# Ion Stoica

> Ion Stoica is a Romanian-American computer scientist, UC Berkeley professor and serial founder whose research groups helped produce foundational systems including Chord, Apache Spark, Apache Mesos, Ray and vLLM. He co-founded Conviva, Databricks, Anyscale and Arena, yet has repeatedly chosen to remain in academia, arguing that students, open-source users and industry feedback form a productive loop for discovering the next important systems problem.

- **Role:** Professor and Director of Sky Computing Lab at UC Berkeley; Executive Chairman of Databricks and Anyscale
- **Organizations:** University of California, Berkeley, Sky Computing Lab, Databricks, Anyscale, Conviva, Arena
- **From:** Bucharest, Romania
- **Nationality:** Romanian-American
- **Education:** M.S., Computer Science and Control Engineering, Polytechnic University of Bucharest, Ph.D., Electrical and Computer Engineering, Carnegie Mellon University
- **Known for:** ACM Doctoral Dissertation Award, 2001, Presidential Early Career Award for Scientists and Engineers, 2002, Alfred P. Sloan Research Fellowship, 2003

## Career timeline

- **1989** — Completed an M.S. in Computer Science and Control Engineering at Polytechnic University of Bucharest and began work at the Institute for Research in Informatics in Bucharest.
- **1994** — Immigrated from Romania to the United States for doctoral study at Carnegie Mellon University.
- **2000** — Completed a Carnegie Mellon Ph.D. on scalable quality of service for the Internet and joined UC Berkeley's faculty.
- **2001** — Received the ACM Doctoral Dissertation Award; co-authored the influential Chord peer-to-peer lookup paper.
- **2006** — Co-founded video intelligence company Conviva with Hui Zhang.
- **2009-2010** — Berkeley's AMPLab developed and open-sourced Apache Spark, with Stoica among the faculty leaders.
- **2013** — Co-founded Databricks with Ali Ghodsi, Matei Zaharia, Patrick Wendell, Reynold Xin, Andy Konwinski and Arsalan Tavakoli-Shiraji; became its first CEO.
- **2016** — Moved from Databricks CEO to executive chairman, with Ali Ghodsi becoming CEO.
- **2019** — Received the ACM SIGOPS Mark Weiser Award and co-founded Anyscale around the Ray distributed computing framework.
- **2021** — Co-authored the proposal for sky computing, envisioning greater interoperability across cloud providers.
- **2025** — Co-founded Arena, formerly LMArena, an independent platform for community-powered evaluation of AI models.
- **2025-2026** — Helped develop AI-Driven Research for Systems, using generative models and reliable evaluators to search for improved systems algorithms.

## Achievements

- ACM Doctoral Dissertation Award, 2001
- Presidential Early Career Award for Scientists and Engineers, 2002
- Alfred P. Sloan Research Fellowship, 2003
- CoNEXT Rising Star Award, 2007
- ACM Fellow, elected 2012
- ACM SIGOPS Hall of Fame Award, 2015
- ACM SIGOPS Mark Weiser Award, 2019
- Honorary member of the Romanian Academy
- Co-founder of Conviva, Databricks, Anyscale and Arena
- Faculty leader and contributor associated with Chord, Apache Mesos, Apache Spark, Ray, SkyPilot, vLLM and Chatbot Arena

## Latest updates

- **2026-09** — Published a wide-ranging Arena interview about his path from Romania to Berkeley, the creation of Spark and Databricks, and his current work on reliable AI systems.
- **2026-09** — Published 'Two Key Gaps in Agentic Software Engineering,' arguing that coding agents still need stronger performance evaluation and broader systems context.
- **2026-04** — Co-authored 'AI-Driven Research for Databases,' extending AI-guided search and evaluator design to buffer management, query rewriting and index selection.
- **2026-02** — Presented AI-Driven Research for Systems at ScaledML 2026.
- **2026-01** — UC Berkeley listed BlendServe, research on resource-aware batching for offline inference, among his selected 2026 publications.

## Links

- Website: https://people.eecs.berkeley.edu/~istoica/
- LinkedIn: https://www.linkedin.com/in/ionstoica
- Twitter/X: https://x.com/istoica05
- GitHub: https://github.com/istoica

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Profile page: https://yespress.io/ion-stoica
Published by YesPress — https://yespress.io
Last updated: 2026-09-26