Bas Zalmstra
Senior Software Developer at Open Source Projects
Utrecht, Utrecht, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolBas Zalmstra is a senior software developer and technical leader with 12 years of experience designing and shipping performant systems in Rust and modern C++, from in-house game engines to robotics core infrastructure. He combines hands-on implementation—optimizing package managers like mamba and contributing to the Mun language/runtime—with architectural direction, having introduced company-wide standards for testing, formatting, and cloud deployments. As a former Technical Director and Software Architect he mentors teams, sets roadmaps, and builds developer-friendly tooling that improves iteration speed and code quality. Based in Utrecht, he seeks roles where low-level engineering meets meaningful products (games, tooling, aerospace, travel) and is known for spotting future-proof solutions while delivering fast, pragmatic results.
12 years of coding experience
13 years of employment as a software developer
BSc, BSc at Utrecht UniversityHogeschool voor de Kunsten UtrechtMSc, MSc at University of Utrecht
Dutch, English
Stackoverflow
21reputation
1kreached
1answer
1question
Github Skills (23)
conda-forge10
c-language10
python10
conda10
cicd10
compiler-design10
build-automation10
package-manager10
rust10
cprogramming-language10
code-generation9
githubaction-workflow8
language-design8
yaml8
github-ci8
Programming languages (20)
Github contributions (5)
mun-lang/mun
Sep 2019 - Jan 2023
Source code for the Mun language and runtime.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:166 reviews, 448 commits, 431 PRs in 3 years 3 months
Contributions summary:Bas made several improvements to the Mun language and runtime. Their contributions include disabling runtime tests on platforms other than Windows, renaming the keyword `function` to `fn` in the syntax, and refactoring the syntax to use rowan 0.6. Furthermore, they addressed various clippy warnings, and they generated code for function calls in the IR. They also detected duplicate definition names.
scriptinggamedevrustruntimeembedable
mamba-org/mamba
Dec 2021 - Dec 2021
The Fast Cross-Platform Package Manager
Role in this project:Back-end Developer
Back-end DeveloperContributions:8 reviews, 6 commits, 5 PRs in 14 days
Contributions summary:Bas's contributions primarily focused on optimizing and extending the core functionality of the `mamba` package manager. They implemented performance improvements by adding fast paths for secret hiding and sha256 hash usage. Additionally, the user added features such as logging JSON output when solving dependencies fails and exposing more fields of the PackageInfo class. Finally, the user refactored solver code to use vectors instead of JSON and corrected an issue related to experimental logging.
cppwindowscondapackage-managerlinux
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