The opportunity
About the Team Training Runtime builds the distributed systems that power OpenAI's largest model training runs - most recently GPT-5. 5!
What they're looking for
- Have built or owned dataset, data loading, storage, or distributed training: infrastructure at large scale (e.g. torch.utils.data )
- Care equally about API design, debugging ergonomics, performance, and bit-level correctness.
- Understand the failure modes of large distributed training jobs and know how: data systems can create or prevent them.
- Have experience with stateful iterators, checkpoint/restart semantics,: caching, remote services, or high-throughput storage reads.
