full stack javascript engineer jobs in London

Hayfin-Capital-Management seeks a seasoned Full-Stack Engineer to own and evolve the analytics workbench used for cross-team decision making. You’ll work across the full stack (Angular frontend, Python FastAPI backend) and coordinate with an offshore vendor team to keep delivery on track.This hands-on role targets teams shipping enterprise software with...

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...

Scale AI is seeking a Full Stack Software Engineer (Forward Deployed) to partner with public sector clients and rapidly build AI-enabled, full-stack applications. The role emphasizes delivering scalable, production-grade software integrated with AI models while working directly with customer infrastructure.Ideal candidates have 5+ years of post-graduate...

Stripe is seeking fullstack software engineers to build scalable products from a 0→1 stage within the Direct Surfaces Team. You will lead technical projects, design and maintain UIs and related APIs, and collaborate across teams to deliver features that scale with business needs.You should have 3+ years of industry experience, strong React and React Native...

Reelables is a London-based tech company building the world’s most advanced smart shipping labels and a platform to track shipments globally. You will own end-to-end delivery of customer-facing features, handling frontend and backend components and collaborating with customers to translate their needs into robust software.You’ll work across the stack,...

AJ Bell is seeking an experienced Full Stack Engineer to help architect, build, and deploy APIs, web apps, data layers, and third‑party integrations across the stack (NodeJS, React, PHP, .NET Core, MongoDB, SQL). You will work in a cross‑functional squad focused on engineering excellence and customer value.We value a DevOps mindset, TDD practices, and...

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 Full Stack Engineer - React/ Typescript - Python (VP)...

Hawksworth is seeking a hands-on Full Stack AI Engineer to build a new AI-native platform for the Energy and Oil & Gas sector. The role is remote with occasional travel to the London office, offering up to £90,000 base salary plus benefits such as private medical.You'll work on AI/LLM applications, agents, and APIs, with experience in Anthropic/Claude...

Vega is seeking a Full Stack Engineer to build features end to end across our platform, spanning Java/Spring Boot services and APIs to React and TypeScript interfaces. You will work with AI tools as a core part of development, bringing AI-powered capabilities into the product.This is a London-based, in-office role four days a week. We value practical backend...

DISCO is hiring a Senior Full Stack Engineer in London. You will lead design and implementation of scalable features, build secure APIs, and influence architecture alongside a small, high-impact team.The role requires deep Python/Django experience, REST API design, React.js expertise, and strong security sense. Hybrid work includes four days remote and one...

Scale’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 citizens Generating high-quality training data for custom LLMs Upskilling and advisory services to spread the impact of...

Pubitygroup in London is seeking a Full Stack Developer to build and enhance the Pubity Suite, an internal platform supporting major social brands. You will take ownership of the engineering work and make both technical and strategic decisions impacting various components of the business.The ideal candidate has over 4 years of experience in web application...

Airswift is seeking a Full Stack Java Engineer to support a large-scale application platform hosting 40+ business-critical apps. Based in the Netherlands, the role combines onsite and remote work across a hybrid setup, with a focus on modernising legacy systems using Java/Spring Boot and Angular.You will work with business stakeholders to translate...

Koch Ag & Energy Solutions in London is seeking a Senior-level Full-Stack Software Engineer to design and deliver scalable technology solutions for middle-office capabilities, including trading operations and data integrity.You will influence architecture and guide platform evolution while improving data quality, operational controls, and reliability. Based...

ChatBotKit is hiring a Full Stack Developer to design, build and deploy AI-powered applications from a fully remote setup. You’ll work on frontend (React/Next.js) and backend (Node.js/Python) with cloud infrastructure in AWS and Google Cloud, shaping scalable, secure features for enterprise clients.Ideal candidates bring 5+ years in full stack development,...

Full Stack Engineer / Developer (C# TypeScript Azure) London / WFH to £120kAre you a technologist with full stack development skills looking for an opportunity to make an impact at a scaling start-up?You could be joining a tech incubator funded by a major investment bank, working on complex cutting edge AI technology.As a Full Stack Engineer you'll join a...

BNY | Wealth Services Platform, a business unit within BNY, is a leading provider of financial business solutions for Wealth Managers / RIAs.  We offer industry-leading custody, advisory, portfolio management, trading and banking services as a white labeled software platform for our clients to serve their clients. Our commitment to excellence and innovation...

develop in London is seeking a Full Stack Engineer to join a fast-growing tech business focused on complex financial data and AI-enabled software. The role centers on React/TypeScript on the frontend and Java/Kotlin with Spring Boot on the backend, within a microservices framework.You’ll work across the stack, review AI-generated code, and drive...

sees.ai is building autonomous drone technology to change how infrastructure is inspected and managed. We deliver large-scale autonomous inspection programmes for National Grid and other operators, backed by Boeing and with a founding team from Apple, CERN and McLaren F1.We solve hard problems in autonomy, aviation and regulation and now tackle scale with...

A tech startup in Greater London is seeking a Full-Stack Engineer to join their small team. The ideal candidate will own the delivery of product features, write backend logic, and build user interfaces using React. The position requires 3-5 years of experience in software development and a strong proficiency in Python. This is an in-person role, offering...