full stack javascript engineer jobs in London

Halian is seeking a Senior Full Stack Shopify Developer to join our fully remote team and deliver Shopify and Shopify Plus solutions for a portfolio of ambitious merchants. You will develop storefronts, apps, and integrations, implement Online Store 2.0 features, and build headless commerce with React, Next.js, Remix, or Hydrogen, while collaborating with...

Citigroup Inc. in London is seeking a hands-on SVP GenAI Full-Stack Engineer Lead to shape engineering culture and deliver AI-powered products. You will provide technical leadership, stay close to code, and collaborate with cross-functional teams to scale developer platforms and drive AI adoption.You will mentor engineers and set direction across frontend,...

Reccreate in London is seeking a top-tier engineer to join a visionary team at the forefront of AI-driven financial modelling. You will build a fast, intuitive UI, tackle complex rendering bugs, and optimise the AI agent’s data handling and context.You’ll own backend improvements, resolve API issues, and scale deployments for speed and reliability. As...

Arva AI is revolutionising financial crime intelligence with cutting-edge AI Agents. As a Senior Full-Stack Product Engineer, you will build and iterate on full-stack features of our AI-powered platform, including document fraud detection and web due diligence, and develop systems to automate testing and model improvements.You will work across front-end,...

Starling Bank is seeking a Full Stack Engineer (ML Ops) in London. Join a fast-moving fintech that values innovation, collaboration and ownership in a hybrid working setup.You will contribute across backend and frontend layers using Java, React and AWS, helping to build scalable services and data-driven features for a modern digital bank. Our team emphasizes...

C3 AI is seeking Forward Deployed Engineers to design, develop, and deploy AI-driven enterprise applications on the C3 AI Platform. You will work directly with customers to deliver production-grade software, demos, and proofs-of-technology, while mentoring teammates and contributing to code quality.An ideal candidate has a STEM background, 2+ years in...

Liberty Global Plc seeks a senior platform engineer to design, build and own platform capabilities across frontend, backend, APIs and cloud infrastructure. You will lead architecture reviews, drive scalable and secure designs, and deliver production-grade software from concept to deployment and support.You will evaluate complex technical challenges, guide...

Capgemini Invent in the UK is seeking a Java Full Stack Engineer to join our Digital Excellence team. You will work on cutting-edge digital transformation projects, building microservices with Java/Spring Boot and frontend apps with React in collaborative, agile squads.London, Glasgow or Manchester base with flexible, hybrid assignments. The role offers...

Monument in London seeks a capable Full Stack Engineer to own mobile and web platforms, building scalable, secure apps with a strong AI-first approach. You will work across front-end and back-end, partner with Product and Data teams, and contribute to a regulated financial services environment.You will design, implement and monitor solutions with modern...

Autonomai Recruitment's client, a well-established fintech, is expanding its London engineering team. You will own features across the full stack, from backend services to the UI, and work closely with product, design and the business.Join a small, senior group with end-to-end ownership; contribute to APIs, data services, and platform infrastructure as the...

A pioneering technology firm in London is seeking a Product Engineer to develop AI-native solutions. The ideal candidate will possess excellent software engineering skills and intuition for LLMs, with responsibilities including full-stack development and prototyping to enhance user experiences. Work includes collaboration with real users and shaping product...

A leading FinTech company is seeking a Full Stack Node.js/React Developer to shape the future of global payments. You will lead the frontend transformation, creating user-friendly interfaces and innovative financial applications. The ideal candidate has strong skills in Node.js and React, with a focus on security and user experience. This position allows for...

ARCA Consulting Ltd. is seeking a seasoned Full Stack .NET Developer to support a major digital programme. You will combine Microsoft backend development with React frontend work and hands-on Azure expertise to deliver scalable cloud solutions.Ideal candidates will have strong C#/.NET experience, Azure DevOps and CI/CD proficiency, and a solid grasp of...

Fitch Group in London seeks a Lead Software Engineer for AI-enabled full-stack applications. You will define strategy, guide architecture, and mentor engineers to deliver scalable platforms that empower analysts and stakeholders worldwide.Join a high-visibility team embracing responsible AI, modern engineering, and cloud-native practices. Hybrid work is...

Amatra Ltd in the United Kingdom is seeking a Product Engineer to design and build AI-powered features for the platform that elite sporting organisations rely on daily. You will work across the full stack—from data pipelines and LLM integrations to intuitive interfaces that present insights to users.You will ship features quickly, collaborate with founders...

Smart Communications is a leading customer engagement technology provider for regulated industries. We are seeking an experienced full stack developer to extend our long‑lived enterprise product, from the Java back end to the browser, with a focus on clean, well-tested code.You will join an Agile team, own features end-to-end, and contribute to automated...

Glot in London is seeking a versatile full‑stack engineer to help build our real-time translation platform. You‘ll work closely with the Head of Engineering or Head of AI, moving between AI, backend and frontend as the product demands.The role suits someone who ships side projects, loves hard problems, and prefers collaboration over ceremony. We offer a...

the company in London is seeking a senior full-stack engineer to help build the next stage of the product. You’ll work across our consumer app, backend, activity integrations and the infrastructure needed to scale.Stack: React Native / Expo / TypeScript | Node.js / Express | PostgreSQL | DigitalOcean. You’ll work closely with the founders in a tiny team...

A pioneering clean energy company in London is seeking a Software Engineer to enhance their website and develop internal tools. The ideal candidate has a Bachelor's degree in Computer Science and at least 2 years of experience in web development, along with proficiency in React and Django. This role includes automated testing and collaboration with...

Role: As a Full Stack Software Engineer, you'll enjoy delivering mission critical solutions to National Security customers. This isn't developing solutions that complete financial transactions faster, you'll develop cutting edge product that protects people, platforms, missions and information against constantly changing threats. You're a Full Stack Software...