Top Full Stack Developer Jobs in London

Designs, builds, and operates scalable full-stack telecom platforms. Responsibilities include architecture, backend and frontend development, infrastructure as code, testing, deployment, observability, code and architecture reviews, production readiness, partner oversight, and collaboration with AI/ML, DevOps, infrastructure, and product teams.

Hands-on senior fullstack developer building backend-led JVM services (Kotlin/modern Java) and responsive React/TypeScript frontends. Design APIs, event-driven workflows, tests, CI/CD pipelines, observability, and contribute across discovery, deployment, production support, and technical decisions while validating AI-assisted tools where helpful.

Build and evolve TP ICAP’s next-generation Fusion Platform with AWS. Own software design, development, testing, deployment, and production support across full-stack services. Lead architecture discussions, improve engineering practices, mentor junior engineers, and deliver well-tested TypeScript applications using React, AWS, microservices, event-driven systems, APIs, databases, Terraform, and CI/CD. Collaborate within Agile cross-functional teams to refactor systems toward target architectures and maintain reliable low-latency services.

Build and architect scalable full-stack applications using React, Node.js, TypeScript, AWS, Terraform, and serverless technologies. Own frontend, backend, infrastructure, CI/CD, testing, and deployment across the application lifecycle. Use AI-assisted development tools, design event-driven architectures, and mentor junior engineers. Act as a consultative technical partner by translating business needs into secure solutions and presenting architectural guidance to client stakeholders.

Staff Full Stack Engineer responsible for architecting and building integration-heavy, event-driven systems for renewable energy products. The role focuses on backend development with Python and AWS serverless technologies, while contributing to React and TypeScript frontend work. Responsibilities include integrating pricing, tendering, data, billing, and risk systems; automating commercial workflows; delivering new product categories; solving ambiguous technical problems; and maintaining high standards for testing, documentation, and code quality.

Guide customers through onboarding, deployment, adoption, and optimization of Microsoft cloud solutions. Provide consultative technical guidance across Microsoft 365, Security, Endpoint, Copilot, Identity, Purview, and Data Protection workloads. Remove deployment blockers, mitigate risks, accelerate time-to-value, collaborate with engineering and partners, create reusable delivery guidance, and advocate for customer needs.

Lead architecture and implementation of scalable web applications across frontend and backend. Build responsive UIs, design and maintain PostgreSQL schemas, integrate AI features using LangChain, implement authentication with Clerk, and ensure reliability through Puppeteer end-to-end tests.

Design, build, test, and maintain end-to-end web applications and backend services. Translate customer requirements into deliverable engineering plans, develop secure and scalable features, collaborate across engineering teams, and manage functionality from testing through production. The role requires React and TypeScript expertise, REST API experience, automated testing, and a focus on clean, maintainable code and user experience.

Build and optimize scalable full-stack web applications using React, Python, JavaScript, and TypeScript. Deploy cloud-native solutions, preferably on Azure, integrate APIs, microservices, LLM-based services, and agentic AI systems, and support containerized environments and CI/CD pipelines. The role also emphasizes high-throughput applications, front-end performance, observability, and reliable deployments while collaborating with backend, cloud, and AI engineering teams.

Lead a small engineering pod building an internal Skills Marketplace MVP. Design and develop a full-stack application using Kotlin and Spring on the backend and React on the frontend. Collaborate directly with clients and stakeholders, lead day-to-day technical delivery, support adoption, and apply AI tools such as Claude to accelerate solution design. The role requires technical team leadership, full-stack development, user engagement, multidisciplinary collaboration, and a startup-oriented mindset.

Hands-on senior full-stack engineer delivering Java (Spring Boot) and TypeScript applications in complex, cloud-native environments. Lead modernisation, apply DDD and microservices, improve tooling, testing, and developer workflows, collaborate with stakeholders and platform teams, and embed AI-assisted development practices.

Build and support a full-stack energy trading platform covering physical commodities, derivatives, nominations, positions, and risk. Collaborate directly with traders and business users to translate requirements into production features, extend support for new markets and products, maintain the platform, and contribute to technical direction and code quality.

Build and maintain scalable full-stack web features for creative workflows, spanning frontend UX, backend services, data systems, and AI-assisted code or media generation. Work in an agile team using continuous delivery and TDD, implement metrics and security measures, solve complex problems independently, and mentor junior developers. Collaborate with product managers, artists, and creative directors while contributing to modern cloud-based products for advertising and brand management.

Build scalable, low-latency backend APIs, event-driven services, integration layers, and microservices supporting personalization and recommendation experiences. Partner with AI/ML and data engineers to deploy models, expose AI services, and develop React applications. Improve security, observability, reliability, performance, scalability, and operational efficiency while using AI-assisted engineering tools to enhance delivery and code quality.

Build full-stack, low-latency trading and pricing tools for options traders. Collaborate with traders, researchers, and business stakeholders to design intuitive frontends and scalable backend services, prototype and productionize distributed systems, and expand trading capabilities globally while improving performance, stability, and usability.

Build and operate scalable, low-latency backend services, APIs, event-driven systems, integrations, and frontend applications supporting membership, loyalty, rewards, and consumer engagement. Configure and integrate Antavo with commerce, CRM, CDP, marketing, and data platforms. Apply secure, observable, resilient engineering practices, troubleshoot production issues, and optimize performance. The role requires strong Java and Spring Boot expertise, plus working knowledge of React, Node.js, Kafka, and SQL/NoSQL databases.

Founding full-stack engineer responsible for building and owning the platform’s frontend, backend, APIs, integrations, and cloud architecture. The role involves making technical decisions, developing secure and scalable Python services, collaborating with founders on the product roadmap, and delivering rapidly in an ambiguous early-stage startup environment. This is the company’s first engineering hire, with potential progression to VP of Engineering.

Build and maintain Ergodic AI’s AI platform across back-end and front-end systems. The role involves developing with Python web frameworks and JavaScript/TypeScript, integrating with client technology stacks and workflows, applying AI, ML, and LLM concepts, and contributing to DevOps, cloud deployment, testing, and infrastructure practices. As an early-stage hire, the engineer will help shape the product and solve complex data and AI challenges.

Build and operate full-stack web applications end to end, from technical design through production release and support. Direct and verify coding agents, create tests and safeguards, review changes for design and security, respond to production issues, maintain alerting and runbooks, and document systems. The role requires strong ownership, independent technical judgment, collaboration, and excellent English communication. Vue, TypeScript, AWS serverless, EdTech, and UI/UX experience are useful but not required.

Design, build, and operate full-stack systems for biosample tracking, chain of custody, data processing, and laboratory integrations. Develop TypeScript/Node.js services, modern frontend interfaces, infrastructure, and database solutions in Azure. Collaborate with cross-functional stakeholders, manage production operations, troubleshoot incidents, promote software quality, and mentor engineers.

Build and operate frontend-led full-stack products for legal R&D, using TypeScript, React, Next.js, backend APIs, Azure services, and AI integrations. Own frontend architecture, accessible user experiences, reusable component libraries, authentication, enterprise integrations, deployment, monitoring, testing, security, and continuous improvement. Collaborate with AI engineers, data engineers, data scientists, designers, lawyers, and business stakeholders to deliver document-heavy, search, workflow, and AI-assisted applications.

Build and maintain scalable full-stack applications using React, Redux, and Python backend frameworks. Design RESTful APIs and data-processing systems for high-volume network telemetry and time-series data. Develop AI-driven workflows that detect outages and automate network operations. Collaborate with product, platform, and cloud engineering teams on infrastructure, CI/CD, deployments, code quality, and system reliability. Mentor engineers and work directly with global telecommunications customers.

Build and maintain full-stack products using Python, React, GraphQL, and modern cloud technologies. Develop APIs, integrate internal and third-party services, create performant frontend applications, and deliver robust, scalable software across browsers and devices. Collaborate within cross-functional teams, contribute to design systems and component libraries, own features from inception through delivery, and promote maintainable coding practices. Bonus experience includes TypeScript, Next.js, AWS, infrastructure as code, event-driven systems, and AI tooling.

Lead architecture and technical strategy across multiple product teams while building and shipping full-stack features. Mentor engineers, promote AI adoption throughout the software development lifecycle, deliver LLM-backed capabilities, guide system evolution, own release processes, and support reliable continuous deployment. The role works across mobile, backend, integrations, cloud infrastructure, and production support while collaborating with Product, Design, and Engineering leadership.

Develop and deploy greenfield full-stack services supporting trader workflow tooling for Citi’s Strategic Equity Solutions business. Responsibilities include designing scalable software, collaborating with business stakeholders, writing high-quality code, mentoring engineers, evaluating new technologies including AI tools, and owning the full software lifecycle through testing, deployment, and monitoring. The role emphasizes Python or Kotlin backend development, frontend frameworks, microservices, Kubernetes, OpenShift, and DevOps practices.