Senior ML Engineer, Manipulation

Chef Robotics • San Francisco, CA

1d • $200,000 - $300,000 • Onsite

About The Position

Chef Robotics is building autonomous robots that work alongside humans in commercial food preparation environments. Manipulation is one of the hardest open problems in robotics — and food makes it harder. Unlike structured industrial parts, food items are deformable, visually similar, irregularly shaped, and behave differently depending on temperature, moisture, and preparation state. At Chef, we're solving this in production, every day, across a growing menu of meal types and preparation configurations.
As a Senior ML Engineer, Manipulation, you will own the learning systems that enable our robots to reliably pick, place, and handle diverse food classes using multiple end effectors — from suction grippers to multi-finger hands. You will work end-to-end: from defining data collection strategies and training policies, to deploying and debugging those policies on physical robots in real environments.
We are a small, high-ownership team. We work onsite five days a week and move with startup urgency.

Requirements

• MS or PhD in Robotics, Machine Learning, Computer Science, or a closely related field — or equivalent practical experience
• 5+ years of experience developing and deploying ML systems for robotics manipulation, visuomotor control, or robot learning
• Deep expertise in at least two of: imitation learning, reinforcement learning, grasp estimation, or learned motion generation
• Strong PyTorch skills and experience building reliable, production-quality training and evaluation pipelines
• Hands-on experience deploying policies to real robotic hardware — not just simulation results
• Strong software engineering fundamentals in Python; ability to write maintainable, well-tested code across research and production codebases
• Track record of owning projects end-to-end: from problem framing through field deployment and iteration

Nice To Haves

• Experience with Vision-Language-Action (VLA) models, diffusion policies, or transformer-based action representations
• Familiarity with simulation environments (MuJoCo, Isaac Sim, Genesis) and sim-to-real transfer techniques
• Experience with multiple end effector types — suction, parallel jaw, multi-finger, or soft grippers
• Background in food, agriculture, or consumer goods robotics where object variability is high
• Experience with model compression, quantization, or TensorRT for edge deployment
• Contributions to open robotics datasets or publications at CoRL, ICRA, RSS, NeurIPS, or similar venues
• Experience using simulation environments (e.g. Isaac Sim, Gazebo) for synthetic data generation and domain randomization

Responsibilities

• Design and train manipulation policies — behavior cloning, imitation learning, and RL — for dexterous food handling across diverse item classes and end effector types (suction, parallel jaw, multi-finger)
• Implement and evaluate modern policy architectures (diffusion policies, transformer-based action models, action chunking) and adapt them to Chef's specific food manipulation challenges
• Work with the platform team to build data collection pipelines using teleoperation, kinesthetic teaching, and autonomous rollouts; work with the data team on dataset curation, augmentation, and training infrastructure
• Define evaluation metrics and regression benchmarks that accurately predict real-world manipulation performance; build recovery and fallback behaviors that handle dropped items, mis-grasps, and partial occlusions gracefully
• Partner with perception and robotics engineers to validate end-to-end grasp-to-place performance across new food classes, and end effector configurations

Benefits

• medical, dental, and vision insurance
• commuter benefits
• flexible paid time off (PTO)
• catered lunch
• 401(k) matching

What This Job Offers

• Job Type: Full-time
• Career Level: Senior