Clera
Founding RL Engineer
- Compensation
- $125K–$200K / yr
- From job posting
- Location
- San Francisco, CA, US
- Arrangement
- On-site
- Employment type
- Full-time
- Posted
- 12 October 2026 (3 days ago)
Checked 3 days agoApplications go to the employer, never to RoleSprint
About this role
ABOUT THE ROLE
Join an early-stage AI team as a Founding Reinforcement Learning Engineer, building core systems for training and evaluating AI agents. You will own the process from environment design through model training and evaluation, and help shape the team's technical direction.
WHAT YOU'LL DO
- Design and build reinforcement learning environments, reward functions, and training pipelines.
- Train and fine-tune models using methods such as PPO, GRPO, DPO, RLHF, and RLAIF.
- Build evaluation frameworks to measure model and agent performance.
- Run experiments, analyze results, and guide research priorities.
- Scale training across GPU clusters and maintain reliable pipelines.
- Bring research ideas into production systems and help establish engineering practices.
- Contribute to hiring as the engineering team grows.
WHAT WE'RE LOOKING FOR
- At least 2 years of hands-on experience in reinforcement learning or machine learning engineering.
- Strong Python skills and deep experience with PyTorch or JAX.
- Practical experience training models with policy gradient methods, reward modeling, RLHF, or similar techniques.
- Experience with distributed training, GPU infrastructure, RL environments, reward functions, training pipelines, and model or agent evaluation.
- A track record of turning research ideas into production systems.
- A degree in computer science, mathematics, physics, or a related field; graduate study is a plus.
- Experience with LLM post-training, agent training, simulation frameworks, or RL training libraries is a plus.
COMPENSATION & BENEFITS
Compensation is $125,000 to $200,000 USD annually. Visa sponsorship is available.
LOCATION
This is an on-site role in San Francisco, California, United States.
Work location
- San Francisco, CA, US
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About this listing
Published on Ashby under the board identifier Clera, which is the name the employer’s own job board carries. RoleSprint has not verified the company’s registered or trading name, so it is shown exactly as published rather than tidied up.
RoleSprint is not the employer and not a recruiter. Applications are made on the employer’s own site and never reach us; what RoleSprint does is help you decide whether a role is worth your time and prepare for it if it is.
Published 12 October 2026, last checked 3 days ago. A posting stops being advertised here 90 days after the employer published it, and one the employer takes down is marked closed rather than quietly removed.