# Joshua Meier

> Joshua Meier is the co-founder and CEO of Chai Discovery, a San Francisco company developing AI tools for molecular design. A Harvard graduate who worked at OpenAI, Meta FAIR and Absci, he helped pioneer protein language models before founding Chai in 2024.

- **Role:** Co-founder and CEO at Chai Discovery
- **Organizations:** Chai Discovery, Absci, Meta AI / Facebook AI Research, OpenAI
- **Education:** Double major in computer science and chemistry, Harvard University
- **Known for:** Co-authored a 2021 PNAS paper on language modeling of 250 million protein sequences., Co-founded Chai Discovery in 2024., Led Chai as it released Chai-1, Chai-2 and Chai-3 and entered major pharmaceutical collaborations.

## Career timeline

- **Teenage years** — Worked in a high school stem cell lab.
- **2018** — Joined OpenAI research and engineering.
- **2019-2021** — At Facebook AI Research, co-authored work on protein language models trained on 250 million sequences; the paper appeared in PNAS in 2021.
- **Before 2024** — Served as chief AI officer at Absci.
- **2024** — Co-founded Chai Discovery with Jack Dent, Matthew McPartlon and Jacques Boitreaud.
- **2025** — Chai released Chai-2 and reported double-digit de novo antibody hit rates.
- **2026** — Chai announced major pharmaceutical collaborations and a $400 million Series C.

## Achievements

- Co-authored a 2021 PNAS paper on language modeling of 250 million protein sequences.
- Co-founded Chai Discovery in 2024.
- Led Chai as it released Chai-1, Chai-2 and Chai-3 and entered major pharmaceutical collaborations.

## Latest updates

- **2026-08** — Chai announced a collaboration with Bristol Myers Squibb; Meier and Matthew McPartlon appeared on Sequoia’s Training Data podcast.
- **2026-07** — Chai announced a $400 million Series C and collaborations with Novartis and argenx.
- **2026-06** — Chai announced a license agreement with Pfizer involving Chai-3.

## Links

- LinkedIn: https://www.linkedin.com/in/joshua-meier-27a6861a/
- Twitter/X: https://x.com/joshim5

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Profile page: https://yespress.io/joshua-meier
Published by YesPress — https://yespress.io
Last updated: 2026-09-29