Research Engineer, Infrastructure, Tinker

Thinking Machines Lab's mission is to empower humanity through advancing collaborative general intelligence. We're building a future where everyone has access to the knowledge and tools to make AI work for their unique needs and goals. We are scientists, engineers, and builders who’ve created some of the most widely used AI products, including ChatGPT and Character.ai, open-weights models like Mistral, as well as popular open source projects like PyTorch, OpenAI Gym, Fairseq, and Segment Anything. About the Role We’re looking for an infrastructure research engineer to design, scale, and harden the systems behind Tinker so our internal teams and external customers can fine-tune models smoothly, reliably, and cost-effectively. You’ll sit at the intersection of large-scale training systems and product infrastructure: b