full stack javascript engineer jobs in London

Are you passionate about building secure, scalable software and cloud infrastructure that supports critical services in production? Do you enjoy collaborating across teams, improving engineering practices, and helping others grow while delivering high-quality solutions? About Our Team Working within Information Security & Data Protection division, the...

Ebury is building an AI-powered financial crime investigation platform. We seek a Senior Full-Stack Engineer to scale the system from React frontend to Python FastAPI backend and integrate LangGraph-based AI workflows.You will mentor teammates, shape architectural direction, and work across Product, Design and Compliance to deliver impactful features. Join a...

Mat Vin in London is seeking a highly capable Full-Stack Engineer to help build an AI-powered platform for industrial inspections. You will own both product and technology decisions, moving fast with autonomy while delivering enterprise-grade features.You’ll be working from our sunny Farringdon office, collaborating with enterprise clients, and shaping the...

Minerva Defence is seeking a full stack software engineer to take feature requests from frontline users and design, implement, test and ship them. You will own the work across the stack—from backend to frontend, and into networking or ML as needed.You will work on products used by operators daily, delivering reliable updates and field testing. The role...

RedRock Consulting Ltd seeks an experienced senior full-stack contractor to own end‑to‑end features across the stack. You will craft React/TypeScript front ends, design Python/FastAPI or Node.js back ends, and shape data with SQL/NoSQL stores while ensuring secure, well-tested code.You’ll ship via GitHub Actions CI/CD, run in containerised...

EngineersOfAI is seeking a Senior Engineer who will work on developing solutions for our banking platform, collaborating with diverse teams. The role offers flexible working, primarily based in London but open to candidates across the UK.As a full-stack engineer, you will contribute to various initiatives, with no formal qualifications required, just a...

True Talent Solutions Partners is seeking an experienced software/product engineer to join an early-stage team in London. You will embed with customer operations, translating real-world needs into AI-enabled software across the stack, from frontend to data models and deployment.You will own product areas from discovery to launch, engaging with leadership and...

A leading digital-assets trading firm is seeking an experienced Full Stack Engineer to build high-performance trading products, client portals and internal applications.The roleYou will own features across the full stack, from backend services and real-time APIs to modern interfaces used by traders and clients. You'll work closely with engineering, product...

Wintermute is seeking a Full Stack Engineer to build and improve trading applications for internal and external users. You will work across the stack, from backend services to client-facing portals, with guidance from experienced developers and traders.The role offers ownership and rapid learning in a dynamic, crypto-native environment. You will collaborate...

Wexler, based in London, is seeking an entrepreneurial full-stack engineer to architect, build and scale agentic systems for document analysis powered by an advanced fact extraction engine.As a Software Engineer, you will shape the technical architecture, work with the founders, and rapidly assume leadership responsibilities in a fast-growing startup with...

Cato Networks is seeking a Senior Software Engineer to join the secured access engineering team. You will design and build user-facing, product-grade web security solutions that protect customers' online presence, alongside internal infrastructure platforms used across the company.You will take a leading role in designing complex architectures and delivering...

Capgemini is hiring a highly capable Full-Stack JavaScript/TypeScript engineer in London hybrid roles. You will work with innovation consultants, UX/UI designers and engineers to shape opportunities using emerging tech, leading projects from discovery to pilot, and delivering scalable solutions that balance speed and quality for real business value.You will...

Runna is hiring for a talented engineer to join the Train Team in London. You’ll work across frontend and backend, collaborating with modelling/AI teams to integrate features into Runna’s training platform for runners.The role focuses on building scalable, end-to-end experiences in a fast-paced environment. You’ll partner with founders and leadership,...

Discover your future at Citi Working at Citi is far more than just a job. A career with us means joining a team of approximately 219,000 dedicated people from around the globe. At Citi, you'll have the opportunity to grow your career, give back to your community and make a real impact. Job Overview We're looking for a hands-on engineering lead with a...

Harnham is seeking a capable Full Stack AI Engineer to design and build production-ready AI applications using Python and TypeScript. The role spans frontend interfaces, backend services, APIs, and scalable architectures, with a focus on deploying LLM-powered solutions in secure environments.You will work with Docker and cloud platforms like Azure or GCP,...

IFS is seeking a Senior Full Stack Engineer to shape and deliver scalable, cloud-based IndustrialAI solutions. You will provide technical leadership across front-end and back-end, influence architecture, and evolve the platform into a secure, observable product portfolio.You will work across GoLang and React, mentor engineers, and champion DevOps, testing,...

the company is seeking a Full Stack Software Engineer to build custom web and backend solutions for enterprise clients in London. You will work with React, TypeScript, Node.js, Python, Go and/or Java in a Scrum environment with one-week sprints and peer reviews.The role emphasizes collaboration with Designers and Project Management, delivering end-to-end...

Wayve in London is seeking a hands-on Full-Stack Software Engineer to join the Model Development Platform. You will design, build, and operate the applications and services that support the development and testing of autonomous driving models.You will work across the full technology stack, own significant technical areas, mentor others, and contribute to...

Flok Health is seeking driven software engineers to join its in-person Cambridge team. You’ll build new features end-to-end (full-stack with frontend focus) and help scale consumer applications in a healthcare context.You’ll collaborate with product/UX, mentor junior teammates, and contribute to the technical roadmap while delivering reliable,...

Norton Rose Fulbright in London is looking for a Frontend-led Full-Stack Product Engineer to own user-facing applications for our AI-enabled R&D products.You’ll translate complex workflows into clear interfaces using TypeScript, React and Next.js, deploying to Azure with CI/CD. You’ll collaborate with AI engineers and data scientists within a small,...