Top Backend Developer Jobs in London

Lead design and delivery of a greenfield Trust Accounting backend: own architecture, build secure auditable services, ensure reliability and observability, set quality gates, collaborate cross-functionally, and mentor engineers.

Design, build, and operate high-traffic backend services in PHP and Go. Extract services from a monolith, design APIs (REST/GraphQL) for agentic/LLM clients, improve page speed and end-to-end performance, leverage AI coding tools, and collaborate with Product and Design to deliver reliable integrations and cloud-based systems.

Develop and maintain backend services and APIs, ensure system reliability, and collaborate in a fast-paced team environment.

Design, build, and maintain cloud-native backend services for index data processing. Write production-ready Python, deploy and operate services on AWS, use Infrastructure as Code, and monitor/debug systems with observability tools like Prometheus and Loki. Collaborate with product, research, and engineering teams.

The Backend Software Engineer will develop and maintain backend systems for data processing related to coffee farming, utilizing Python and PostgreSQL. Responsibilities include feature development, problem-solving, and adapting systems to regulatory changes while ensuring system resilience.

The role involves back-end development using .NET Core and SQL, contributing to Jibble 2.0 API integrations, and collaborating with product and design teams.

The Senior Staff Backend Engineer will lead technical direction for systems, manage engineering standards, mentor teams, and ensure alignment with broader company goals. Responsibilities include hands-on coding, architecture, and partnership with product teams to maximize impact.

As a Staff Backend Engineer, you will collaborate across teams to build and improve backend systems using various technologies, focusing on customer-centric solutions and resilient software.

As a Senior Backend Engineer, you will collaborate with cross-functional teams to build resilient software and support various banking operations using technologies like Go and Kubernetes.

The Backend Developer will manage and evolve microservices, implement features, maintain database scripts, debug issues, and ensure service reliability in a cloud-native environment.

Design and develop cloud services using JVM technologies, focusing on high availability and scalability while implementing automated delivery with CI/CD pipelines.

The Senior Backend Engineer will design and build scalable systems, mentor junior engineers, identify process efficiencies, and communicate technical challenges effectively.

Rover seeks a Lead/Senior Software Engineer with 7+ years of experience, specializing in frontend technologies like ReactJs and Python. Responsibilities include building customer-facing products, mentoring team members, and promoting engineering best practices. The role includes collaboration on projects and a commitment to inclusivity and diversity in the workplace.

The Expert Backend Engineer will develop and maintain large-scale components for cloud security, emphasizing clean, efficient code and collaboration with teams.

As a Backend Engineer at Trust Wallet, you'll develop backend features for multiple platforms, maintain infrastructure, ensure system monitoring, and foster team growth.

Lead design and implementation of high-performance agent runtimes, backend services, and self-hosted model/agent infrastructure. Build low-latency execution systems, real-time data pipelines, telemetry loops, CI/CD for zero-downtime deployments, and ensure fleet reliability on AWS/EKS.

The Senior Backend Engineer will enhance back-end development with Python/Django, implement new features, and improve architecture while collaborating with an Agile team.

The role involves diagnosing and resolving production incidents, developing fixes in Java, collaborating with teams, and improving system reliability while managing documentation and monitoring performance.

Lead architecture and implementation of large-scale, distributed backend systems. Design databases, processing systems, APIs, and protocols; drive major migrations and re-architectures. Own reliability, monitoring, and production operations while mentoring engineers and driving cross-team technical alignment.

Lead technical direction across multiple squads; design, build, and scale backend systems (Python/Django), data pipelines, and third-party integrations; drive complex initiatives end-to-end; mentor engineers, run architectural reviews, and improve reliability, observability, and performance; partner with PMs and leadership on roadmaps and trade-offs; participate in on-call rotation.

The Software Engineer (Python) role involves developing and maintaining an AI platform, building scalable APIs, and collaborating with cross-functional teams to enhance AI workflows for financial firms.

Build and operate backend services for a high-volume crypto trading platform, including order management, market data processing, REST APIs and WebSocket streams. Collaborate with product, frontend, and trading teams to ensure low-latency, scalable, and highly available systems.

As a Senior Backend Software Engineer, you will develop and maintain the SaaS platform, focusing on user-centric design and implementation using a variety of technologies. Your role involves collaborating with teams to meet customer needs and enhance the product.

The Backend Engineer III will collaborate with cross-functional teams to design and build parts of Monzo's banking platform using technologies like Go and Kubernetes, focusing on customer outcomes and resilient software.

The Senior Back-End Software Engineer designs, develops, and maintains scalable backend systems while taking ownership of the software development lifecycle.