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Hi there 👋

My name is Mateusz 'Serafin' Gajewski and I'm a software engineer, an architect and a team lead from Poland 🇵🇱

Currently, I'm working in Starburst Data which is a main contributor to Trino project.

You can find more details about me on my website

Feel free to reach me if you want to ask me about anything 🙂

Some nerd stats about me

I've got a Github account for 12 years. I've filled 66 issues and opened 768 pull requests so far. I've also made 2919 contributions to 28 different repositories.

Most of the time I'm creating software in these languages:

Kotlin Go Groovy HTML TypeScript JavaScript Handlebars C++ Shell Other


  1. Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (

    Java 4.8k 1.6k

  2. go-bind-plugin generates API for exported plugin symbols (-buildmode=plugin) - go1.8+ only (

    Go 176 10

  3. Chrome DevTools Protocol Proxy - intelligent proxy for debugging purposes

    Go 105 21

  4. Headless Chrome DevTools Protocol Client (RxJava3 + Kotlin)

    Kotlin 68 9

  5. Fast, multi-platform web server with automatic HTTPS

    Go 36.7k 2.9k

  6. High Performance, Kubernetes Native Object Storage

    Go 31.2k 3.6k

1,771 contributions in the last year

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Mon Wed Fri
Activity overview
Contributed to trinodb/trino, wendigo/chrome-reactive-kotlin, trinodb/docker-images and 5 other repositories

Contribution activity

January 2022

Created 7 commits in 2 repositories

Created a pull request in trinodb/trino that received 12 comments

43 contributions in private repositories Jan 3 – Jan 26

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