senior java full stack developer jobs in London

BNY is seeking a Senior Associate, Full-Stack Engineer in London. In this role, you will design and maintain backend services while collaborating on frontend development. Key responsibilities include delivering secure, scalable systems and contributing to performance enhancements.Required qualifications include proficiency in Java, knowledge of...

The Signal Group in Greater London is seeking a Senior Full Stack Engineer to join our expanding engineering team. The ideal candidate will have extensive experience in React, C#, and Azure, alongside a strong understanding of Agile methodologies. This hybrid work role offers the opportunity to work closely with data science and product teams to develop...

Lennox Soft in London (Shoreditch) seeks a Senior Full-Stack Cloud Engineer to architect and ship resilient cloud-native applications for European clients. You will leverage TypeScript, React, and Laravel/Node.js to build scalable web systems and orchestrate serverless and containerized workloads on AWS.You will ensure compliance with GDPR privacy standards...

Voop is building the world's first safe mobile platform. As a Fullstack Engineer, you’ll develop and scale our platform across web and mobile, collaborating with Nick Pasha-Gubbins (Co-Founder & CTO) and the engineering team on architecture and features for Voop for Care, Schools, and Parents.You will work with modern stack: Typescript, React, React...

Oho Group in London is seeking a skilled Full-Stack + Agentic AI Engineer to join a growing startup. You will own systems end-to-end, from backend services to frontend features, and directly influence real-world infrastructure.With 3+ years in full-stack and agentic AI, you will work with founders to ship production-grade software, contributing to...

Spotify is seeking a Senior Fullstack Engineer to join Groove, a platform that enables planning, collaboration, and execution across the company. You will build end-to-end features across frontend and backend, using React, TypeScript, Java, GraphQL, PostgreSQL, and Google Kubernetes Engine (GKE).You will work with product managers and designers to translate...

A leading AI technology company in London is seeking a Senior Full-Stack Software Engineer to develop innovative AI applications for the public sector. This role requires at least 5 years of engineering experience, specifically with React and cloud technologies. The position involves close collaboration with clients, ensuring high-quality application...

Vialto, based in Greater London, is seeking a Senior Full Stack Engineer to design and develop scalable products for global payroll and compensation solutions. This role involves hands-on engineering across Next.js, React, C#, and .NET, focusing on compliance in a multi-jurisdictional environment.The ideal candidate should have over 5 years of experience in...

ClearScore, the UK's leading credit score and report app, seeks a Senior Full Stack Data Scientist to own data science and ML across the Global Targeting initiative. You will collaborate with product and analytics teams to influence user experiences and business decisions, driving real-time insights and production-ready solutions.The role emphasises a strong...

Admanage, London-based, is hiring a Senior Full Stack Engineer to build an advertising management platform focused on Meta/Facebook ads and bulk campaign launches. You will work across Next.js, React, Node.js, Prisma, and REST APIs to ship full-stack features and scalable integrations.This hybrid, London-based role offers the chance to work with top...

Futureheads Recruitment Ltd is seeking a Staff Full Stack Data Analyst to join a mature Data & AI team. You will partner with senior commercial leaders to drive decision-making across customer acquisition, retention, growth, and customer success, while owning analytics initiatives.This 9-12 month contract offers remote or hybrid work from the UK and an...

Sphere is seeking a Senior Full Stack Engineer to own and build out new product lines (input tax, withholding tax, e-invoicing, tariffs) and critical platform components. You will contribute to scaling the AI-native compliance platform and drive ARR growth with end-to-end ownership.You will ship mission-critical features, manage a dedicated component, and...

Runna is hiring a talented, high‑quality full‑stack engineer in Greater London. You’ll architect, build and deliver features end‑to‑end across mobile apps and backend, collaborating with product, design and fellow engineers to ship reliable, intuitive solutions.You’ll own problems from design through release and support, evolve tooling and...

J.P. Morgan in London seeks a Full Stack Engineer to design, build, and support scalable web applications and integrations using Java, Python, and React.You will collaborate with product, marketing, and partners to translate requirements into technical solutions and contribute to AI initiatives for content generation and personalization. You will optimize...

As a Senior Full Stack Software Engineer at Cabiri, you will play a crucial role in designing, developing, and maintaining our software solutions. You will work collaboratively with cross‑functional teams, utilizing your expertise in both front‑end and back‑end technologies to create scalable and high-performance applications. The successful candidate...

A leading fintech startup in Greater London is seeking a talented developer to build real-time collaborative financial applications. You will design scalable APIs and integrate various financial data sources while ensuring data security and compliance. The ideal candidate will work with a modern tech stack including Elixir, Phoenix, and NextJS, thrive in a...

A leading recruitment agency is seeking a Senior Full Stack Engineer for a 12-month remote contract. The ideal candidate has at least 4 years of experience in Python and Flask, along with a strong grasp of SQL databases. Responsibilities include architecting backend services and building responsive front-end interfaces. This role involves mentoring junior...

Harnham is partnering with a high-growth international technology business to join the platform engineering team. You will own projects from design through to production, rebuild core services, and mentor colleagues while driving modernisation efforts across the platform.Based in London, you will design, build and maintain backend services, APIs and web...

Elsevier seeks a Senior Full-Stack Software Engineer to design, develop, and deploy cloud-based applications for research and publication workflows. You will collaborate with stakeholders to shape requirements and drive architecture for scalable, performant services.The role emphasizes mentoring, TDD, and modern tooling (Docker/Kubernetes/AWS). A strong...

Conveo.ai is building an AI research platform used by global brands. We seek a Senior Product Engineer who owns the full stack from interface to infrastructure, shaping product direction with technical impact.You’ll lead frontend architecture in React/TypeScript, design robust APIs, and ship complete features including AI-powered capabilities on AWS/GCP,...