Centaur Labs

Labeling medical images at scale

React Engineer

Boston, MA / Remote
Job Type
3+ years
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About the role

Our labeling customers use our React website to design labeling tasks and explore the labels generated by our crowd. We’re looking for a creative front-end developer to help us deliver a fast, modern web app to delight our customers, including:

  • Intuitive, rich interfaces that communicate just enough information while inviting the user to learn more
  • Streamlined workflows to enable uploading large biomedical datasets from a variety of sources
  • Effective use of techniques like caching, multi-part file uploads, and async updates to ensure a smooth and responsive UX


  • 3+ years experience in full-time roles using React.js
  • Ability to balance quality with speed, refactor as you go, and keep technical debt to a minimum
  • Experience shipping production code at a fast-growing startup


  • Experience using data vizualization frameworks
  • Full-stack experience (or a desire to learn!)
  • Boston-based, but not required; EST and/or CST time zone is strongly preferred

Don’t meet every single requirement? Studies have shown that women and people of color are less likely to apply to jobs unless they meet every single qualification. At Centaur Labs, we are dedicated to building a diverse, inclusive, and authentic workplace — so if you’re excited about this role but your past experience doesn’t align perfectly with every qualification in the job description, we encourage you to apply anyways. You might just be the right candidate for this or other roles!

Why you should join Centaur Labs

At Centaur Labs, we label data at scale to enable breakthroughs in medical AI. Our novel approach uses collective intelligence to aggregate medical opinions from experts and students all over the world. Our labeling customers include leading AI startups and prominent research organizations. We are a small, tight-knit team headquartered in Boston, and we're funded by Y Combinator, Accel, and GFC.

Centaur Labs
Team Size:25
Erik Duhaime
Erik Duhaime
Tom Gellatly
Tom Gellatly
Zach Rausnitz
Zach Rausnitz