What are the responsibilities and job description for the ML Engineer, Mid-Level position at Jobright.ai?
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Job Summary:
Fundamental Research Labs is focused on advancing AI research and developing consumer products powered by cutting-edge technology. They are seeking a Machine Learning Engineer to work on post-training for large language models, implementing advanced reinforcement learning techniques and collaborating with researchers to optimize training processes.
Responsibilities:
• Implement and optimize SFT, DPO, GRPO, PPO, and other RL approaches for large-scale models
• Develop reward models and evaluation pipelines for agentic LLM behavior
• Train and refine end-to-end reinforcement learning agents capable of multi-step reasoning and tool use
• Integrate experimental training results into production-facing agent architectures
• Collaborate with researchers to design, run, and analyze large-scale training experiments
• Optimize training efficiency
Qualifications:
Required:
• Strong background in machine learning and reinforcement learning
• Proficiency with PyTorch
• Hands-on experience implementing post-training pipelines for large models
• Strong software engineering fundamentals in Python
Preferred:
• Experience training agentic LLMs with end-to-end reinforcement learning
• Prior research experience
Company:
Building digital human beings that live, love, and grow with us. https://fundamentalresearchlabs.com/ Founded in 2023, the company is headquartered in San Francisco, California, USA, with a team of 2-10 employees. The company is currently Early Stage.
