring Boot, microservices, Azure services, and robust CI/CD with containerization....

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,...

Game Logic Server DeveloperWe are looking to hire a Game Logic Server Developer to join our talented team. You will be a key player in bringing our industry-leading online slot games to life - taking a game concept and building it into a fully working game on our Java code base, and owning that product all the way through to release.Working closely with...

**What’s Yonder?** *“It's as if Time Out, Amex and Monzo had a baby”* - Will T, Yonder Member Yonder combines credit and debit in one membership that’s fair, flexible and actually enjoyable. No jargon. No dusty points system. Just rewards that actually feel rewarding, from bao to beer to a boarding pass. The engineering team sits at the heart of...

Title: Node.js Backend Developer Salary: up to £80,000 + share options Location: Fully remote (UK) Sector: Cybersecurity SaaS We’re supporting a high-growth cyber SaaS scale-up on the hire of a Node.js Backend Developer to own production APIs and serverless microservices. You’ll work with senior engineers to design, build and operate secure,...