# Xiaodan (Dennis) Zhuang

> Xiaodan (Dennis) Zhuang is the founder and CEO of Greptime, building an open-source database for metrics, logs and traces. His career includes Taobao, AVOS, LeanCloud and Ant Group, where he led Intelligent Monitoring work. An open-source developer since 2008, he also writes about distributed systems and AI coding agents and enjoys modifying cars and driving on track.

- **Role:** Founder & CEO at Greptime
- **Organizations:** Greptime, Ant Group, LeanCloud, AVOS Systems, Taobao, 1001m.com
- **Education:** Fuzhou University
- **Known for:** Founded Greptime and launched the open-source GreptimeDB database., Led Intelligent Monitoring work at Ant Group., Long-running open-source work includes AviatorScript, XMemcached and SOFAJRaft.

## Career timeline

- **2007-2009** — Java engineer at 1001m.com.
- **2008** — Began writing open-source software, according to his personal biography.
- **2009-2012** — Senior engineer at Taobao.
- **2012-2014** — Senior engineer at AVOS Systems.
- **2014-2017** — Technical lead at LeanCloud.
- **2017-2022** — Staff engineer, then senior staff engineer at Ant Group; led Intelligent Monitoring work.
- **2022-04** — Founded Greptime with Ning Sun and Jiachun Feng.
- **2022-11** — GreptimeDB became open source; Greptime announced a multimillion-dollar angel round.
- **2026-03** — Introduced TMA1, a local observability tool for coding agents.
- **2026-06** — Published the Openfuse migration retrospective.

## Achievements

- Founded Greptime and launched the open-source GreptimeDB database.
- Led Intelligent Monitoring work at Ant Group.
- Long-running open-source work includes AviatorScript, XMemcached and SOFAJRaft.
- Built TMA1 to record and query coding-agent activity.

## Latest updates

- **2026-09** — Published LLMs Already Understand Observability. What Is Left for the Database?, arguing for a lightweight semantic layer and strong concurrent querying.
- **2026-06** — Published an Openfuse migration retrospective covering AI coding agents, token accounting and GreptimeDB engineering tradeoffs.
- **2026-03** — Introduced TMA1 for local coding-agent observability.

## Links

- Website: https://blog.fnil.net/
- LinkedIn: https://www.linkedin.com/in/dennis-zhuang/
- Twitter/X: https://x.com/killme20082
- GitHub: https://github.com/killme2008

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Profile page: https://yespress.io/dennis-zhuang
Published by YesPress — https://yespress.io
Last updated: 2026-10-11