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LinkedIndavid@raydar.xyz

Research Engineer

Fast-growing technology company

  • LocationSan Francisco, California
  • TypeFull-time
  • Posted12 October 2026

The role, as published

About the company

Our client is a fast-growing technology company.

The role

Raydar is recruiting for this role on behalf of our client. Build and run evaluation and reinforcement learning task pipelines for coding-focused AI models, working directly with external customers from the first day. The role grows over roughly six months from hands-on engineering into leading a small team of engineers.

What you'll do

  • Design and build coding evaluations and reinforcement learning tasks, along with the pipeline that produces them.
  • Run evaluations of leading AI models against an internal benchmark and a set of representative tasks.
  • Partner directly with customers, quality-checking deliverables and shipping to specification.
  • Build reinforcement learning tasks hand in hand with customers as the engagement matures.
  • Grow into leading a team of engineers over the first several months.

What we're looking for

  • Solid working knowledge of reinforcement learning, coding-focused RL, evaluations, harnesses, benchmarks and post-training; this is a firm requirement.
  • A blend of research intuition and the engineering skill to build tasks and evaluations.
  • Prior experience at a data company, or concrete self-driven evidence such as a benchmark you built or a post-training side project.
  • High energy, strong drive and a hunger to learn and do as much as possible.
  • High agency, a strong work ethic, integrity and an earnest attitude toward learning.
  • Roughly 1 to 5 years of relevant experience.

Bonus points

  • Research experience at a strong lab or university.
  • Interest in starting a company someday.
  • Relocating to the Bay Area from outside the region and a deep curiosity about AI.

Benefits

  • Health insurance

Location and work model

  • San Francisco, California, United States
  • On-site, in office
  • Full-time

Compensation, as the posting describes it

  • Equity

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