Mathias Fredriksson
Senior Software Engineer at Coder
Finland
Summary
🤩
Rockstar🎓
Top SchoolMathias Fredriksson is a Senior Software Engineer based in Finland with 12 years of experience building reliable back-end systems and contributing to widely used open-source Go and shell tooling. He has a track record of improving performance and correctness—fixing concurrency bugs in HashiCorp’s yamux, enhancing SFTP path handling, and optimizing git-status checks and prompt rendering in the popular sindresorhus/pure ZSH prompt. At companies like Walkbase and Coder he’s focused on pragmatic refactors, cross-platform test coverage, and shipping features that improve maintainability and user-facing behavior. Trained with a master’s in computer science from Åbo Akademi, he blends systems-level rigor with attention to developer experience, evidenced by contributions ranging from XLSX styling to terminal UX improvements.
12 years of coding experience
9 years of employment as a software developer
Datanome, Datanome at Turku Vocational InstituteMaster's degree, Computer Science, Master's degree, Computer Science at Åbo Akademi
Swedish, Finnish, English
Github Skills (34)
asynchronous10
git10
scripting10
mutex10
async10
testing10
spreadsheet10
terminal-emulator10
terminal-application10
prompt10
osdev10
script10
go10
customisation10
customizing10
Programming languages (25)
Github contributions (5)
sindresorhus/pure
Feb 2015 - Jan 2023
Pretty, minimal and fast ZSH prompt
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:15 releases, 24 reviews, 133 commits in 7 years 11 months
Contributions summary:Mathias primarily contributed to improving the ZSH prompt functionality, addressing spacing and display issues. They refactored the asynchronous logic for git status checks and fetch operations, optimizing performance. The user also implemented enhancements such as showing the hostname in the terminal title during SSH sessions and added support for VI-mode indicators. Furthermore, they addressed multiple bugs related to path handling and prompt rendering.
zsh-promptzsh-pluginbashshell-promptshell-theme
pkg/sftp
Oct 2022 - Oct 2022
SFTP support for the go.crypto/ssh package
Role in this project:Back-end Developer
Back-end DeveloperContributions:21 reviews, 12 commits, 2 PRs in 4 days
Contributions summary:Mathias primarily focused on enhancing the `pkg/sftp` package, which provides SFTP support. Their contributions involved adding functionality to the SFTP server, specifically enabling the setting of a working directory for relative path resolution. This work included modifying existing code to incorporate a working directory option and updating tests for thorough coverage across different operating systems. Furthermore, the user refactored and simplified code, enhancing its overall maintainability.
golangsftpsshgocrypto
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