Marc-stefan Cassola
Geschäftsführer at Toptal
Bogota, Colombia
Summary
🤩
Rockstar🎓
Top SchoolMarc-stefan Cassola is a seasoned software leader and Geschäftsführer based in Bogotá with 15 years of experience building full-stack systems and leading engineering teams. He combines hands-on development at Toptal with entrepreneurship at Synphonyte, blending product-minded architecture with practical delivery. An active open-source contributor, he has patched core rendering and TypeScript issues in the widely used three.js library and improved routers and UI primitives in modern Rust frameworks like Dioxus and Leptos. His work spans WebGL rendering internals, Django back-end fixes for internationalized email workflows, and frontend reactivity/event primitives, showing comfort across languages and stacks. Known for tackling low-level rendering bugs and cross-language integrations, he brings a rare mix of graphical systems expertise and full-stack fluency. Trained at KIT in computer science, he pairs formal CS foundations with a pragmatic, ship-first engineering style.
15 years of coding experience
Diplom, Computer Science, Diplom, Computer Science at Karlsruher Institut für Technologie (KIT)
Stackoverflow
2,038reputation
158kreached
57answers
0questions
django
top-5%
Github Skills (53)
webgl10
javascript10
event-handling10
translation10
python10
routers10
django10
ui-components10
router10
translater10
webpages10
dom-manipulation10
routes10
translate10
3d10
Programming languages (12)
Github contributions (5)
leptos-rs/leptos
Apr 2023 - Mar 2025
Build fast web applications with Rust.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:3 reviews, 20 PRs, 35 comments in 1 year 11 months
Contributions summary:Marc-stefan primarily contributed to the front-end development of the Leptos framework. They implemented new features such as the `scrollend` event and the `watch` helper, enhancing the framework's event handling and reactive capabilities. Additionally, the user added features like optional fallbacks for components like `Show`, `Suspense`, and `Transition`, and a `Portal` component, improving the framework's flexibility and usability. The user also made some improvements to the directive functionality.
web-applicationsrustfine-graineddeclarativeleptos
mrdoob/three.js
Feb 2019 - Jan 2021
JavaScript 3D Library.
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:11 commits, 7 PRs, 39 comments in 1 year 11 months
Contributions summary:Marc-stefan focused on fixing rendering and scoping issues within the WebGL rendering pipeline of the three.js library. They addressed render target restoration problems, multi-sample render target issues, and issues related to shadow maps and the anaglyph effect. Their work also included updates to TypeScript definitions and improvements to example code, demonstrating a focus on maintaining and improving the core rendering functionality.
virtual-realitysvgwebglcanvasjavascript
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