Research Engineer - Midtraining

About Periodic Labs

We are an AI + physical sciences lab building state of the art models to make novel scientific discoveries. We are well funded and growing rapidly. Team members are owners who identify and solve problems without boundaries or bureaucracy. We eagerly learn new tools and new science to push forward our mission.

You will train frontier models to be highly knowledgeable scientific experts that serve as the foundation for reinforcement learning. You will develop methods for synthetic data generation, distillation, and continual learning  will work closely with RL researchers, physicists, and chemists to create evals that guide scientific data curation. You will collaborate with supercompute engineers to scale compute‑efficient LLM training to thousands of GPUs.

You will build high‑performance tools for yourself to investigate how data shapes intelligence.

• Training LLMs on curated mixes of trillions of tokens
• Calculating scaling laws and compute‑optimal hyperparameters
• Generating billions of tokens of high‑quality synthetic data
• Building evals that correlate with downstream task performance