Senior Annotation Specialist - Segmentation & Labeling

About the role

You produce the gold-standard segmentation and labels that everything downstream depends on. Working frame by frame, you segment it and write a precise, per-hand command for each task - to a 99%+ accuracy bar. You also help author the SOP, calibrate new annotators, and verify others' work as a ground-truth specialist reviewer.

What you'll do

• Segment egocentric videos into frame-accurate action boundaries
• Write action labels using a controlled guidance driven vocabulary
• Hold a 99%+ accuracy bar
• Act as a ground-truth reviewer: audit and correct other annotators' segments and labels
• Sharpen the annotation guidelines and edge-case rules as the specification evolves

What we're looking for - must have

• Hands-on experience with video annotating for robotics, embodied AI - ideally at or for a leading robotics company or project
• A real feel for frame-level precision: you can explain what a 99% (versus 95%) accuracy bar means in practice, and you work to it
• Outstanding written English - your labels are commands a model learns from, so clarity and consistency are non-negotiable
• Meticulous, consistent, and comfortable with focused, repetitive precision work over long sessions
• Experience with professional annotation tooling and frame-by-frame video review
• Experience authoring or following detailed annotation SOPs and rubrics

Nice to have

• Robotics, mechanical/mechatronics engineering, or computer-vision background
• Engineering background from a tier 1 institution or worked at an AI/robotics startup

Why it matters

Your ground truth becomes the benchmark and the model is measured against it. This is the role that sets the standard.