# Jason Warner

> Jason Warner is the co-founder and CEO of Poolside, a San Francisco-based frontier AI lab building proprietary foundation models for software development with $626M raised and a $3B+ valuation. Before Poolside, he was CTO of GitHub - where he launched Actions, Packages, Codespaces, and incubated what became GitHub Copilot - and then a Managing Director at Redpoint Ventures. A self-described 'average developer but excellent architect,' Warner is betting that reinforcement learning from code execution will make software the first domain where AI surpasses human-level intelligence.

- **Role:** Co-founder & CEO at Poolside
- **Organizations:** Poolside, Atlassian (Board), Bridgewater Associates (Operating Board)
- **Nationality:** American
- **Education:** BS, Computer Science, Pennsylvania State University, MS, Computer Science, Rensselaer Polytechnic Institute
- **Known for:** Co-founded Poolside, raising $626M total with $3B+ valuation, CTO of GitHub (2017-2021) - oversaw launch of GitHub Actions, Packages, Advanced Security, Connect, Codespaces, Incubated what became GitHub Copilot while CTO at GitHub

## Career timeline

- **Early career** — Engineering and leadership roles at IBM, SBC, The 41st Parameter, and other companies
- **2010s** — VP of Engineering at Heroku (Salesforce)
- **2014-2017** — Led Product Engineering for Ubuntu Desktop and Ubuntu Phone at Canonical
- **2017** — Joined GitHub as CTO; met Eiso Kant around this time
- **2017-2021** — CTO at GitHub - launched Actions, Packages, Advanced Security, Connect, Codespaces; incubated GitHub Copilot
- **2021** — Left GitHub to join Redpoint Ventures as Managing Director (early growth team)
- **2021-2023** — Managing Director at Redpoint Ventures, investing in developer tools, open-source, infrastructure, fintech, and crypto
- **2023-04** — Co-founded Poolside with Eiso Kant; raised $26M seed led by Redpoint Ventures
- **2024-01** — Poolside raised $100M Series A
- **2024-10** — Poolside closed $500M Series B led by Bain Capital Ventures (NVIDIA, Citi Ventures, eBay Ventures participating); valued at $3B
- **2025-09** — Appointed to Atlassian Board of Directors (effective October 1, 2025)
- **2025-10** — Poolside launched Phase 1 of Project Horizon, a 2-gigawatt AI data center campus in Pecos County, Texas
- **2025-10** — Nvidia announced investment of up to $1B in Poolside, projecting valuation of ~$12B

## Achievements

- Co-founded Poolside, raising $626M total with $3B+ valuation
- CTO of GitHub (2017-2021) - oversaw launch of GitHub Actions, Packages, Advanced Security, Connect, Codespaces
- Incubated what became GitHub Copilot while CTO at GitHub
- Managing Director at Redpoint Ventures, backing companies like Alchemy
- Appointed to Atlassian Board of Directors in September 2025
- Member of Bridgewater Associates Operating Board of Directors
- Poolside secured NVIDIA as an investor and announced up to $1B Nvidia investment at $12B projected valuation
- Built Poolside to 10,000+ NVIDIA GPUs for model training
- Closed partnerships with RTX Corporation and U.S. defense industrial base
- Launched Project Horizon - 2-gigawatt AI campus in Texas

## Latest updates

- **2026-05** — Fortune profiled Warner's views on AGI as an 'infinitely patient senior colleague' for younger workers
- **2025-12** — Poolside reached 150+ employees worldwide with offices in San Francisco and Paris
- **2025-10** — Nvidia announced up to $1 billion investment in Poolside, projecting valuation of ~$12 billion
- **2025-10** — Poolside launched Phase 1 of Project Horizon - 2-gigawatt AI data center in Pecos County, Texas
- **2025-09** — Appointed to Atlassian Board of Directors effective October 1, 2025
- **2024-12** — Poolside and AWS announced strategic partnership for generative AI on Amazon Bedrock
- **2024-10** — Poolside closed $500M Series B led by Bain Capital Ventures at $3B valuation

## Links

- Website: https://poolside.ai
- LinkedIn: https://www.linkedin.com/in/jason-warner-8b93332

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Profile page: https://yespress.io/jason-warner
Published by YesPress — https://yespress.io
Last updated: 2026-05-26