Sepal AI is building frontier training data and RL environments for frontier lab researchers and enterprise customers. You will work with top researchers, domain experts, and a team of senior engineers on open-ended projects. You will design datasets, systems, and workflows from scratch and help push the boundaries of what LLMs can do.

RL Data Design & Creation

• Build high-quality evals, training tasks, and verifiers across multiple domains.
• Build RL environments with MCP tools and computer-use interfaces.
• Build “recipes” and automations that make it easy for domain experts to create evals.
• Pair with LLM researchers to design training strategy and data.

Open-Ended Research