Top Backend Developer Jobs in London

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.

Build scalable backend systems and customer-facing financial products for Wise’s Account Sharing team. Design reliable asynchronous microservices supporting international joint accounts, kid accounts, shared spending, and money movement. Collaborate with product, design, research, and analytics teams to shape solutions in a greenfield environment. Contribute to architecture, product direction, infrastructure reliability, compliance-related systems, and globally scalable consumer finance experiences.

Build backend data frameworks and tooling that keep GitLab’s datastores scalable, healthy, and safe across SaaS and self-managed deployments. Develop retention and lifecycle controls, schema-change guardrails, bulk data removal tools, SQL traffic replay, and background operations frameworks. Collaborate across engineering and product teams, review database changes, improve performance and migration safety, document best practices, and participate in a tier 2 database on-call rotation.

Build and maintain backend solutions for Wise’s recipient and contacts experience. Responsibilities include developing scalable distributed systems, designing RESTful APIs, working with relational and non-relational databases, optimizing queries, designing schemas, writing testable code, conducting code reviews, and collaborating with designers, product managers, and analysts in an autonomous agile team.

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.

Build, test, ship, and operate production backend features using Ruby/Rails, Go, or other modern languages. Design APIs, background jobs, integrations, data models, migrations, and services while ensuring security, performance, reliability, and observability. Review code, investigate failures, reduce technical debt, provide operational support, collaborate asynchronously with product and engineering teams, and use AI coding tools responsibly.

Provides technical leadership across teams by designing and delivering large-scale backend initiatives, modernizing monolithic systems, defining architecture and engineering standards, and improving reliability, security, observability, and operability. The role establishes Go and Kubernetes patterns, guides Rust adoption, participates in incident response, mentors engineers, influences platform roadmaps, and leads safe adoption of AI-assisted and agentic engineering 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.

As a Backend Engineer, you'll build and improve technology for small businesses, focusing on developing reliable code, collaborating on projects, participating in code reviews, and enhancing operational efficiency.

Leads engineering across multiple full-stack web, backend, and mobile squads within Trainline’s Customer Growth pillar. Manages Engineering Managers, develops talent, oversees complex delivery, guides technical strategy and architecture, and connects railcard, subscription, retention, and customer value domains. Partners with Product, Design, Data, and Commercial teams to drive business outcomes. Champions engineering quality, innovation, monitoring, alerting, incident management, operational excellence, and a high-performing, inclusive culture.

Develop and maintain the Xodo Sign eSign platform by implementing features, improving existing functionality, and participating throughout the software development lifecycle. Responsibilities include requirements analysis, technical design, implementation, testing, maintenance, research, code reviews, collaboration, and promoting engineering best practices. The role requires modern PHP, MySQL, REST APIs, Docker, AWS, and experience securing, optimizing, benchmarking, and scaling high-availability applications.

Design, build, and maintain secure, tested, performant backend integrations connecting GitLab agents with tools such as Slack, Claude Code, and Codex. Own complex features, develop GraphQL and REST APIs, improve automated testing, troubleshoot production issues through on-call rotations, enhance observability and resiliency, and collaborate across product, frontend, backend, and AI engineering teams.

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.

The role involves designing and building cloud-native applications using Java and Spring Boot, focusing on scalable microservices for financial institutions while leading agile practices.

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.

Set long-term technical strategy for backend identity systems, lead major distributed-system initiatives, ensure operational availability, establish engineering quality standards, collaborate cross-functionally, and mentor engineers. Build and launch highly available systems supporting international expansion, KYC verification, identity data management, decisioning, regulatory compliance, and global risk models.

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.