# Research Engineer / Research Scientist, Post-Training
**Company:** [OpenAI](https://hotfix.jobs/companies/openai)
**Location:** San Francisco, CA
**Salary:** $295K-$555K
**Skills:** Machine Learning, Reinforcement Learning, PyTorch, TensorFlow, Model Evaluation, Ml Engineering, Research, Python, Deep Learning, LLMs
**Posted:** 2025-12-01
> Research and develop improvements to pre-trained models for deployment in ChatGPT and API using reinforcement learning and product-driven approaches. Requires strong ML engineering, research experience with novel models, and ability to debug large codebases.
## Job Description
## In this role, you will:
- Own and pursue a research agenda to improve model capability and performance.
- Collaborate closely with the other research and product teams, allowing customers to optimize their own models.
- Build robust evaluations for tracking modeling improvements.
- Design, implement, test, and debug code across our research stack.

## You might thrive in this role if you:
- Have a deep understanding of machine learning and machine learning applications.
- Have a working knowledge of relevant models, and building evaluations for model capability improvement.
- Are comfortable diving into a large ML codebase to debug.
- Thrive in a dynamic and technically complex environment.
**Apply:** https://hotfix.jobs/jobs/research-engineer-research-scientist-post-training-at-openai-84dfac6b-2704-4ec9-ac6c-666459514793
**Canonical:** https://hotfix.jobs/jobs/research-engineer-research-scientist-post-training-at-openai-84dfac6b-2704-4ec9-ac6c-666459514793