Steffen Kolmer
Technical Lead at ZetaDisplay
Malmo, Sweden
Summary
👤
SeniorSteffen Kolmer is a Technical Lead and C# enthusiast based in Malmö with 11 years of experience building web applications and leading product-focused engineering teams. He blends hands-on .NET Core backend work with modern React front-end development, demonstrated by contributions to high-profile open-source projects like Element (Matrix) and Jitsi Meet where he improved UI components, accessibility, and React-driven effects. His background spans startup leadership and CTO roles as well as open source product development, giving him a rare mix of strategic direction and implementation discipline. Known for pragmatic refactors and shipping user-facing polish (confetti included), he thrives on turning product needs into maintainable, well-designed software.
11 years of coding experience
3 years of employment as a software developer
Stackoverflow
3,426reputation
313kreached
42answers
2questions
redux
top-5%
react-redux
top-5%
visual-studio-code
top-5%
Github Skills (24)
javascript10
video-conferencing10
typescript10
ui-design10
uid10
front-end-development10
typescript-types10
typescripts10
react10
react-redux9
visual-studio-code9
accessibility9
redux9
matrix8
webrtc8
Programming languages (9)
Github contributions (5)
jitsi/jitsi-meet
Nov 2020 - Aug 2022
Jitsi Meet - Secure, Simple and Scalable Video Conferences that you use as a standalone app or embed in your web application.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:14 reviews, 10 commits, 11 PRs in 1 year 9 months
Contributions summary:Steffen primarily focused on updating and implementing UI components within the Jitsi Meet application, leveraging the Atlaskit library. Their contributions included updating AtlasKit components, adding accessibility features, and modifying existing UI elements related to device selection, settings, and the remote video menu. They also addressed issues with URL handling and dial-in features, demonstrating a focus on improving the user experience and interface functionality. Several commits involved refactoring and code improvements in various UI areas.
securescalable-video-conferencesscalablejitsiweb-application
matrix-org/matrix-react-sdk
Oct 2020 - Sep 2021
Matrix SDK for React Javascript
Role in this project:Front-end Developer
Front-end DeveloperContributions:4 reviews, 43 commits, 1 PR in 10 months
Contributions summary:Steffen primarily contributed to the front-end of the project, with changes focused on UI components and styling. They implemented confetti effects, including the creation of a ConfettiOverlay component and integration within the RoomView. The commits demonstrate a move toward React-based UI development, including a switch to the react way of rendering confetti, and include component refactoring and TypeScript integration.
reactmatrix-chatjavascriptsdkmatrix-sdk
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