Member of Technical Staff - Research, Post-Training

The Role

We're building a platform that covers the whole life of an LLM: training it, deploying it, and observing it in production. We already run multi-node training, elastic inference, sandboxes, and distributed volumes, and we control the infrastructure underneath. We’re looking for research depth in post-training to sit alongside our systems and product work.

What You'll Do

We are looking for research scientists with a strong track record in reinforcement learning, machine learning, and foundation models, including large language and multimodal models, to join our research team. This role is well suited to candidates interested in improving existing methods and developing new techniques for large-scale model training, optimization, and inference, extending models to long-context and long-horizon tasks, and improving inference-time efficiency, reliability, and robustness in high-stakes real-world deployments.

Preferred Qualifications

• A PhD in computer science, machine learning, or a related field. Candidates with a master’s degree and significant research or industry experience will also be considered.
• A demonstrated record of research accomplishments in reinforcement learning, machine learning, foundation models, or related fields.
• Experience with large-scale training and inference infrastructure, including distributed systems and multi-node GPU clusters.
• Experience developing, training, optimizing, or deploying state-of-the-art large-scale models.
• First-author publications at leading venues such as NeurIPS, ICML, ICLR, CoRL, CVPR, UAI, JMLR, or TMLR.
• A mission-driven mindset and a strong desire to translate research advances into meaningful product impact.
• A collaborative spirit and the ability to work effectively across research and engineering teams.