Nie Dianhui used to be a serial entrepreneur, and currently leads a R&D team in the gaming company. He is very passionate about the open source community, and came across TiKV in 2018 when he was learning Rust language. After he raised the first PR in the Coprocessor subproject of TiKV, he has gradually deepened his understanding of the project, and grew into a TiKV Committer in 2019.
The TiKV project is a good place to start, with the issue descriptions and labels very clearly provided. My overall impression of the TiDB community is – very professional, and very human.