Jan Hartmann is a UI/UX Manager and senior software engineer with 11 years of experience building high-performance, real-time front-end systems that visualize big data across RF, GIS and network domains. He combines hands-on expertise in TypeScript/React, streaming architectures (WebSockets, Protocol Buffers) and visualization stacks like LightningChart, MapLibre/Cesium with a track record of shipping secure, air-gapped deployments. As a former front-end team lead and independent consultant, he architects intuitive, thoroughly tested interfaces that turn complex telemetry into actionable intelligence. Jan is also an open-source contributor to cytoscape.js, improving rendering and background image handling for graph visualizations—reflecting a practical focus on usability and performance at scale. Based in Dubai, he pairs a design-minded UX sensibility with deep engineering rigor to deliver measurable impact in demanding, latency-sensitive environments.
11 years of coding experience
17 years of employment as a software developer
Multimedie Integrator, Digital Media, Digital Communication and Media/Multimedia, A+, Multimedie Integrator, Digital Media, Digital Communication and Media/Multimedia, A+ at Media College Aalborg
Graph theory (network) library for visualisation and analysis
Role in this project:
Front-end Developer
Contributions:1 review, 9 commits, 2 PRs in 2 months
Contributions summary:Jan primarily contributed to the front-end aspects of the Cytoscape.js library. Their work involved bug fixes related to element rendering and texture caching, as seen in changes to `ele-texture-cache.js`. The user also updated documentation and implemented a new demo showcasing background image containment features, indicating a focus on improving usability and expanding the library's capabilities. Finally, the user made style and code changes related to background image handling, including adding new features and addressing linting issues.
Contributions:12 releases, 5 PRs, 115 pushes in 9 months
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