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Research Engineer, Post-Training

Why HarveyAt Harvey, we’re transforming how legal and professional services operate. By combining frontier agentic AI, an enterprise-grade platform, and deep domain expertise, we’re reshaping how critical knowledge work gets done for decade

Company

Harvey

Location

San Francisco

Status

Open

Posted

2026-06-26T22:34:50.803+00:00

Harvey is hiring a research engineer for post-training, the loop that turns expert feedback and agent traces into models better at legal work. The job covers running training experiments, optimizing agent harnesses — skills, tools, subagents, retrieval — and building graders and reward systems, plus studying agent behavior and turning findings into data and evals. It asks for hands-on SFT, preference optimization, RLHF/RLAIF or reward-modeling experience, strong Python, and comfort self-managing ambiguous research projects. Pay is $231,000–$340,000; the San Francisco role is hybrid and full-time.