Top Backend Developer Jobs in London

Design, build, and maintain backend services, APIs, and integrations using Elixir/Phoenix and Postgres. Lead team-scoped projects, propose and implement agentic/automation workflows with verification loops, participate in cross-team initiatives, mentor engineers, perform code reviews, debug production issues, and contribute to platform improvements and CI/CD-driven deployments.

As a Senior Backend Software Engineer at Zipline, you will enhance engineering practices, develop tooling for CI/CD, and integrate AI to improve quality and speed in software delivery.

As a Software Engineer, you'll develop trading APIs and systems, enhance user experiences, and lead initiatives for blockchain support and new products.

As a Senior Backend Engineer, you'll develop features using Python and various AWS services, focusing on AI-driven solutions for the insurance sector.

As a Backend Engineer, you'll develop features for Proton Drive, collaborate with teams, perform code reviews, and implement testing strategies.

As a Lead Backend Engineer, you'll manage and enhance Proton's marketing technology systems, integrating tools and supporting campaigns while ensuring security and privacy standards.

As a Backend Engineer, you'll design and develop backend APIs using PHP/Symfony, lead complex projects, and ensure high-quality service for B2B clients.

The Backend Engineer will develop Proton's services, create scalable solutions, define APIs, and improve user experiences while collaborating with teams.