Top Backend Developer Jobs in London

Design, develop, and maintain high-volume backend payment services using Java, Kotlin, Spring Boot, AWS, PostgreSQL, and Kafka. Build REST APIs, payment orchestration systems, automated tests, and event-driven architectures supporting card pay-ins and recurring payments. Optimize performance, scalability, and reliability; participate in code reviews and on-call rotations; and ensure secure handling of financial data and regulatory compliance while collaborating cross-functionally.

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, 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 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.

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.

Design and build scalable pricing services for Wise’s Personal & Business Pricing Team. Responsibilities include making architectural decisions, conducting code reviews, improving reliability and observability, owning technical roadmaps, resolving incidents, partnering with product and compliance teams, and mentoring engineers. The role contributes to pricing infrastructure that supports global product launches, promotions, and experiments.

Build and own backend systems powering customer-facing account insights and spending features. Lead projects from technical design through production, ensure reliability, availability, and security, and contribute to incident response. Develop scalable, well-tested services using Java and Spring Boot, with distributed systems and event-streaming technologies. Mentor engineers, review code, improve documentation, and help shape the team roadmap and engineering practices.

Build secure, reliable, and performant backend features for GitLab repository management using Ruby and GraphQL. Develop APIs, data models, business logic, tests, and policy-based functionality while improving performance, observability, caching, and resiliency. Collaborate asynchronously across product and engineering teams, participate in Tier 2 on-call, troubleshoot incidents, review AI-generated code, and contribute to branch protection, Codeowners, merge strategies, and AI-powered repository configuration.

Build scalable backend infrastructure and distributed systems for Palantir’s data platforms. Responsibilities include developing search and indexing systems, data processing libraries, container orchestration, APIs, observability, storage, authentication, asset serving, and automated deployment of technologies such as Cassandra, Elasticsearch, Kafka, and Kubernetes. Collaborate with technical and non-technical stakeholders while delivering reliable, secure, high-performance software.

Lead the technical direction and architecture of the Foundations platform team, owning authentication, authorization, SSO, secrets management, tenancy, and core platform services. Design APIs, drive services through launch, make technical decisions, establish engineering standards, and mentor engineers without formal management authority. Partner with engineering and product leaders to align execution with priorities.

Senior backend engineer responsible for designing, coding, and operating highly available distributed identity systems for Affirm’s international markets. The role includes owning quarterly goals, delivering scalable features in Kotlin and Python, collaborating across product and engineering teams, improving code and design standards, monitoring system availability, resolving production issues, mentoring engineers, and supporting technical planning and hiring.

Own the Core Backend product for an EV charging platform. Responsibilities include executing product strategy, gathering customer and market insights, prioritizing the backlog, writing requirements, prototyping with agentic AI, defining metrics, querying logs, and partnering with design and engineering to deliver reliable integrations and backend improvements.

Build and operate backend data infrastructure for satellite laser ranging measurements, including ingestion pipelines, high-volume time-series storage, customer APIs, and secure data delivery. The role requires production backend engineering, cloud infrastructure, containers, observability, testing, and collaboration with front-end, geodesy, and orbit determination teams.

Build and operate production backend services for payments, core banking, and rewards. Design distributed microservices, event-driven features, APIs, and data flows using Scala, Kafka, and cloud infrastructure. Own services through deployment, monitoring, troubleshooting, and continuous improvement. Collaborate with product, design, and engineering teams while contributing to architecture, testing, reliability, observability, security, and occasional frontend or infrastructure work.

Lead a full-stack engineering team while specializing in backend development. Responsibilities include writing code, mentoring and managing engineers, guiding architecture and technical strategy, coordinating project delivery, collaborating with product and design, overseeing code quality, and evaluating technologies. The role requires strong Go or comparable backend experience, system architecture skills, API integration experience, and technical leadership in a fast-paced environment.

Provides technical leadership for backend engineering teams building scalable workload security products. Designs and architects distributed services that process telemetry, render policies, implement low-latency APIs, and operate reliably in complex environments. Focus areas include scalability, performance, reliability, robustness, security, event processing, systems programming, databases, Kubernetes, and cloud APIs.

Build and operate production backend microservices, APIs, databases, and high-throughput data pipelines using Go and Python. Improve system scalability, latency, reliability, observability, and cost while contributing to deployment tooling, cloud infrastructure, and database performance. Collaborate with analysts, product managers, AI engineers, and frontend teams to deliver end-to-end features. The role requires production software engineering experience and eligibility for UK security clearance.

Build and operate production backend microservices and data pipelines using Go and Python. Design APIs, databases, indexing strategies, and distributed systems; improve scalability, latency, reliability, and observability; and contribute to cloud infrastructure, deployment tooling, and CI/CD. Collaborate with analysts, product managers, AI, and frontend teams to deliver secure, high-impact features for government, defense, and other complex environments.

Build and own backend acquisition technology for iwoca’s German market. Responsibilities include designing Python backend systems, relational databases, data pipelines, REST APIs, HubSpot tooling, third-party integrations, lead-value and attribution systems, and production machine-learning features. The role involves shaping technical strategy, optimizing acquisition funnels, collaborating with marketing, sales, product, and data science teams, and owning projects from discovery through delivery.

Build, maintain, scale, and improve Depop’s search and recommendation systems serving over one million daily users. Collaborate with product managers, data scientists, mobile, web, and backend engineers to design solutions, write high-quality code, manage workflows and data throughout their lifecycle, and document features. The role includes working with distributed systems, retrieval technologies, databases, message queues, ML-driven systems, testing, DevOps practices, and continuous improvement processes.

Design and build scalable backend features using Java and Spring Boot. Collaborate with cross-functional teams, lead complex projects, make technical decisions, balance feature development with technical debt, optimize performance and testing pipelines, and mentor junior engineers while delivering reliable solutions for millions of users.

Build and maintain Rust backend services, APIs, ledgers, and integrations supporting clearing and treasury products. Design reliable financial systems with strong domain logic, observability, testing, and reconciliation. Own services from design through production support, participate in on-call and incident response, collaborate with Product and Security/GRC, and improve reliability, throughput, and technical standards.

Build and scale backend services supporting a global EV charging platform. Responsibilities include developing robust and fault-tolerant software, applying observability and defensive programming practices, analyzing data, integrating charge point operators, and collaborating with product and engineering stakeholders to design scalable technical solutions.

Build and operate backend services, APIs, data catalogs, lineage systems, and publishing platforms for Spotify’s data ecosystem. Develop batch and streaming pipelines, manage metadata and schemas, ensure data quality and reliability, and own projects from technical design through production rollout. Participate in on-call support, observability, automation, and cross-team collaboration.

Develop backend services and APIs powering AI and generative AI tools, while improving search performance, scalability, and reliability. Design data flows, integrate ML services, work with Elasticsearch and PostgreSQL, and contribute to architecture, access control, and visualization infrastructure. Lead code reviews, mentor engineers, refactor systems, document solutions, and own projects through delivery while collaborating with product, design, data science, and business teams.