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Salary
$150k – $250k per year
Location
In office (San Francisco)
Seniority
Middle · 3+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 14, 2026. First seen by Alion on Oct 14, 2026.

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We train expert models for long horizon tasks.. TrainLoop is a post-training research and product lab. We work with leading pharma, biotech, logistics, and banking enterprises to train specialized models for your most important tasks.
Backed by Y Combinator

TrainLoop builds tools that let experts turn their knowledge and judgment into specialized models. Designing those tools means working in a new category, where many of the basic interactions are still open questions.

This is an unusually esoteric design role. What should an end user feel when the model they work with is learning over time? How should they understand what it has learned, where it is improving, and when to trust it? How can we build systems that uncover what insights live in an expert’s head by observing the decisions, corrections, and distinctions they make in their everyday work?

You’ll shape how people teach models, recognize their own judgment in the results, and guide their improvement over time. There is room here to define the interaction patterns of the category, from the first sketch through the details of the shipped interface.

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