Top Backend Developer Jobs in London

Backend Software Engineers at Palantir build and maintain scalable backend services, develop APIs, optimize applications for performance, and collaborate across teams to shape user workflows.

Backend Software Engineers at Palantir build scalable software solutions, collaborate across teams, and develop systems for data processing and storage, enhancing product capabilities.

The Senior Backend Software Engineer will design, develop, and maintain scalable backend services, optimize applications, build APIs, and collaborate across teams to improve user workflows and product efficiency.

The Senior Backend Engineer at Teya will design, develop, and maintain core backend systems supporting various aspects of the business, ensuring scalability and reliability while collaborating with cross-functional teams and mentoring developers.

Lead backend engineering for Consumer Onboarding: shape roadmap, deliver high-impact projects end-to-end, ensure system health, coach and mentor engineers, and collaborate with product, design, and analytics to improve onboarding flows at scale.

Build backend services for customer-facing financial insights, including spending summaries, travel insights, budgets, and recurring-payment tracking. Develop high-throughput streaming and storage systems using Java, Spring Boot, Kafka, and stream processing. Improve transaction categorization accuracy, deliver low-latency APIs, and own services through development, deployment, production operations, and on-call support. Write tests and documentation, review code, and collaborate across backend, mobile, web, product, and design teams.

Design, build, and own backend pricing services end-to-end for Personal & Business products. Contribute to architecture, code reviews, reliability, scalability, observability, incident response, and collaborate with product, compliance and stakeholder teams to enable pricing features and experiments.

The Senior Backend Software Engineer collaborates in teams to design and build scalable infrastructure systems, optimizing data-driven applications across sectors.

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.

Lead backend engineering work using JVM languages to design scalable, reliable, secure, cloud-native, multi-cloud solutions. Drive domain modeling, performance optimization, zero-downtime releases, incident resolution, and operational excellence. Champion adoption and governance of enterprise-authorized AI-assisted engineering practices and SDLC toolchain automation while coaching teams on responsible, secure AI use.

Lead backend engineering efforts to design, build, and operate scalable, reliable, and secure cloud-native services using JVM languages. Drive domain modeling, performance optimization, zero-downtime releases, incident remediation, automated testing, and adoption of approved AI-assisted engineering practices while mentoring teammates and promoting reusable patterns.

Design, build, and maintain scalable, secure, cloud-native backend systems using JVM languages. Ensure reliability, performance, and zero-downtime releases; use domain modeling, automated testing, and enterprise AI-assisted tools to improve code quality and delivery.

Design, build and operate cloud-native backend microservices (Java) for banking products. Ensure secure, reliable, scalable systems with strong testing, performance tuning, zero-downtime releases, and production support including incident management.

Lead design and deliver cloud-native backend microservices with reliable, secure, and scalable architectures. Build and test end-to-end solutions, operate production systems, drive AI-assisted engineering practices, coach engineers, manage stakeholders, and ensure high availability, performance, and secure data handling across the product lifecycle.

Manage a cross-functional engineering team building GitLab Duo Chat's AI-powered features. Define requirements with product and UX, contribute to architecture for scalable agentic AI, drive delivery and roadmap execution, improve testing, observability, performance, and coach engineers to foster an inclusive, high-performing team.

Manage end-to-end firmware feature delivery for residential EV chargers: define scope, coordinate cross-functional stakeholders, own release readiness and rollouts across variants and markets, set success metrics, oversee testing, monitoring and multi-market launches, and translate local requirements into firmware scope.

Lead and grow a multi-disciplinary engineering team (Backend, iOS, Android, Web), set technical and product strategy, mentor engineers, scale engineering practices, participate in code reviews and design, and collaborate across Product, Design, and Operations to deliver high-impact projects.

Lead development projects focusing on customer experiences and operational management. Mentor other engineers, make strategic tech decisions, and solve complex challenges while contributing high-quality code.

The role involves hiring exceptional engineers who can handle ambiguous problems, build end-to-end solutions, and ensure production-grade quality. Candidates should thrive in evolving environments.

Build and operate GitLab’s Gitaly backend storage systems, focusing on distributed storage, Git repository management, reliability, scalability, performance, and observability. Own complex technical initiatives end to end, lead system design, collaborate across engineering and customer-facing teams, mentor engineers, improve development practices, respond to incidents, participate in on-call duties, and implement operational improvements for production systems.

Build and maintain secure, scalable Flow Registry features for GitLab’s agentic platform using Python, LangChain, and LangGraph. Design GraphQL and REST APIs, improve automated testing, optimize PostgreSQL-backed applications, and collaborate across backend, frontend, product, UX, and AI teams. Participate in Tier 2 on-call support, troubleshoot production issues, improve observability, and contribute to responsible AI integration in GitLab’s remote, asynchronous environment.

Build and maintain the Payin Platform that handles how money enters Wise. Design Payin Session and Payment abstractions, ensure reliability and scalability for high-volume transactions, collaborate across teams, write testable code, drive end-to-end ownership, and improve APIs and systems for excellent customer experience.

Lead and build scalable backend services for European accounts using Java/Kotlin and Spring Boot. Design account-level features, work with product and analytics, drive architecture, mentor engineers, and deliver data-driven solutions for local payment methods and account products.

Build and maintain backend AI capabilities for GitLab Duo Chat: design flow components and agentic flows in Python/LangGraph, integrate LLMs and multi-agent orchestration, implement and maintain APIs in the Rails monolith, improve observability and reliability, and participate in on-call rotations and cross-functional collaboration to deliver safe, scalable AI chat features.

Build tooling, workflows, and guidance to make GitLab easier to deploy, validate, and operate across cloud-native and self-managed environments. Evolve deployment guidance, improve production-like ephemeral environments, and maintain consistent deployment artifacts and environment contracts across development through production.