full stack javascript engineer jobs in London

Ryan is seeking an early-career Full Stack AI Engineer to build AI-enabled full-stack software. You will join a cross-functional team, shaping problems into practical AI-driven solutions and delivering value through reliable code.Ideal candidates have strong software fundamentals, rapid learning, and the ability to explain design decisions. You will work in...

A leading HealthTech company in London seeks a Senior Full Stack Engineer to develop scalable, cloud-native products. The ideal candidate has over 5 years of experience with React, Typescript, Node.js, and AWS, working in data-sensitive environments. The role involves mentoring engineers and ensuring high engineering standards. Offers a salary up to £90k...

The Gym Group is seeking a Lead Full-Stack Developer to drive architecture and delivery across React/Next.js and .NET Core in a hybrid setup based in London. You will mentor engineers, shape technical direction, and collaborate with product, design, architecture, and partners to deliver high-quality digital experiences.You will design and govern AI-assisted...

Faculty AI is seeking a Full Stack Software Engineer to collaborate with cross-functional teams and build AI-powered systems for global clients. Take ownership of the full stack from frontend to backend, turning ML outputs into production-ready solutions that scale.You will lead cross-functional teams with data scientists and product managers, design robust...

Octopus Energy Group is seeking a Senior Fullstack Software Engineer (Python and React) to join our product and engineering team, building the systems that power our electric car leasing platform. Our tech stack includes Python with GraphQL, React with Next.js, PostgreSQL and NoSQL, deployed on AWS.You will work within a cross-functional team, build APIs,...

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...

Senior Full-Stack Software Engineer, (Forward Deployed), GPSLondon, UKScale’s rapidly growing Global Public Sector team is focused on using AI to address critical challenges facing the public sector around the world. Our core work consists of:Creating custom AI applications that will impact millions of citizensGenerating high-quality training data for...

Preply is hiring a Senior II Full Stack Engineer to drive backend systems in Python/Django and frontend in React/Typescript. You will lead complex initiatives, mentor engineers, and partner with product, data, and UX to deliver measurable impact at scale.This is a remote, internationally oriented role with opportunities across 175 countries. You’ll...

Location: UK or Netherlands Tech stack: Ruby, Angular, TypeScript, SASS, design system, Contentful, GitHub Actions Focus: hands‑on full stack product work, with room to grow into frontend About Tech at Bloom & Wild Group We're Europe's largest direct‑to‑consumer flower and gifting business (Bloom & Wild, bloomon and Bergamotte). Our Tech team builds...

Responsibilities Build and enhance complex GUI applications used in real-time environments Develop trading, operational and workflow management tools Design and build Python services, APIs and backend components Work on event-driven and distributed systems handling large volumes of data Create intuitive dashboards and visualisation tools for...

iProov provides science-based biometric solutions that enable the world’s most security-conscious organizations to streamline secure remote onboarding and authentication for digital and physical access. Our award-winning liveness technology and iSOC offer unmatched resilience against deepfakes and generative AI threats while ensuring effortless, scalable...

FullStack Developer 12 months London - remote £630 per day inside IR35 - Umbrella only Required skills Azure experience including Functions, App Services, Key Vault, Monitor, and general cloud?native design. C#, .NET 10, REST API development, and enterprise backend engineering. Frontend development with TypeScript, JavaScript or NHS Digital Design...

Summary Do you enjoy working on the sort of ground-breaking product that lifts the bar for an entire industry? Smart Communications has done it before, we're doing it again, and we're looking for an experienced full stack developer to help. About Smart Communications Smart Communications is a leading customer engagement technology provider for regulated...

A cutting-edge tech company in London is seeking a Fullstack Software Engineer to enhance their development tools. This role offers an attractive salary of £140k+, stock options, and exceptional benefits. The ideal candidate should have extensive experience in Python and frontend technologies like Vue or React. This opportunity allows you to work on...

Senior Full-Stack Engineer - AI Startup (Typescript, Node, React) London - 4 days per week in the office Permanent | £120,000 - £150,000 We're working with an exciting early-stage AI startup building an agentic platform for institutional finance. The company is a small, high-performing team of fewer than 10 people, moving quickly and building towards its...

Dare, based in London, is seeking a senior Full-Stack Engineer to join the Software Engineering team. You will own features end-to-end across UI, services, and data layers, building with React on the frontend and a modern backend stack.You’ll contribute to architecture, write robust code, and support real-time analytics for trading activities. You will...

Litta is hiring a Senior Full Stack Product Engineer to build and improve operational infrastructure for waste-collection scale. You will ship end-to-end features across frontend and backend, integrate external systems like Stripe/HubSpot, and leverage AI-assisted tooling to accelerate delivery while reducing manual work.The role requires ownership across...

JPMorganChase is seeking a Software Engineer III to join the Infrastructure Platforms, Data Center Services team. You will design and deliver full-stack solutions across frontend (React) and backend (Node.js/TypeScript, Python) services, ensuring secure, high-quality production code and scalable architectures.You will mentor junior engineers, participate in...

Harnham - Data & Analytics Recruitment in London seeks a Full Stack Product Engineer to join a newly created R&D function. You will work with AI, Data Science, Data Engineering and Product Engineering teams to take products from concept through production.Responsibilities include leading development from concept to deployment, translating business needs into...

Join a high-performing engineering team building the next generation of workflow automation platforms within a global investment banking environment. This team is focused on transforming complex, manual post-trade processes into intelligent, automated workflows. By combining modern software engineering, workflow orchestration and AI-powered document...