Systems Software Engineer (C/C++/Rust) – High-Performance Runtime

anthropic; New York, San Francisco (NY, CA); Hybrid; USD 320,000 - 485,000; Full time

Job summary

Anthropic is seeking a Software Engineer for Systems in New York. The ideal candidate will have extensive experience in C, C++, or Rust, with a focus on systems programming and performance optimization. Responsibilities include designing core systems, optimizing performance, and collaborating with researchers and engineers. The position offers a competitive salary range of $320,000 to $485,000 USD annually, along with an opportunity for hybrid work and visa sponsorship.

Qualifications

• 5+ years of work experience required.
• Strong background in C, C++, or Rust.
• Deep systems programming experience: syscalls, memory management.

Responsibilities

• Design and optimize core systems inside Bun and Claude Code.
• Drive down memory usage, latency, and startup time.
• Dig into performance problems across the stack.

Skills

C

C++

Rust

Systems programming

Performance engineering

Education

Bachelor's degree or equivalent

Tools

Linux internals

I/O methods (kqueue, epoll, io_uring)

Job description

Anthropic is seeking a Software Engineer for Systems in New York. The ideal candidate will have extensive experience in C, C++, or Rust, with a focus on systems programming and performance optimization. Responsibilities include designing core systems, optimizing performance, and collaborating with researchers and engineers. The position offers a competitive salary range of $320,000 to $485,000 USD annually, along with an opportunity for hybrid work and visa sponsorship.