Martin Helmut Fieber

I do JavaScript, C++, Python, Node.js, React, Reading, Writing and a bit of game dev in Unity as a hobby.

Also Senior Software Developer @Klarna, part-time project maintainer at Github and sometimes visible at Twitter.

Github Projects


Generate repeatable pseudo random numbers and non-cryptographic hash numbers for usage in Node.js and browser environments.

Visit project page | Documentation


Not another test runner! (natr) But it is, and it is a highly opinionated one that is used for my own projects.

Visit project page | Documentation


The "Strange expression language" is used to train regular expressions in JavaScript. Also a bit of parser design in a hopefully not so boring way. It is a project where a mentor and trainee can work together in a predefined environment.

Visit project page | Documentation