Staff Software Engineer (Claude Code)

• 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!
• 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

Benefits

• Comprehensive health, dental, and vision insurance for you and your dependents
• Inclusive fertility benefits via Carrot Fertility
• 22 weeks of paid parental leave
• Flexible paid time off and absence policies
• Mental health support for you and your dependents
• Competitive salary and equity packages
• Optional equity donation matching at a 1:1 ratio, up to 25% of your equity grant
• Retirement plans with competitive matching
• Life and income protection plans
• $500/month flexible wellness and time saver stipend
• Commuter benefits
• Annual education stipend
• Home office stipends
• Relocation support for those moving for Anthropic
• Daily meals and snacks in the office

• Are excited about AI-assisted coding as a tool to enhance developer productivity and creativity—not replace human ingenuity
• Care about the societal impacts and ethics of your work
• 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 6+ years of work experience
• Have experience building and maintaining dev tools
• Have worked on projects with stringent safety, security and/or compliance requirements
• Spend a lot of time refining and customizing your AI workflows
• We encourage you to apply even if you do not believe you meet every single qualification
• Working with container orchestration and cloud infrastructure
• Building and maintaining CLI tools
• Working with alternate JavaScript runtimes like Bun and Deno
• Scaling TypeScript projects
• Working in large codebases and quickly jumping in to unfamiliar development environments