Software Senior Engineer United Kingdom Jobs

Join Caribou as a Senior Software Engineer in London. Own our full-stack monorepo, using React/TypeScript and Golang to build our tax platform. We seek 5+ years of full-stack experience with cloud services and a drive for architectural excellence. Enjoy competitive salary, EMI options, health ins...

Join Scale's Global Public Sector team in London as a Senior Full-Stack Engineer. Build impactful AI applications using React, TypeScript, Python, and cloud platforms. Partner directly with clients to deploy and architect scalable, production-grade solutions.

Join a leading hedge fund in London as a Senior C# Engineer. You will design and enhance high-performance, low-latency Order Management Systems (OMS) in a hands-on role. Collaborate directly with traders and quants to deliver bespoke, mission-critical trading solutions. This role requires deep C#...

Join a remote-first, global team as a Senior Java Software Engineer. You'll build and maintain the core backend platform, focusing on stability and reliability for complex systems. This role requires strong Java fundamentals and a proactive mindset. Enjoy high autonomy in a low-ego, quality-drive...

Shape the future of streaming as a Senior Android Engineer in Manchester. Develop the Roku mobile app using Kotlin and Compose to control millions of devices. Leverage modern tech and AI tools to build high-performance, intuitive experiences. Enjoy comprehensive benefits and work with IoT protoco...

Join Roku in Cambridge as a Senior Android Engineer. Shape the future of streaming by building intuitive, high-performance mobile apps to control Roku devices. We seek an expert in Kotlin/Compose, Play Store deployment, and AI tools, with IoT experience a plus. Enjoy comprehensive benefits and wo...

Join a leading crypto company in London as a Senior Backend Engineer. Design and scale high-performance, event-driven systems for real-time blockchain transactions. Leverage your expertise in distributed systems and Python/C++/Java, with a move to Rust. Build impactful infrastructure in a fast-pa...

Join our London team as a Senior Software Engineer. Design and scale a high-performance, event-driven backend platform using modern technologies. Leverage your expertise in distributed systems and Python/C++/Java, with an opportunity to transition to Rust. Enjoy a strong engineering culture, lead...

Join a leading bank's multi-year tech transformation as a Senior Java Engineer in London. Design robust microservices and APIs for critical banking platforms using Java, SQL, and Agile practices. This permanent role offers a competitive salary, long-term growth, and real impact in a regulated env...

Join a growing SaaS company in Wigan as a Senior Software Engineer. You'll own full-stack development using C#, .NET, and Azure, modernizing microservices with modern architectures. Enjoy hybrid working, private healthcare, and share options in this key role.

Join a leading global financial services firm as a Senior Java Engineer in London. You will develop and enhance a critical, high-impact enterprise platform using modern Java. This hands-on role involves driving technical strategy, ensuring engineering excellence, and collaborating with senior sta...

Join Roku's DMTE team in Cambridge as a Senior Software Engineer, Embedded UI. You will architect and optimize C++ and BrightScript systems for graphics rendering on a global scale. Tackle performance-critical challenges, integrate AI/ML capabilities, and impact millions of users. We offer compre...

Join Barclays in Glasgow as a Senior Software Engineer. You will design and develop high-quality, scalable software using modern frameworks like React/Angular and Java/Spring. Collaborate cross-functionally to drive innovation and deliver secure, reliable digital services. Enjoy benefits includin...

Join TxODDS in London as a Senior Software Engineer. Design scalable, high-performance solutions using Scala and Kafka, while championing simplicity and industry best practices. This hands-on role involves mentoring, architectural decisions, and shaping the future with AI-assisted development. En...

Join TxODDS in London as a Senior Software Engineer for Data Acquisition. Build and maintain high-performance, real-time data pipelines using Python/Java, Kafka, and Kubernetes. You'll ensure data accuracy and reliability for global sports betting technology, working in a collaborative, distribut...

Join our Core team as a Senior Java Software Development Engineer. You will build the distributed, low-latency engine at the heart of the Hazelcast Platform. We require strong Java proficiency, experience with complex backend systems, and deep concurrency knowledge. This UK-based role offers exce...

Join a leading hedge fund in London as a Senior C# .NET Engineer. You will design and enhance high-performance, low-latency Order Management Systems (OMS) in a mission-critical trading environment. This hands-on role requires deep C# expertise and collaboration with traders and quants. Enjoy a hi...

Join our London team as a Senior Software Engineer. You will lead development on our PHP/Laravel, MySQL, and AWS platform, building scalable RESTful APIs and web apps. We value expertise in modern software engineering, CI/CD, and full-stack performance tuning. Enjoy a collaborative, supportive en...

Join Twilio's SDK Engineering team in the UK as a Senior Software Engineer. Design and build scalable backend systems and GraphQL layers for Contact Center products using Java/Scala. Champion reliability, mentor peers, and enjoy competitive pay, generous leave, and comprehensive benefits.

Join our London team as a Senior Software Engineer II in Forensic Intelligence. Design and scale global systems for video evidence analysis, working on media pipelines and forensic tools. Leverage 8+ years of experience to mentor engineers and shape technical architecture. Enjoy competitive salar...