Top Backend Developer Jobs in London

Develop and maintain backend services for Alta Video’s cloud-based distributed video security platform. Responsibilities include designing and implementing features, managing video cameras, access control systems and sensors, improving system capacity, maintaining CI/CD infrastructure and customer deployments, and delivering secure, high-quality code. The role requires collaboration within an autonomous agile engineering team and may involve cloud products, service-oriented architectures, AI, machine learning and computer vision.

Lead the design, development, and optimization of scalable backend services in Python and Rust. Architect distributed systems, improve reliability through monitoring and alerting, enforce testing and CI/CD best practices, and contribute to backend architecture decisions. Collaborate with product and engineering teams on complex projects, mentor engineers, and ensure the performance and stability of critical platform services.

Audit backend services, APIs, databases, queues, and data flows for scalability and reliability issues. Identify bottlenecks, document findings, and implement production fixes including code refactoring, schema redesign, caching, indexing, query optimization, and service restructuring. Partner with engineers through pairing, reviews, and handoffs. Conduct performance and load testing while improving system latency, resilience, and infrastructure efficiency.

Design, build, and operate backend systems for an AI platform: agentic workflows, document ingestion and search at scale, streaming execution, APIs and data models. Own features end-to-end from ideation to production, measure impact, and maintain services in production.

Lead the Managed Kubernetes Core team while remaining hands-on with backend engineering. Responsibilities include writing and reviewing code, leading technical projects, maintaining technical vision, participating in on-call and incident response, coaching 4–8 engineers, and collaborating on product strategy. The role focuses on Kubernetes control planes, cluster autoscaling, platform integrations, add-ons, GPU infrastructure, and managed cloud services.

As a Product Engineer, you'll build, iterate, and maintain scalable software systems, collaborating with cross-functional teams to deliver impactful products.

As a Backend Engineer, you will build payment infrastructure, tax engines, and systems for international commerce while collaborating with a team of experienced engineers.

Own and architect high-throughput Node.js payment microservices handling fiat transactions across multiple currencies and regulatory jurisdictions. Design resilient, traceable, idempotent, and reconciliable systems; lead banking and payment-partner integrations; and operate AWS infrastructure, CI/CD pipelines, databases, caching, monitoring, and on-call processes. Drive technical roadmaps, author design documents, mentor engineers, collaborate with Risk, Compliance, Product, and Operations, and maintain security and compliance standards for financial data.

Design, build and maintain backend services for real-time and analytical data processing. Own features end-to-end, optimise for low latency and high throughput, ensure observability and incident response, contribute to design reviews, and collaborate cross-functionally to maintain service health and scalability.

The role involves developing and maintaining back-end systems for e-commerce platforms using .Net technologies, ensuring data delivery and optimizing application logic. Responsible for integrating API services and enhancing application performance.

Develop high-quality backend software solutions, solving complex problems and collaborating with product teams on a scalable investment platform. Respond to technical issues in an on-call environment.

As a Backend Product Engineer, you will develop high-quality software solutions, collaborate with your team on technical decisions, and support product development. You'll manage scalability and maintainability of code for investor platforms, while responding to priority issues and driving innovation at Freetrade.

Design, build, and scale Node.js backend services for a MERN-based, real-time platform. Improve performance, reliability, and fault tolerance; design APIs and database schemas; collaborate on architecture, code reviews, and operational ownership. Mentor peers, contribute to hiring, and drive engineering standards.

Lead technical strategy and architecture for Learning Teams, drive end-to-end strategic initiatives, evolve core services for scalability and reliability, improve engineering practices and developer experience, mentor senior engineers, and make build-vs-buy and tooling decisions.

Build and maintain low latency trading services using Rust, ensuring efficient order management and performance optimization in a high-frequency trading environment.

As a Staff Backend Engineer, you'll lead the technical vision for Payments and Fulfilment systems, mentor engineers, and ensure scalability and security.

The Staff Backend Engineer will lead the technical vision for Depop's data platform, focusing on data ingestion, scalability, observability, and architecting data solutions while mentoring team members.

The Senior Backend Software Engineer will design, build, and maintain scalable backend systems. Responsibilities include collaboration with teams, API implementation, and ensuring best practices in software engineering.

Develop and optimize scalable backend microservices for a high-traffic digital gaming platform. Responsibilities include designing data models, APIs, integrations, and secure high-performance services; collaborating with technical and production teams; supporting deployment planning; solving technical challenges; and documenting limitations and learnings.

Design, build, and maintain high-scale backend systems and data APIs. Implement new endpoints and data feeds, write automated tests, monitor and operate cloud-native infrastructure, and collaborate with product and engineering to deliver and upgrade services.

The Senior Software Engineer will lead the development of backend systems for payment processing, collaborating with teams, setting goals, and fostering quality and ownership in code development.

Build and maintain secure CI/CD pipelines, infrastructure-as-code, cloud and blockchain security monitoring, container security controls, dashboards, secrets and key management, and secure configuration baselines. Partner with development teams to remediate security findings and improve infrastructure security. The role requires strong backend coding skills in Golang, Rust, or C++, cloud security expertise, containerization, CI/CD, infrastructure as code, and network security knowledge.

Own and deliver large-scale backend infrastructure projects end to end, including architecture, deployment, monitoring, and impact measurement. Build reliable distributed systems, performant APIs, database and processing systems, and production services that operate under heavy load. Contribute to code reviews, testing, rollouts, and mentoring while solving complex problems autonomously and planning for significant future scale.

As a Product Engineer focused on Backend, you'll enhance backend infrastructure, design APIs, improve reliability, and support innovative features at Granola.

The Software Developer will enhance liquidity access, develop data feeds, and ensure software stability while collaborating across teams. Responsibilities include coding, testing, and production support.