Fullstack Software Engineer

RST Recruitment
📍 San Francisco, California, United States 💼 Full-time 🕒 Posted July 01, 2026

Job Description

FullStack Software Engineer 

We are looking for a Generalist Software Engineer with experience to join our lean, highly technical team at the frontier of AI. We need a smart, capable engineer with strong first-principles thinking to help us solve novel problems that break traditional engineering best practices. You will be instrumental in building our 'world engine,' a complex, interconnected environment that enables AI models to learn and interact with a simulated digital world, directly impacting the next generation of agentic AI.

What will you be doing?

  • Own and build software 'replicas' from the ground up, integrating them into our core 'world engine' to create a vast, interactive environment for AI agents.
  • Develop services that ensure data coherence across the simulated digital world, tackling unique challenges like making a virtual baseball game get canceled during a simulated hurricane.
  • Solve nove...

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Job Details

  • Location San Francisco, California
  • Job Type Full-time
  • Category other-general
  • Posted Date July 01, 2026
  • Application Deadline August 10, 2026