Kevin Jahns
Independent Consultant at Yjs Project
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolKevin Jahns is an independent consultant and seasoned software engineer with 12 years of experience specializing in real-time collaboration, CRDTs, and distributed editing systems. Based in Berlin, he has led collaboration efforts at Tag1 and Evernote and now contributes heavily to the Yjs ecosystem—authoring integrations like y-webrtc, y-websocket, and a Rust port of Yjs that emphasize performance, modularity, and robust testing. His work spans full‑stack engineering, from low-level encoding/decoding and quickcheck tests in Rust to ProseMirror editor bindings and WebRTC/websocket connectors for seamless live collaboration. Notably, he helped integrate Yjs into JupyterLab’s shared notebook model, bringing collaborative editing to a major scientific computing platform. Colleagues know him for pragmatic refactors that simplify builds and deployments while preserving data integrity in concurrent environments.
12 years of coding experience
6 years of employment as a software developer
RWTH Aachen University
Stackoverflow
628reputation
44kreached
10answers
0questions
Github Skills (33)
javascript10
jupyter10
testing10
gulp10
typescript10
websocket10
yjs10
decode10
jupyterlab10
crdt10
decoding10
prosemirror10
typescript-types10
encoding10
gulpjs10
Programming languages (16)
Github contributions (5)
yjs/y-websocket
Mar 2019 - Jan 2023
Websocket Connector for Yjs
Role in this project:
Back-end Developer
Back-end DeveloperContributions:59 releases, 13 reviews, 157 commits in 3 years 9 months
Contributions summary:Kevin's primary contribution involved updating the `y-websocket` server code to be compatible with `yjs@v13-79` and subsequent versions. This included changes to the server-side JavaScript code (`bin/server.js`), likely to adapt to API changes or new features in `yjs`. The user also made adjustments to the `src/y-websocket.js` file, suggesting involvement in the client-side or bridging code between the websocket and the yjs library. The updates included adapting code to support the features and versioning changes in the Yjs library.
websocketyjsyjs-provider
yjs/y-webrtc
Feb 2015 - Jan 2023
WebRTC Connector for Yjs
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:25 releases, 4 reviews, 119 commits in 8 years
Contributions summary:Kevin contributed to the `y-webrtc` repository, which involves WebRTC integration for Yjs. Their work included updating the `package.json` file and making modifications to the `WebRTC.js` and `gulpfile.js` files. These changes involved code refactoring and modularization, as well as improvements to the build and deployment process for the project. The user also updated the default server URL.
webrtcyjsyjs-connector
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