Software Engineer, Claude Code

At Anthropic, we believe new AI capabilities are best achieved through secure foundations, not in spite of them. As capabilities grow more advanced, it is critical that progress moves forward safely and for the benefit of all society. It is the reason why security sits at the center of our work, and not as an afterthought. 

We're specifically looking for a Software Engineer to help us build and maintain new agentic coding tools for developers. The ideal candidate will have a passion for developer tools, extensive knowledge of diverse programming environments and languages, and experience with advanced LLM features like tool-use, chaining and orchestration patterns, and prompt engineering. Curiosity about AI research is a must!

Responsibilities:

• Design, build, and maintain scalable features and infrastructure for AI-powered development tools
• Engage directly with developers inside and outside Anthropic to gather insights and improve user experience
• Collaborate with researchers to improve model capabilities through shared tools and evals
• Stay ahead of advancements in AI-assisted coding by experimenting with new tools, evaluating emerging techniques, and tracking enhancements to existing ones
• Contribute across the stack—from front-end UI to back-end infrastructure—to develop new features, fix bugs, and optimize performance
• Dive into possibly unfamiliar areas like Python notebooks, VS Code plug-ins, and containerized environments.

You may be a good fit if you:

• Are excited about AI-assisted coding as a tool to enhance developer productivity and creativity—not replace human ingenuity
• Spend a lot of time refining and customizing your AI workflows
• Have experience building and maintaining dev tools
• Are an expert in React development, including performance optimization, modern patterns (hooks, context, suspense), and component architecture
• Specialize in user experience engineering but are a capable full stack developer
• Have hands-on experience working with large language models and prompt engineering
• Have worked on projects with stringent safety, security and/or compliance requirements
• Care about the societal impacts and ethics of your work
• Have 5+ years of work experience

Strong candidates may also have experience with:

• Building and maintaining CLI tools
• Working in large codebases and quickly jumping in to unfamiliar development environments
• Working with container orchestration and cloud infrastructure
• Scaling TypeScript projects
• Working with alternate JavaScript runtimes like Bun and Deno

Deadline to apply: None. Applications will be reviewed on a rolling basis.