Top Full Stack Developer Jobs in London

Build and maintain full-stack SaaS features across backend and frontend: develop scalable Python and .NET services, create React/TypeScript UIs, design and integrate REST/gRPC APIs, support cloud-native deployments, production monitoring, incident resolution, and apply security, CI/CD, and testing best practices while collaborating with product and business stakeholders.

Build and operate scalable full-stack systems that prevent fraud, account takeovers, scams, and financial crime. Own projects end to end, develop customer-facing security controls, improve transaction monitoring and detection capabilities, and collaborate with Product, Design, Data Science, and Investigations. The role requires Java or JVM expertise, Spring, modern frontend development, distributed systems, databases, CI/CD, testing, strong product judgment, and mentoring junior engineers.

Design and deliver enterprise-grade machine learning systems and AI-powered applications for banking. Build scalable, secure, distributed applications and automated cloud, desktop, and ML pipelines. Apply MLOps practices for versioning, reproducibility, and observability while collaborating with cloud and site reliability engineering teams. Develop reusable libraries and business-critical, data-intensive solutions, aligning machine learning problems with business objectives. The role may include mentoring or people leadership.

Lead technical strategy, architecture, and delivery for a large-scale risk analytics and reporting platform. Design scalable Java and React-based applications, govern frontend architecture and design systems, integrate enterprise platforms and data sources, and drive reliability, resiliency, observability, security, and compliance. Partner with Risk, Product, Data, Architecture, and Engineering stakeholders while evaluating AI, machine learning, and generative AI capabilities for analytics, automation, and decision support.

Leads full-stack software development across React or Angular frontends and Node.js/TypeScript backends while owning application lifecycle, risk, controls, resiliency, security, compliance, and operational governance. Designs, tests, deploys, and supports production systems; coordinates disaster recovery and technology refresh activities; mentors engineers; promotes AI-assisted development; and partners with risk, controls, and product stakeholders in an agile environment.

Develop and maintain data pipelines and business applications to support model risk governance. Implement model performance monitoring, workflow automation, and LLM-enabled solutions using Python and web frameworks. Emphasize data controls, testing, AI-assisted development tooling, and collaboration with cross-functional stakeholders to deliver secure, reliable analytics and efficiency tools.

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.

Develop and test cloud-based full-stack applications and prototypes using Java, Spring Boot, Python, TypeScript, Angular, and Azure. Build REST APIs, integrate microservices and event-driven systems, create accessible responsive interfaces, contribute to CI/CD and automated testing, and apply secure coding practices. Collaborate with architects, data engineers, and UX designers during discovery-phase projects. The role requires active SC clearance and occasional travel to London.

Design, implement, and deliver full-stack features for the Validus Horizon platform. Build and maintain ETL/data pipelines and integrations, own small-to-medium projects, improve system performance and scalability, collaborate with stakeholders and clients, mentor team members, and present technical solutions and roadmaps to drive product and client success.

Develop and guide the front-end architecture for Neo4j’s Virtual Graph product using React, while contributing across backend services, cloud infrastructure, database connectivity, and query systems. Build complex data-rich applications that translate Cypher queries into SQL for cloud data platforms. Collaborate across the full stack, mentor engineers, and help scale maintainable software toward general availability.

Design and develop full-stack web services for a platform automating complex private-asset lifecycle management. Build scalable, resilient front-end and back-end components using Java Spring Boot and Angular TypeScript, with strong automated testing and documented APIs. Collaborate with cross-functional Agile teams, conduct code reviews, and support high availability, performance, usability, and external integrations. Blockchain, Solidity, and EVM experience is advantageous.

Develop and maintain internal and public-facing web applications across cloud, data center, and serverless environments. Build greenfield and legacy systems using C#, React, TypeScript, SQL Server, Next.js, monoliths, and microservices. Apply code reviews, testing, modern Git workflows, and continuous delivery practices. Collaborate on project goals, make pragmatic technical decisions, integrate APIs, and mentor junior developers.

Design, develop, test, and deploy scalable full-stack applications on Google Cloud Platform. Build cloud-native applications, APIs, data services, microservices, and modern user experiences while supporting architecture, modernization, automation, and continuous improvement. Collaborate with clients, architects, and distributed teams to deliver secure, high-performance enterprise solutions using Agile, DevOps, CI/CD, and Google Cloud technologies.

Design, build and maintain Microsoft Cloud applications using Power Apps/Pages and Azure services. Implement Entra ID authentication, Azure Functions/App Services, Logic Apps and Blob storage. Create Azure Data Factory pipelines and APIs (REST/GraphQL), integrate external services and LLM data pipelines, and ensure performance, security, and scalability while collaborating with customers to turn requirements into streamlined apps.

Build and scale AI-powered systems in cross-functional teams. Responsibilities include developing scalable frontend and backend architectures, deploying machine learning outputs into production, building data pipelines and cloud infrastructure, and advising customers on complex technical requirements. The role requires ownership across the application lifecycle, balancing rapid prototyping with maintainability, and collaborating with data scientists and product managers.

Lead the design, development, and operation of full-stack platform capabilities spanning frontend applications, backend services, APIs, cloud infrastructure, and AI/ML integrations. Responsibilities include architecture and code reviews, technical leadership, production delivery, scalability, security, observability, continuous delivery, and collaboration with AI, infrastructure, DevOps, product, and external delivery teams.

Build and deploy a modern AI-integrated application on Google Cloud. Develop responsive React and TypeScript interfaces, scalable Python and FastAPI APIs, Cloud Run services and asynchronous Cloud Run Jobs. Integrate Vertex AI Gemini models for data extraction and risk assessment, manage Firestore and BigQuery, configure enterprise SSO with IAP and Microsoft Entra ID, and maintain Azure DevOps CI/CD pipelines.

Lead architecture and hands-on development of backend and API platforms supporting ecommerce, loyalty, clienteling, and customer personalization. Build scalable Node.js and TypeScript services, integrations, microservices, and event-driven systems across commerce, payments, fulfillment, CRM, analytics, and digital experience platforms. Own API governance, security, observability, DevOps automation, and cloud infrastructure while mentoring engineers and shaping technical standards and roadmaps.

Leads design and implementation of scalable full-stack features, secure REST APIs, and production software. Responsibilities include incident response, on-call support, security compliance, technical debt reduction, code reviews, testing, architecture best practices, and mentoring. The role requires strong Python, Django, PostgreSQL, React, API development, and application security expertise, with a hybrid London work arrangement.

Hands-on senior software engineer responsible for designing, developing, testing, deploying, monitoring, and supporting BlackRock’s cloud-native Private Markets platform. The role involves Java backend and React/TypeScript frontend development, scalable APIs and services, event-driven workflows, architecture evolution, CI/CD, incident investigation, and secure data-centric systems. The engineer will use AI-powered development tools and integrate AI capabilities into products while collaborating with engineering, product, architecture, and QA teams.

Design, build, test, and maintain scalable full-stack web applications and integrations using Java, Python, and React. Implement AI-enabled features, event-driven data pipelines, and marketing integrations (CDP/CRM/CMS). Improve code quality via AI-assisted tools, CI/CD, observability, and security/compliance best practices while collaborating with product, marketing, and partners.

Lead the architecture and development of scalable, secure, accessible frontend and fullstack web applications. Establish UI engineering standards, reusable component libraries, design system adherence, API and backend integrations, testing, performance, CI/CD, and security practices. Collaborate with product, UX, backend, infrastructure, and security teams to deliver complex technology initiatives. Provide technical leadership, mentor engineers, resolve complex system challenges, and ensure compliance with enterprise architecture and risk controls.

Build and scale Stripe Treasury money movement products across UIs, APIs, and services. Lead technical projects, design product features, collaborate cross-functionally, make strategic infrastructure decisions, and balance business priorities with user experience and sustainable technical foundations. Mentor engineers and contribute to short- and long-term product roadmaps.

Develop frontend and backend systems for the Guardian’s publishing and journalism engineering stream. Build products for showcasing journalism, journalist tools, and content distribution services. Collaborate in cross-functional teams, contribute to product and technical decisions, pair program, release features rapidly, and develop skills across teams and technologies. The role typically uses TypeScript and Scala and follows a hybrid schedule with one office day per week in King’s Cross.

Build and scale Base360.ai’s short-term rental platform across frontend, backend, integrations, automation, dashboards, and AI-powered workflows. Work directly with customers, founders, and designers to identify problems, ship end-to-end solutions, and improve product outcomes. Develop reliable APIs, event-driven automations, cloud infrastructure, and integrations with Airbnb, Stripe, Twilio, OpenAI, and other platforms. Own features from discovery through deployment while balancing usability, security, scalability, and maintainability.