ClickHouse is an open project, and you can contribute to it in many ways. You can help with ideas, code, or documentation. We appreciate any efforts that help us to make the project better.
Thank you.
We have a developer's guide for writing code for ClickHouse. Besides this guide, you can find Overview of ClickHouse Architecture and instructions on how to build ClickHouse in different environments.
If you want to contribute to documentation, read the Contributing to ClickHouse Documentation guide.