Marijn Zwemmer
Staff Engineer at Klang Games
Berlin Metropolitan Area Germany
Summary
🤩
Rockstar🎓
Top SchoolMarijn Zwemmer is a Staff Engineer based in the Berlin area with 13 years of hands-on experience building and leading game engineering teams, currently responsible for gameplay at Klang Games. He progressed from Unity developer and intern roles to tech lead on the simulation MMO Seed, shipping complex systems for multiplayer and simulation-driven games. Marijn combines deep Unity expertise—evident from his open-source unity-toolbar-extender work that adds editor UI and workflow improvements—with a track record of refining tooling, fixing tricky positioning bugs, and improving maintainability. His background spans casual and mid-core titles, engines reused across multiple games, and prototype-to-release delivery for mobile and PC. Colleagues know him as a pragmatic engineer who pairs feature ownership with refactors that reduce technical debt. He brings both technical leadership and a developer-first focus on editor and workflow enhancements that speed up production.
13 years of coding experience
9 years of employment as a software developer
Bachelor of Science (B.Sc.), Bachelor of Science (B.Sc.) at Amsterdam University of Applied SciencesGame Technology & Media, Game Technology & Media at Stuttgart Media University
Dutch, English, German
Stackoverflow
91reputation
40kreached
2answers
1question
Github Skills (17)
scripting10
editor10
script10
front-end-development10
dotnet-core10
csharp10
editorjs10
unity3d10
ui-design7
interface-design7
user-interface7
unity-game-engine6
math6
networking6
canvas6
Programming languages (2)
Github contributions (5)
marijnz/unity-toolbar-extender
Aug 2018 - Apr 2022
Extend the Unity Toolbar with your own Editor UI code.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:9 releases, 38 commits, 13 PRs in 3 years 8 months
Contributions summary:Marijn primarily contributed to the Unity project by extending the editor toolbar with custom UI elements. They added a feature to register and position custom windows within the toolbar and implemented scene switching functionality. The user also addressed a positioning bug, improved examples, and refactored to improve the overall structure and maintainability of the toolbar extension.
toolbarhelperunity-editorunityunity3d-editor
marijnz/unity-editor-spotlight
Feb 2018 - Dec 2018
MacOS-like Spotlight file search in Unity.
Contributions:6 commits, 4 PRs, 6 pushes in 10 months
file-searchsearch-in-fileunityspotlightmacos
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