Research Engineer

As a Research Engineer at Metis, you’ll work on building the next generation of autonomous post-training systems that leverage our Mantis platform. You’ll operate at the intersection of cutting-edge ML research and scalable engineering, designing, implementing, and deploying algorithms that improve how AI agents learn from feedback, synthetic data, and real-world interactions.

You’ll move seamlessly between papers and production, leading large-scale experiments, creating optimized training pipelines, and helping shape the future of post-training autonomy. You’ll have significant ownership, high compute budgets, and the mandate to push the state of the art in applied reinforcement and preference optimization.

What You'll Do

• • Research and help build an autonomous post-training agent leveraging the Mantis platform

• • Design and execute large-scale experiments on synthetic data generation and algorithmic architecture

• • Develop and refine methods for reinforcement learning, reward modeling, and human feedback integration

• • Collaborate cross-functionally with Core and Platform Engineering to deploy and evaluate models in production settings

• • Publish or contribute to leading-edge research in the post-training domain

• • Use tooling and compute efficiently to iterate on experimental pipelines and accelerate research velocity

Requirements

• • Deep experience in machine learning, preferably reinforcement learning, post-training, or alignment research

• • Demonstrated research contributions; ideally published papers (ICML, NeurIPS) or public implementations

• • Strong proficiency in Python and ML frameworks (PyTorch, JAX, or TensorFlow)

• • Comfort with distributed training, high-throughput data pipelines, and large-scale experiment management

• • Ability to reason independently, formulate hypotheses, and run experiments from idea → insight → product impact

Compensation & Benefits

• Base: $200,000–$1,000,000

• Significant Equity

• Full medical, dental, and vision

• Wellness & L&D stipend

• Equinox membership

• Breakfast, lunch, and dinner provided (Unlimited Doordash)

• $25,000 housing stipend

About Metis

Metis helps enterprises and labs build the most reliable AI agents by leveraging post-training. Our platform enables the creation, improvement, and deployment of the most capable frontier agents designed for rigorous, real-world workflows.

Momentum

• 0 → six-figure monthly revenue in the last six weeks

• Working with several Fortune 500 enterprises & frontier AI labs

• Growing 150%+ MoM

Backed by

Y Combinator, CRV, and executives from OpenAI, Google, Mercor, NVIDIA, and others.