He wanted to make toys. An investor had other ideas. The Redis co-founder’s career became a series of unexpected turns, each requiring him to reconsider what business he was really in.

At DoubleClick, Dwight Merriman learned what happens when software meets the scale of the internet. MongoDB grew from those frustrations - and from a decision to save one piece of a much larger idea.

Xiaodan Zhuang, who also goes by Dennis, is the co-founder and CEO of Greptime, a company building GreptimeDB, an open-source observability database written in Rust that unifies metrics, logs, and traces. Before starting Greptime in 2022, he spent roughly 18 years in software infrastructure, including leading the intelligent monitoring team at Ant Group where he built ultra-large-scale time-series platforms for AIOps, plus earlier stints at Taobao/Alibaba and LeanCloud. He is a long-time open-source contributor (GitHub handle killme2008) behind projects like Aviator and xmemcached, and a self-described car enthusiast who races on tracks.