Senior Machine Learning Engineer

OpenAI·San Francisco, CA

Machine LearningSeniorFull-time

$250K-$400KPosted 10 Mar 2026

About the Role

Join OpenAI to build and optimize large-scale machine learning systems powering the next generation of AI models. You will work on training infrastructure, model optimization, and deployment pipelines for our flagship products including ChatGPT and the API platform.

Requirements

5+ years of experience in machine learning engineering
Strong proficiency in Python and PyTorch or JAX
Experience training large-scale distributed models
MS or PhD in Computer Science, Machine Learning, or related field
Experience with GPU/TPU cluster management

Nice to Have

Experience with transformer architectures
Publications in top ML conferences (NeurIPS, ICML, ICLR)
Experience with RLHF or preference learning
Contributions to open-source ML projects

Benefits

Competitive equity package

Comprehensive health, dental, and vision insurance

Unlimited PTO

$5,000 annual learning budget

Free lunch and dinner

401(k) with company match

Skills

PythonPyTorchDistributed TrainingCUDATransformersRLHF

This listing was posted on 2026-03-10 and is almost certainly closed. It is kept for reference — check the employer’s own careers page for current openings.

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