Staff AI Engineer Fast-growing software company San Francisco, California $225k to $350k USD base a year

# Staff AI EngineerFast-growing software company* LocationSan Francisco, California* TypeFull-time* Posted6 October 2026Apply for this roleTalk to us firstYou apply on Workable, where Raydar manages applications.The role, as published## About the companyOur client is a fast-growing software company.## The roleRaydar is recruiting for this role on behalf of our client. Design and ship software systems layered on top of existing large language models, with emphasis on quality measurement and dependable production behavior of autonomous AI features. This is a hands-on staff-level position with broad ownership over both technical approach and product direction. It does not involve training models from scratch.## What you'll do* **Create end-to-end evaluation frameworks** that track and raise the quality of AI agents.* Prototype newer agentic approaches, including multi-agent designs and learning from feedback.* **Develop supporting services** and coordination components that keep agents stable once deployed.* Follow current research on language models and agents, and turn promising ideas into practical experiments.* Take ownership of major parts of the product early on and help set how the team builds agent systems.## What we're looking for* Staff-level experience in an early-stage, 0 to 1 B2B SaaS startup environment; startup experience is essential.* Hands-on experience working with **AI agents**.* Experience experimenting with agentic techniques such as multi-agent systems.* Strong proficiency in Python.* Extensive experience building in ML and AI, with practical skill in prompting language models.* An undergraduate degree in computer science from a highly ranked school.* Clear communication, both written and in person.* Drive, grit and a strong sense of ownership.## Bonus points* Master's or PhD in AI, ML or language models.* Previous experience as a founder or early engineer.## Benefits* Health, dental and vision coverage## Location and work model* San Francisco, California, United States* On-site, 5 days per week in office* Full-time## Compensation, as the posting describes it* Equity* Retirement plan* Flexible time offPay$225k to $350kUSD base a year #J-18808-Ljbffr