Top Engineering Jobs in London

Design, implement, and operate Cloudflare’s S3-compatible R2 API gateway across Workers and Kubernetes. Own authentication, authorization, routing, rate limiting, error handling, API compatibility, reliability, observability, and production operations. Lead projects from design through deployment, participate in on-call and incident response, improve performance, and collaborate with storage, metadata, networking, and platform teams. Use AI coding tools extensively in daily development.

Build and operate Cloudflare’s globally distributed Edge platform across more than 320 cities. Develop automation and tooling to improve availability, performance, scalability, and operational velocity; monitor and diagnose production systems; troubleshoot Linux, networking, DNS, HTTP, TLS, BGP, and distributed-system issues; and support services in a follow-the-sun environment. The role includes on-call flexibility and collaboration across systems, network, and software engineering teams.

Build and improve features for Cloudflare’s global edge web server, focusing on the rules engine and control plane. Design reliable, safe, highly available distributed systems, improve performance, create new systems, and collaborate with platform and product engineering teams. The role involves applying algorithms, data structures, concurrency controls, and practical computer science to large-scale web infrastructure.

Develop and maintain Cloudflare’s Rust-based Front Line web server, which processes over 150 million HTTP requests per second. Improve edge availability, safety, reliability, security, deployment frequency, automation, observability, and performance. Collaborate across engineering and product teams to design solutions for large-scale distributed systems and drive continuous operational improvement.

Design, implement, and operate Cloudflare’s S3-compatible R2 API gateway at global scale. Responsibilities include authentication, authorization, routing, rate limiting, error handling, distributed systems development, reliability and observability improvements, deployment, monitoring, incident response, and cross-team coordination. The role also involves on-call participation, postmortems, compatibility with the S3 API, and extensive use of AI tools for development and operations.

Lead and grow the Workers KV engineering team, shaping product features, improving performance, and delivering scalable distributed storage systems. Responsibilities include hiring, onboarding, professional development, planning, execution oversight, process improvement, instrumentation, and resolving delivery blockers. The role partners technical strategy with business goals while building reliable, high-performance developer APIs and infrastructure for Cloudflare’s global edge network.

Design, build, and operate globally distributed storage systems; own code from design to release; provision and benchmark storage hardware; model failure domains; build observability, runbooks, and automation; collaborate across teams to ensure reliability, performance, and scalability.

Design and implement foundational layers of next-generation distributed storage and streaming systems. Own code end-to-end, architect consistency models, optimize storage engine performance, design data-centric APIs, and debug complex race conditions, partitions, and infrastructure-level failures. Work across system layers using Rust/C++ and interact with JavaScript/TypeScript as needed.

Build and maintain Cloudflare’s globally distributed Quicksilver key-value store using Go and C. Develop features, improve CPU and memory performance, enhance monitoring and operational tooling, and debug complex, hard-to-reproduce issues across the software stack. Responsibilities include code reviews, testing, deployments, rollbacks, operations, alerting, and on-call support for a system operating across tens of thousands of servers and hundreds of data centers.

Software engineering intern building and delivering projects for Cloudflare’s global network over a 12–14 week term. The role involves collaborating cross-functionally, working with an experienced mentor, developing software at Internet scale, presenting project results, and participating in professional development and company networking activities. Interns may also contribute to Cloudflare’s blog and media programs.