Marcus Kruse - Dortmund at waermefuxx

Marcus Kruse

Dortmund at waermefuxx

Dortmund, North Rhine-Westphalia, Germany

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Summary

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Rockstar

Marcus Kruse is a seasoned backend engineer based in Dortmund with a decade of hands-on experience building robust, maintainable systems. He contributes actively to the Elixir ecosystem—improving tooling like mix format checks and adding practical checks and refactors to Credo—that reflect a focus on code quality, correctness, and developer ergonomics. At waermefuxx he applies this expertise to production systems while also improving test automation and edge-case handling in core libraries. Known for curiosity and a playful outlook ("Don't grow up; it's a trap."), he brings pragmatic problem-solving and attention to detail that often reveals subtle bugs before they reach users.

10 years of coding experience

Github Skills (7)

linter10

code-analysis10

static-analysis10

creo10

elixir10

testing10

code-formatting9

Programming languages (5)

JavaScriptGoErlangElixirPython

Github contributions (5)

rrrene/credo

Apr 2020 - Jun 2022

A static code analysis tool for the Elixir language with a focus on code consistency and teaching.

Role in this project:

Backend Developer

Contributions:2 reviews, 31 commits, 9 PRs in 2 years 3 months

Contributions summary:Marcus made several contributions to the `credo` Elixir code analysis tool. Their work included implementing a new check for the use of `apply`, refactoring code, adding and modifying existing checks for code style and readability, and updating the configuration. The user also addressed string trimming within the tag helper and generally enhanced the tool's functionality and code quality.

linterteachingelixirstatic-code-analysiselixir-language

elixir-lang/elixir

Feb 2020 - Nov 2022

Elixir is a dynamic, functional language for building scalable and maintainable applications

Role in this project:

Back-end Developer & Test Automation Engineer

Contributions:7 reviews, 4 commits, 9 PRs in 2 years 9 months

Contributions summary:Marcus contributed to the Elixir language project by addressing code formatting and testing issues. They implemented a diff output feature for `mix format --check-formatted`, enhancing the quality of code formatting. Additionally, the user fixed a wildcard edge case in the `Path` module and handled empty strings in `System.shell`, demonstrating a focus on robustness and correctness. Furthermore, they improved the test suite by showing hints for `mix test --no-color`.

functional-languagescalablefunctional-programmingelixircompiler

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