Top Full Stack Developer Jobs in London

Build, deploy, and maintain full-stack AI applications, services, and data pipelines for enterprise use. Collaborate with data scientists, machine learning engineers, research scientists, and technical teams to productionize AI products. Develop secure, scalable, resilient software; maintain APIs and backend services; conduct code reviews; troubleshoot complex issues; apply CI/CD and software security practices; and support LLM applications using retrieval-augmented generation and prompt design.

Build and support full-stack features for Preqin’s cloud-based private markets platform. Develop scalable backend services with Python and .NET, create React and TypeScript frontends, design APIs and microservices, and contribute to cloud-native architecture. Responsibilities include production monitoring, incident resolution, automated testing, CI/CD, code reviews, information security, and collaboration with product and business stakeholders.

Drive architecture and implementation of scalable, multi-tenant embedded finance infrastructure using React and TypeScript. Own cross-domain features, design integrations for enterprise customers, collaborate with Product/Design/Compliance/Sales, and optimize for performance, maintainability, and production excellence to support high-scale fintech customers.

Build frontend-focused, full-stack features for Cisco ThousandEyes’ Endpoint platform. Develop intuitive interfaces for troubleshooting network issues and analyzing endpoint experience data, while contributing to APIs, data flows, and backend services. Collaborate with product managers, designers, and engineers to deliver reliable, accessible, high-performance solutions. Work with real-time, high-volume data streams and asynchronous events while expanding expertise in endpoint data processing and presentation.

Build and own polished full-stack product features from problem definition through production. Responsibilities include making interface decisions, developing with Python, FastAPI, PostgreSQL, Next.js, and TypeScript, using AI and LLM tooling, modeling production data, writing SQL, safely changing live data, and working autonomously with users and stakeholders. The engineer will maintain quality, handle ambiguity, and deliver software for theatrical rights and royalty operations.

Design, develop, and deliver frontend (React) and backend services; produce architecture artifacts; analyze large data sets and visualizations; improve code quality and system resiliency; mentor junior engineers; use enterprise-authorized AI-assisted development tools; contribute to engineering communities and continuous improvement of infrastructure platform services.

Build and ship full-stack software across instrument control, data infrastructure, APIs, databases, security, user interfaces, and agentic AI tools. Work end-to-end with scientists and customers, turning ambiguous problems into production features. The role involves hardware integration, cloud data pipelines, access control, and rapid product delivery, with ownership from scoping through release.

Lead customer-facing delivery of production-grade data and AI solutions on Databricks. Own architecture and design decisions, build end-to-end data pipelines and applications, integrate ML/AI models, guide enterprise customers, manage technical delivery, and contribute reusable frameworks and product feedback. The role requires strong distributed computing, cloud, coding, CI/CD, MLOps, stakeholder management, and technical project delivery skills. Travel to customers is approximately 20%.

Build and scale AI-powered financial adviser tools, including chat agents, AI-assisted meeting notes, and Elm user interfaces. Design, implement, test, and launch user-facing features while contributing to systems architecture, database design, code reviews, and product decisions. Work remotely with engineering, product, and design teams using Elixir, Phoenix, Elm, AWS Bedrock, and LLM technologies. Help evaluate, debug, and improve non-deterministic AI systems and agent workflows.

Build and enhance full-stack features for Zoopla’s property marketplace. Develop React or React Native frontends and Node.js backend services using TypeScript, GraphQL or REST, and SQL or NoSQL databases. Design scalable, secure, observable systems, contribute to architecture decisions, testing, code reviews, and cloud infrastructure using AWS and Terraform. Collaborate cross-functionally, improve product outcomes, work autonomously in an agile environment, and use AI tools to prototype and deliver solutions efficiently.

Build and deploy full-stack product features across frontend and backend using TypeScript and Python. Design APIs, influence architecture, collaborate with product and design, and manage features end to end. Apply test-driven development, CI/CD, and automated testing practices while improving system availability, security, reliability, and user experience. Work in a collaborative, agile, product-driven environment with AWS and modern web technologies.

Build and optimize GitLab’s self-service growth funnel across registration, trials, onboarding, upgrades, and purchases. Develop backend services in Ruby on Rails and frontend experiences in Vue.js, design and analyze experiments, improve experimentation tooling, and use product data to guide decisions. Collaborate asynchronously with Product, UX, Data, and Engineering teams while owning features through production and measuring their impact on customer outcomes.

Build and scale AI-powered production systems across the frontend and backend. Responsibilities include designing scalable architectures, leading engineers, creating maintainable project frameworks, providing full-stack technical authority, deploying software, and advising clients on complex technical requirements and architecture.

Build and maintain scalable full-stack enterprise systems using modern frontend, backend, database, API, microservices, and cloud technologies. Responsibilities include architecture, feature development, code reviews, performance optimization, monitoring, troubleshooting, L3 support, documentation, stakeholder collaboration, and project estimation. The role requires strong experience with React or similar frontend frameworks, backend development, SQL or NoSQL databases, REST or GraphQL APIs, microservices, and AWS or Azure.

Leads architecture and development of scalable, secure, accessible frontend and fullstack enterprise applications. Establishes UI engineering standards, reusable component libraries, design system adherence, automated testing, performance practices, and CI/CD governance. Designs API and backend integrations using REST, GraphQL, BFF layers, and microservices. Collaborates with product, UX, backend, infrastructure, and security teams; resolves complex technical problems; ensures cybersecurity and compliance; and mentors engineering teams.

Build scalable network automation applications across frontend and backend. Collaborate with network engineers and stakeholders to define requirements, implement modular UIs and services, maintain code quality, testing, CI/CD, documentation, and adopt best practices and tooling within Agile delivery.

Build and ship scalable full-stack software across the product lifecycle, from requirements and system design through implementation, QA, deployment, and monitoring. Translate business goals into high-impact features, challenge assumptions, communicate with stakeholders, and maintain clear, scalable architecture. Work in a fast-paced fintech environment using modern development tools and product-first engineering judgment.

Design, develop, and deliver full-stack customer-facing platforms and microservices. Build AWS serverless services, APIs, event-driven components, and React applications using TypeScript and Python. Apply DevSecOps, Infrastructure as Code, CI/CD, automated testing, secure development, and observability practices. Support production systems, troubleshoot incidents, improve reliability, and collaborate with Product, Delivery, and Engineering teams on sprint commitments and continuous improvement.

Lead end-to-end development of scalable Java and Angular applications supporting equity derivatives and structured products. Design distributed systems, REST APIs, microservices, and event-driven architectures; modernize legacy platforms; apply AI-assisted engineering; and lead architecture, testing, production support, and incident resolution. Partner with trading, sales, operations, risk, and technology teams globally while mentoring engineers, setting standards, and driving platform strategy.

Develop and maintain secure, scalable Python backend services, REST APIs, relational database solutions, AWS resources, and automated testing frameworks. Contribute to frontend development using JavaScript and Next.js, troubleshoot application issues, and collaborate with software, QA, and platform engineers. The role supports genomic analysis and clinical decision-making through the Decision Support System used for whole genome sequencing interpretation.

Build, test, deploy, and iterate on full-stack product features from end to end. Work directly with users through community channels, prioritize improvements based on feedback, make trade-offs under ambiguity, and contribute to product direction, company strategy, engineering culture, security, and team collaboration. The role uses TypeScript, React, Node.js, SQL, Docker, and GCP in a hybrid London environment.

Build and ship scalable full-stack product features across the platform using modern JavaScript and TypeScript technologies. Collaborate with Product, Design, and engineering teams on technical decisions, maintain and optimize cloud systems, write automated tests, and own features from concept through production. The role emphasizes product thinking, clear communication, continuous learning, and contributing to a collaborative engineering culture.

Develop and maintain scalable frontend and backend systems for international investment-platform launches. Build Golang services, APIs, microservices, and React/TypeScript applications; integrate KYC, payments, banking, brokerage, and custody platforms; and localize onboarding, funding, investment, and withdrawal workflows. Collaborate with product, operations, and compliance teams to deliver secure solutions, while contributing to testing, deployment, troubleshooting, documentation, performance, and reliability improvements.

Build and ship reliable full-stack identity and access management features for internal and external users. Develop authentication, authorization, SSO, OIDC, SCIM, account, consent, and session-management services. Write production-ready, tested code; participate in code reviews, design discussions, incident response, and postmortems. Collaborate across teams, monitor services, improve operational health, and use AI-assisted development tools to accelerate delivery.

As a Senior Software Engineer, you'll shape product features, write backend and frontend code, improve infrastructure, and support integrations in a collaborative environment.