staff java backend developer jobs in London

UFORCE, a defence-tech company headquartered in London, seeks a Senior/Staff Software Engineer (Nova Core) to design, build, and operate backend services powering Nova Cloud deployments and inter-team integrations.You’ll own API contracts, data models, observability, and secure-by-default patterns, collaborating with product and engineering teams to...

The RoleWe are looking for a Senior Engineer to join our growing engineering team to define, build and iterate on features for our consumer-facing product. You will work closely with Product, Operations, Customer Support, Growth and other functions to design and build a reliable, intuitive, and simple experience for our users. As an early member of the team,...

**About Anthropic** Anthropic’s mission is to create reliable, interpretable, and steerable AI systems. We want AI to be safe and beneficial for our users and for society as a whole. Our team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working together to build beneficial AI systems. **About...

Fanatics is searching for a Senior Software Engineer (Backend) in the United Kingdom. In this role, you will lead the design and implementation of backend services for our FMX trading platform, utilizing your expertise in Java and Go.Your responsibilities will include ensuring high-performance and fault-tolerant services, collaborating with teams, and...

At Ledgy, we’re on a mission to make Europe a powerhouse of entrepreneurship by building a modern, tech-driven equity management and financial reporting platform for private and public companies. In 2026, we aim to be the leading provider for European IPOs and reporting for share-based payments. We are a value-based company with a core focus on being...

Senior C# Engineer .Net, Typescript, Lambda, API Gateway, SQS, SNS, CognitoConsidering applying for this job Do not delay, scroll down and make your application as soon as possible to avoid missing out.? £700 £800 per day Outside IR35100% Remote8-month rolling contractPlay a pivotal role in architecting and delivering a major greenfield B2B SaaS platform...

Wise is recruiting for an API Experience Engineer to design and scale backend services using Java, Spring Boot, and Kafka. You will own API standards, contribute SDKs and reference implementations, and mentor engineers across Wise.You will collaborate with product and implementation teams to shape features, drive a developer-first approach, and ensure...

LMAX is renowned for its high-performance, ultra-low latency (we measure in microseconds) exchange written in core Java. We constantly push technology further than most, especially in our greenfield projects, driving the financial industry in new directions.Developers are encouraged to constantly develop and learn new skills. Pair programming supports...

We are looking for a talented and experienced full stack developer with experience in Finance process within Investment banking for one of our global investment banking clients Primary task would be to Design and develop responsive, high-performance front-end applications using React 18 and TypeScript for trading desks and risk reporting teams. Build and...

About the job Mobile Application Developer - London Note: This position does not offer any Visa sponsorship. We are only looking for applicants who are either local to London, UK,or ready to relocate to the employer's location. Note: Please share your resume in English only. Job Summary:Our Client is looking for a creative and skilled Mobile Application...

Staff Software Engineer – Back EndCapital One – White Collar Factory (95009), United Kingdom – London office.OverviewDo you love shaping the technical landscape and driving innovation across the organisation? Are you passionate about solving complex business problems and supporting multiple teams toward a shared technical vision?At Capital One, you'll...

Mobile Service Layer Engineer 24 month contract Inside IR35 – Paying up to £50 per hour via umbrella. Location: Hybrid – working in London and Burgess Hill. We are currently looking for a Mobile Service Layer Engineer who has a proven track recording working with Java 17, Swift and Kotlin. You will be building the mobile application service layer...

Institutional Fabric for the Digital Asset MarketFounded in 2018, Talos provides institutional-grade trading technology for the global digital asset market, powering many of the major players in the crypto ecosystem. Our mission is clear: to advance the mass adoption of digital assets by seamlessly connecting institutions to the digital asset ecosystem. We...

Java Engineer - Equity VolatilityThe successful candidate will join a global team that designs and develops Equities Volatility Risk and PnL and Market data systems. The candidate will work hands-on with other developers, QA and production support teams. The team interacts with key stakeholders such as Portfolio Managers, Middle Office and Risk Managers....

Airswift in London seeks a Senior or Lead Full Stack Engineer to deliver an AI-assisted enterprise asset management platform, covering frontend, backend, workflow and cloud delivery.You will build UI with React/TypeScript, develop Java backends, APIs, Postgres, and CI/CD pipelines, leveraging AI tools like GitHub Copilot to boost productivity. Hybrid work...

We are looking for a Tech Lead to guide and scale our Product Infrastructure teamIn this role, you will lead a team of 3–5 engineers while remaining closely involved in technical architecture and executionOur team sits at the critical intersection of raw data collection and product utilityWe focus heavily on infrastructure support, scalability, and service...

Staff Frontend Software Engineer London or Edinburgh based, hybrid working We are looking for a brilliant, creative, curious, and technically ambitious Staff Frontend Software Engineer to join our team. This team delivers internal and customer-facing web applications to manage complex ad campaigns and provide deep reporting, analytics, and data visualisation...

Principal Software Engineer Salary to £80k, poss higher for their ‘Unicorn' candidate Role can be based remotely, as long as you can occasionally travel to London for client work (travel expenses paid)- approx. once a month. NB: Please only apply if you are a UK National & UK passport holder, have resided in the UK for the past 5 years and are prepared to...

Infosys Limited is seeking a highly skilled Scala Developer to join our Technology team in City of London. You will design, develop, and maintain API-driven backend components and integrations powering our application platform, with a focus on scalability and reliability.You should bring 6+ years of IT experience, strong Scala and Java skills, and solid...

Ripple is seeking a Staff Software Developer to lead the modernization of our liquidity platform. You will architect, implement and scale core components, balancing speed and reliability while guiding a world-class engineering team.You will mentor engineers, shape coding standards, and drive strong practices in observability, CI/CD, and production readiness...