full stack developer jobs in London

FTSE Russell (LSEG) is building next-generation distribution capabilities that deliver index data to the global financial community — across APIs, cloud platforms, and modern data delivery channels We’re looking for a hands‑on Senior Engineer to design and scale the systems that power this distribution — enabling reliable, secure, and...

Model ML is an AI workflow platform transforming how financial institutions automate client-ready processes. We are seeking a highly skilled Full-Stack Engineer with 5+ years of professional experience to join our growing team.You will design and build scalable web applications using React and Next.js, with Python backend services, and contribute to...

Maxwell Bond is seeking a Senior Full Stack Developer to join a fast-moving HealthTech team building a new customer-facing platform using C#/.NET, React and Azure. You'll own significant parts of the backend and frontend, contribute to architecture decisions, and ship deliverables with an API-first approach.You'll work in a remote-first environment with...

Unmind is hiring a Software Engineer (Full Stack) on a 9-month parental leave cover. You will ship features end-to-end for enterprise clients, shaping the product with AI-assisted development using Claude Code.The role spans the stack—TypeScript, React, GraphQL, Node.js, Python, Golang, SQL—and emphasizes reliability, security, and observability. We...

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...

Crisil is seeking a Senior Full Stack Engineer to build and support market data platforms in a Global Markets context. You will work on end-to-end solutions across UI, APIs and data layers to support data analytics, distribution and usage workflows.The role requires strong full-stack experience, exposure to market data systems and the ability to operate in...

Gazelle Global Consulting Limited is hiring a Full Stack Python Developer for a 12-month contract in London with hybrid work (3 days onsite). You will work across backend and frontend, building scalable Python/Flask services, REST APIs and modern JavaScript applications.You’ll collaborate on full-stack development, integration, deployment and production...

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...

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...

Selby Jennings is hiring a software engineer to design and enhance trading platforms. The role covers front-end work with React and TypeScript as well as backend services in Java, supporting order routing and execution workflows across a global platform.You will collaborate with quantitative research, execution and trading teams to deliver new functionality...

Taktile is hiring a Full-Stack Engineer to build features across the AI agent platform, from the backend runtime to the frontend UX. You will work with Python (FastAPI) on AWS serverless, and React/TypeScript on the frontend, delivering production features and improving reliability.The role is hybrid, requiring at least 3 days per week in London, Berlin, or...

OpenAI is seeking a Fullstack Engineer focused on child safety to build data-intensive, AI-powered applications and infrastructure. You will work with operators and investigators to enable faster, safer workflows.You’ll develop across the stack, from UIs to pipelines, and adapt to ambiguous environments while handling sensitive content. Experience with...

Build Circle Ltd in London is seeking a Lead Technology Consultant to own delivery outcomes and set technical direction for client engagements. You’ll be hands-on across backend (.NET/Java), frontend (TypeScript/JS), and the delivery pipeline, ensuring robust solutions.You’ll spend much of your week working with client teams, sometimes remotely,...

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...