Top Full Stack Developer Jobs in London

Build and maintain React front-end components and responsive UIs for a control plane; orchestrate agentic harnesses (Claude) to generate, validate, and test code; contribute to Python/FastAPI back-end APIs; create templated archetypes and golden-path tooling; collaborate with UX; ensure performance, security, and testing-first maintainability.

Build and operate end-to-end product features across the full stack, from design and architecture to production. Ship high-impact software, maintain code quality, work with LLMs/agents and search/OCR pipelines, and collaborate in a fast-paced, startup engineering team.

Design and implement a cloud platform to manage a fleet of humanoid robots, build backend APIs and robot-side services, deploy secure infrastructure (CI/CD, containers, IaC), implement observability and testing pipelines, automate workflows, and maintain documentation.

Lead full-stack development and co-manage a lean engineering team to build SunCore's web and mobile infrastructure. Implement CI/CD, migrate hosting to DigitalOcean with Cloudflare, migrate CRM to HubSpot via Zapier, integrate multiple APIs and third-party services, and deliver a secure Flutter mobile app and dashboard with SOC2-level security, 2FA/biometric login, and wallet integrations.

Develop and enhance JavaScript applications for personalized photo gifts, working on both front-end and back-end technologies, including Azure and AWS.

Lead end-to-end project lifecycles in AI and robotics, developing software solutions and integrating technologies to enhance the F&B experience at Kaikaku.

Design and implement front-end and back-end services for a scalable platform managing private assets lifecycle. Collaborate with cross-functional teams, build Java Spring Boot and Angular components, ensure automated test coverage, expose documented APIs, optimize performance/resilience, and conduct peer code reviews.

Build and maintain full-stack internal systems supporting iwoca’s German operations, including underwriting, customer communication, collections, and account management tools. Design backend services in Python, contribute to React and TypeScript codebases, modernize architecture, automate workflows, and improve system quality and reliability. Own projects end to end by engaging stakeholders, shaping solutions, making trade-offs, and evaluating outcomes through data and usage metrics.

Core full-stack engineer responsible for assessing requirements, delivering front-end and back-end features, writing testable code and automation, deploying software, contributing to architecture, and QA, debugging and documenting code.

Design and implement privacy-first full-stack systems to keep user location data inaccessible. Work across React/TypeScript frontends and Node.js or Go backends, collaborate with product and design, and deliver well-tested production features.

The Senior Software Engineer II will architect, build, and deliver new features, collaborate with teams, mentor engineers, and improve developer tooling while leading deployment processes.

As a Full Stack Product Engineer, you will develop user-facing features, optimize application performance, collaborate with a team, and engage with users to enhance the product.

The Senior Full Stack Engineer will design and build scalable microservices in Go, develop React components, and collaborate on product solutions while ensuring code maintainability and quality.

As a Senior Full-Stack Engineer, you'll design and maintain backend services, collaborate with teams, and implement technical solutions while ensuring performance and security through best practices.

Lead design and delivery of scalable full-stack features, influence system architecture, maintain and optimize cloud systems, guide and mentor engineers, drive product-focused technical decisions, and ensure high quality through testing and CI/CD practices.

As a Senior Software Engineer, you will enhance performance and reliability of Encord's platform, manage projects from architecture to deployment, and collaborate with teammates to solve complex problems in AI data management.

The Full Stack Developer role involves building and maintaining web applications using Angular and C#, contributing to UI architecture, backend services, and engaging with business teams for requirements and solutions.

Lead development and scaling of the Payments Experience web application and platform tooling. Design services via RFCs, own end-to-end development, containerization, deployment, and maintenance. Ensure test coverage, observability, CI/CD and IaC. Mentor junior engineers and collaborate cross-functionally to deliver high-quality, customer-facing features.

Develop and maintain backend services using TypeScript and Node.js, focusing on scalable event-driven architecture and modern microservices practices while collaborating with teams to solve complex business problems.

Design, develop, and maintain cloud-based applications; provide technical leadership; manage junior team members; engage in agile project management.

Lead architecture and full-stack development of AI-powered platforms, build scalable frontend and backend systems, mentor engineers, translate client problems into production-ready solutions, and ensure high code quality and reliable deployments.

The role involves developing and managing key components of Sphere's platform, such as the tax engine and filing infrastructure, while mentoring other engineers and improving efficiency based on customer feedback.

Build and ship backend-leaning fullstack features (APIs, services, integrations, React frontend). Scope solutions, implement, and own features end-to-end. Collaborate with product and design, contribute to architecture and technical discovery, ensure scalability, reliability, and security best practices, and improve developer experience and tooling.

Lead design and development of internal and customer-facing systems across underwriting, claims, finance, and compliance. Own backend services, APIs, and scalable infrastructure; drive architecture, deployment, reliability, and performance; automate workflows with product and operations partners; mentor engineers and set engineering best practices.

Lunos seeks Senior Product Engineers to build AI-driven products that enhance accounts receivable management, utilizing a modern tech stack across different engineering domains.