Senior Research Engineer

CHAI is a social AI platform where millions of people create, share, and talk to AI characters. The company is seeking a Senior Research Engineer to own the pipeline that turns raw roleplay data into better model behavior, driving the loop from eval signals to training runs and deciding what to try next.

Responsibilities:

• Own the pipeline that turns raw roleplay data into better model behavior — SFT, RL, reranking, data curation, whatever it takes
• You'll run the loop from eval signal to next training run and decide what to try next