Markus Pettersson
Gothenburg, Västra Götaland County, Sweden
Summary
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RockstarMarkus Pettersson is a Rust developer based in Gothenburg with eight years of experience building reliable systems and apps, currently contributing to Mullvad VPN and running his own independent app studio. He holds an MEng in Computer Science from Chalmers and combines systems-level Rust work with product-minded app design and delivery. Markus is an active open-source contributor—his compiler-focused work on the Gleam language improved string handling and type-checking ergonomics, including a substantial refactor replacing smol_str with ecow. Comfortable switching between consultancy, product, and infrastructure roles, he brings a pragmatic blend of safety-focused engineering and user-facing polish. A hint of his personality shows in a playful GitHub bio that signals a developer who notices the small, telling details.
8 years of coding experience
Github Skills (9)
compiler10
programming-language10
compiler-compiler10
gleam10
type-check9
type-checking9
erlang8
strongly-typed7
static-typing7
Programming languages (18)
Github contributions (5)
gleam-lang/gleam
Jan 2023 - Oct 2024
⭐️ A friendly language for building type-safe, scalable systems!
Role in this project:
Back-end Developer
Back-end DeveloperContributions:4 reviews, 6 PRs, 16 comments in 1 year 9 months
Contributions summary:Markus focused on refactoring and improving code related to the Gleam compiler, specifically dealing with string handling and type checking. Their contributions included replacing `smol_str` with `ecow` for string representation, which involved widespread code changes. They also fixed error messages related to pipe type mismatches, enhancing the debugging experience for developers using the language.
typesafegleamprogramming-languagecompilererlang
MarkusPettersson98/MarkusPettersson98.github.io
Feb 2022 - Dec 2022
Contributions:87 commits, 67 pushes, 2 branches in 10 months
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