OpenAI is seeking a Research Engineer/Scientist for Model Fusion to join their Post-Training team, which is crucial in preparing and deploying models for ChatGPT and API services. This role combines technical expertise in ML systems with practical deployment experience, focusing on improving model safety, efficiency, and reliability. Working in San Francisco with a hybrid schedule, you'll collaborate across teams on various aspects including core capabilities, multimodal integration, and tools development. The position offers a unique opportunity to shape ChatGPT's future while working with cutting-edge AI technology. The ideal candidate should have strong technical skills in ML fundamentals, large-scale deep learning, and software engineering, along with excellent communication abilities. You'll lead model releases, resolve complex technical issues, and work closely with both technical and non-technical teams. OpenAI offers comprehensive benefits, competitive compensation including equity, and the chance to contribute to their mission of ensuring AI benefits humanity. The role requires expertise in Python, Kubernetes, and large-scale data systems, with experience in reinforcement learning and transformers being particularly valuable.