Staff+ Software Engineer, Developer Productivity

• Own the end-to-end experience of how engineers and researchers at Anthropic develop, build, test, and ship code at scale. • Cover source control and language ecosystems underpinning the monorepo, build and CI infrastructure keeping thousands of daily builds running reliably across multiple cloud providers, and developer acceleration tooling that deeply integrates Claude into engineering workflows. • Work on infrastructure that determines how quickly Anthropic can train new models, run safety experiments, and scale Claude to millions of users. • Be based in London with a hybrid policy expecting at least 25% of time in the office.

• Have deep experience with build systems, CI/CD pipelines, and/or developer tooling in a large monorepo environment. • Be strongly proficient in Python, Rust, and/or Go. • Be obsessed with developer productivity and reducing friction in the software development lifecycle. • Have experience with container orchestration and infrastructure at scale. • Communicate excellently and enjoy supporting internal partners to improve their development experience. • Be excited about designing foundational systems and comfortable working independently on ambiguous, high-impact technical challenges.

• Have 15+ years of experience in a Software Engineer role, building and operating large-scale developer infrastructure. • Have 3+ years of experience leading large-scale complex projects or teams as a tech lead. • Have experience with CI orchestration tools (Buildkite, Jenkins, GitHub Actions, or similar) and merge queue management at scale. • Have experience building or operating remote build execution systems (Bazel Remote Execution API, BuildBarn, BuildBuddy, or similar). • Have experience with Nix/NixOS/Docker and managing large image/package sets at scale. • Have experience building CLI tools, developer-facing services, and GitHub API and automation workflows.

• Own the technical strategy and roadmap for your area, translating team-level goals into concrete execution plans. • Define infrastructure architecture, ensuring the hardest problems get solved — whether by you directly or by working through others. • Design and build scalable, reliable distributed infrastructure and shared libraries that support high-volume workloads across all engineering teams. • Own and evolve build environments, package management, and dependency systems to enable fast, reproducible builds. • Define and implement language ecosystem standards, tooling, and frameworks that drive developer productivity across research and production workloads.

• Receive competitive compensation between £325,000 and £390,000 GBP annually. • Get visa sponsorship where possible — Anthropic retains an immigration lawyer to support this. • Take generous parental leave. • Enjoy generous vacation and flexible working hours. • Optional equity donation matching. • Shape how hundreds of engineers and researchers build and ship code at one of the most important AI companies in the world.

Anthropic's mission is to create reliable, interpretable, and steerable AI systems. They want AI to be safe and beneficial for users and society as a whole. The team is a quickly growing group of committed researchers, engineers, policy experts, and business leaders working together to build beneficial AI systems. Anthropic is a public benefit corporation offering competitive compensation and benefits.