Top Backend Developer Jobs in London

You will build backend infrastructure for a digital energy platform, working on real-time systems and customer energy pipelines while adapting to business needs

As a Senior Product Engineer, you'll build AI-powered workflows, enhance billing infrastructure, and ensure the reliability of production backend systems while collaborating with a small cross-functional team in a fast-paced environment.

Design and develop scalable server-side components, integrate APIs, automate workflows, and collaborate with teams on financial solutions.

The Software Engineer will develop AI-based capabilities, maintain software stacks, mentor others, and tackle engineering challenges across various technical fields.

Join Databricks as a Staff Software Engineer focusing on backend development, responsible for building reliable, high-performance services and features for data platforms, tackling challenges in distributed systems and service architecture.

The Senior Back-End Software Engineer will implement features, improve logic, write integrations with APIs, and contribute to design discussions within a startup environment.

Build, scale, and maintain backend APIs and services for a global media streaming platform. Collaborate with client teams, ensure performance and reliability, debug complex distributed systems, participate in architecture and code reviews, and join on-call rotations to maintain service availability.

Build zero-to-one healthcare products end to end, including React and TypeScript interfaces, Python services, and trustworthy LLM and voice pipelines. Rapidly prototype and validate ideas with clinicians, instrument usage and reliability, establish testing and observability feedback loops, and collaborate with product and commercial teams. Own projects from proof of concept through production, including infrastructure, migrations, dashboards, and handoff of successful products to established teams.

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.

Join a new London engineering hub to design, build, and maintain scalable backend services. Deliver features, ensure quality and maintainability, participate in agile teams, and grow across the Java/Spring cloud stack.

Build and maintain high-performance backend APIs and production software. Contribute to architecture decisions, mentor junior developers, conduct quality code reviews, and apply test-driven development and secure coding practices. Collaborate within Scrum teams on social investment, document and workflow management, AI-enhanced products, and legal template generation. Own features throughout the development lifecycle while monitoring web applications and agentic microservices.

Build and maintain high-performance backend APIs and contribute to architectural decisions within a Scrum team. Develop features involving social investment, document and workflow management, AI-enhanced products, and legal template generation. Participate in the full software development lifecycle, conduct effective code reviews, apply test-driven development and secure coding practices, and monitor production web applications and agentic microservices.

Join the Payments cross-functional team to design and deliver scalable backend services for millions of users. Own feature development from discovery to production, handle incident response, mentor engineers, collaborate with product and data teams, and promote DevOps, testing, and iterative A/B experimentation to continuously improve the product.

Design, develop, and operate Pigment’s production SaaS platform, with a focus on backend infrastructure. Translate functional requirements into elegant software, contribute throughout the application lifecycle, and improve infrastructure using Kubernetes, infrastructure-as-code tooling, and public cloud technologies. Collaborate closely with engineering teams and understand customer needs to deliver reliable, scalable product capabilities.

Lead and unify the agency's design technology practice, managing engineering teams, delivery across multiple engagements, technical strategy, architecture, standards, prototyping, AI-assisted tooling, and cross-disciplinary collaboration with designers and clients to ensure consistent, high-quality outcomes.

Build backend systems and data pipelines to process large-scale protein characterization data, design APIs to integrate lab instruments and robotics, and collaborate with scientists and automation engineers to turn molecular biology workflows into reliable, scalable software for automated wet-lab execution.

The Senior Backend Engineer will develop features, improve code quality, mentor others, and manage the development lifecycle while focusing on customer priorities and technical decisions.

Design, build and operate backend services in C#/.NET; own full development lifecycle, mentor teammates, improve reliability, observability, CI/CD, and scale microservices across AWS.

Design, build, and maintain transaction-related backend services using Java and Spring Boot. Develop core order and transaction workflows, ensure data consistency and system reliability under high concurrency, participate in requirements, design, and code reviews, and document technical solutions. Work onsite in London.

Build and scale backend systems for fintech products including bill pay, cards, and fraud detection. Design secure financial integrations, collaborate with frontend, product, and design teams, and deliver features from discovery through production. Improve architecture, performance, code quality, and engineering practices while sharing expertise across the team.

Build scalable backend systems for BJAK’s AI Finance Agent, including APIs, workflows, multi-provider insurance integrations, quote comparison and ranking, customer data systems, secure audit trails, cloud infrastructure, CI/CD, observability, and security controls. The role requires reliable handling of timeouts, retries, partial failures, sensitive data, and integrations across markets and partners.

Build and extend the platform layer: design shared backend services and APIs, improve reliability and correctness, collaborate with product teams to remove platform bottlenecks, mentor engineers, shape architecture and migrations, and write high-quality fullstack code with a backend focus.

Lead technical strategy and architecture for backend systems across multiple squads. Design and scale cloud-native, microservices, and database solutions (SQL), advise clients, mentor senior engineers, define technical standards, and champion pragmatic, secure, high-performance delivery while promoting knowledge sharing and engineering community development.

Build and maintain high-performance backend microservices (primarily in Go) for mapping: map-matching, ETA prediction, and routing. Migrate legacy services, optimize latency and reliability, collaborate with PMs, designers, and data scientists, and apply TDD/DDD and CI/CD practices.

Build and maintain scalable backend microservices (primarily in Go), migrate legacy systems, collaborate with product and data teams, and optimise system latency and reliability under heavy load.