Top Backend Developer Jobs in London

Build backend solutions for Wise’s recipient and contacts experience. Responsibilities include developing scalable services that support adding, finding, and managing recipients, collaborating with designers, product managers, and analysts in an autonomous agile team, and contributing to critical systems used across Wise’s international money transfer platform.

Lead backend engineering efforts to design, build, operate and secure cloud-native microservices. Deliver reliable, tested, scalable systems, manage stakeholders, coach engineers, support production incidents, and drive adoption of approved AI-assisted development practices.

Design, build, test, deploy, and operate mission-critical backend systems across the capital markets trade lifecycle. Translate business problems into measurable software outcomes, collaborate with product managers and stakeholders, and contribute to AI-enabled features. Own production reliability, monitoring, incident response, and quality while mentoring engineers and establishing technical standards. Work primarily with Kotlin, Spring, Postgres, Elasticsearch, Kafka, Kubernetes, and AWS in autonomous Kanban teams.

Build and maintain secure, performant backend services for GitLab’s Change Record team using Ruby on Rails and GraphQL. Develop APIs, data models, business logic, tests, and user-facing workflows while improving reliability through performance tuning, caching, observability, rate limiting, and resiliency. Collaborate across teams, support production systems through Tier 2 on-call, troubleshoot incidents, and use AI coding agents responsibly.

Design, develop, and maintain scalable backend services and REST APIs for Wise’s Payin Platform. Build payment orchestration and card pay-in systems handling high-volume financial transactions, using AWS, PostgreSQL, Kafka, and event-driven architectures. Optimize performance, implement automated tests, participate in on-call support, conduct code reviews, and ensure secure handling of financial data while collaborating across product and engineering teams.

Leads technical direction and hands-on execution for major products and systems. Designs scalable backend, frontend, API, database, and infrastructure solutions; writes code; drives architecture decisions; solves production issues; improves engineering quality, reliability, security, testing, and observability; and mentors engineers across teams.

Own technical direction and execution for major products and systems. Design scalable and reliable architectures, write production code, lead architecture decisions, solve complex engineering problems, and drive initiatives from concept through production. Improve engineering quality across testing, security, observability, and development practices while mentoring engineers and coordinating work across teams and products.

Lead and manage a cross-functional engineering team to deliver and scale customer-facing products. Own architecture, delivery, reliability, observability, and production outcomes. Coach engineers, run reviews, improve processes and tooling, and drive technical decisions across frontend, backend, APIs, databases, integrations, and infrastructure.

Lead and manage a cross-functional engineering team to deliver reliable, scalable wealth-management products. Drive architecture, code quality, observability, incident response, and engineering culture while coaching engineers and improving processes to increase delivery speed and reliability.

Lead and manage a cross-functional engineering team to design, build, and operate production systems. Own technical architecture, delivery, reliability, and processes. Coach engineers, run reviews, resolve incidents, and drive product outcomes while balancing speed, scalability, and quality.

Design and develop scalable backend systems for a global expense management platform supporting commerce, payments, issuing, ledgers, automated policies, administrative controls, and accounting integrations. Own features end to end from architecture and implementation through deployment, monitoring, troubleshooting, and operational support. Collaborate with engineering, product, design, and business teams while promoting high standards for scalability, testing, documentation, reliability, and code quality.

Design and evolve high-scale backend capabilities for GitLab’s container registry. Drive architecture, performance, reliability, security, APIs, testing, and operational readiness. Mentor engineers, influence technical direction, participate in incident response, and collaborate asynchronously across product, infrastructure, data, frontend, and security teams. Integrate and evaluate agentic AI systems in production engineering workflows while promoting responsible and effective use.

Design, implement, and evolve complex backend capabilities for GitLab’s global DevSecOps platform. Drive architecture and technical direction, improve quality, security, availability, performance, and operational readiness, and participate in incident response. Mentor engineers, lead through technical influence, collaborate asynchronously across product and infrastructure teams, and integrate reliable agentic AI systems into production engineering workflows.

Owns global technical recruiting for AI/ML, software engineering, infrastructure, web, and mobile teams. Responsibilities include developing recruiting strategy, leading critical searches, partnering with engineering leadership, setting hiring standards, building and coaching a technical recruiting team, improving recruiting processes through data and market intelligence, and expanding talent networks across the US, Europe, and Asia.

Design, develop, operate, and maintain reliable backend services for Teya’s ePOS platform. Own features throughout the software lifecycle, contribute to scalable architecture and event-driven systems, improve CI/CD and observability, troubleshoot complex production issues, and uphold security and testing standards. Collaborate with cross-functional teams, participate in code reviews, mentor engineers, and influence technical direction while supporting fintech and payments-related products.

Build and operate scalable backend services and data pipelines for Spotify’s music content ingestion platform. Responsibilities include ingesting and validating audio, metadata, lyrics, and partner content; designing stable APIs and schemas; improving data quality, real-time validation, reliability, and operational tooling; leading technical projects; participating in planning, code reviews, and on-call; and mentoring engineers while collaborating with content, partner, operations, and product teams.

Build and scale backend systems for Wise’s Product Eligibility platform, determining which products and features are available to customers. Responsibilities include shaping technical vision, developing distributed systems, designing APIs and database schemas, optimizing queries, supporting platform and back-office tooling, contributing to customer-facing flows, and collaborating in an agile team with product and analytics partners.

Designs and develops backend services for Trainline’s insurance products using C# and .NET. The role includes making technical decisions, mentoring engineers, owning software from development through deployment and monitoring, improving code quality, and removing delivery blockers. Responsibilities involve building scalable microservices and event-driven systems, working with AWS and infrastructure tooling, maintaining observability and reliability, and collaborating across engineering and product disciplines.

Lead backend development of Aether's core platform: design and build high-performance APIs, implement complex business logic, scale services for 3D modeling, simulation, and proposal workflows, and influence system architecture in an early-stage environment.

Build and operate AI backend systems, agentic workflows, RAG pipelines, evaluations, and LLM-powered data pipelines. Develop data-layer capabilities, monitoring, inspection interfaces, and production-grade software across Python, Dagster, PostgreSQL, Elasticsearch, and Iceberg. Collaborate with product, research, and commercial teams, own technical projects and PoCs, and balance security, quality, and delivery speed in a high-ownership startup environment.

Build scalable backend systems and customer-facing financial products for Wise’s shared-finance offerings, including international joint accounts and kid accounts. Collaborate with product, design, data, and research teams to shape ambiguous ideas, influence architecture and product direction, and deliver reliable systems globally. Work includes money movement, spending, authorization, compliance-related systems, shared-account infrastructure, greenfield development, and infrastructure scaling.

Build and maintain backend services and APIs supporting disputes, returns, refunds, auto-cancellation, and AI-driven customer support. Develop integrations with order, payment, shipping, and support systems; design reliable, secure, event-driven solutions; and own monitoring, on-call, testing, deployments, and technical debt. Collaborate with Product, Design, Data Science, Payments, Shipping, and CX Operations while running experiments and feature-flagged releases to improve customer issue resolution.

Build backend systems that make automated biology labs programmable. Responsibilities include architecting data pipelines for protein characterization data, developing APIs integrating laboratory instruments and robotics, and translating molecular biology workflows into reliable, scalable software. The role involves collaborating with scientists and automation engineers, processing heterogeneous physical-instrument data, and supporting highly autonomous AI-driven experimentation infrastructure.

Develop backend and full-stack products for digital journalism, using Scala, TypeScript, and AWS. Collaborate in a cross-functional team to design, build, test, and release features; contribute to product and technical decisions; promote engineering best practices; and support tools for journalists, content distribution, and commercial operations.

Design, build and operate backend services in AWS for a multi-service hospitality platform. Implement new features, payment and EPOS integrations, improve performance, monitoring and deployment automation using TypeScript/Node.js and databases like Mongo Atlas, Postgres RDS or DynamoDB. Collaborate in a UK development team and automate infrastructure, CI/CD and QA.