Jonas Nim Røssum

Full Stack developer · based in Copenhagen

Web Apps·Data Viz·ML

Portrait of Jonas

Selected Work & Projects

Git-Truck@Pluck – Contributor-Centric Coordinated Views for Hierarchical Visualization of Git Repository Evolution

Co-Author

Co-authored and published research on contributor-centric visualization of Git repository structures.

Git Truck (v3 + v4)

Thesis Researcher & Maintainer • TypeScript / React

Next-gen Git visualization tool; led the migration to Vite, developed new contributor-focused features, optimized performance, and handled continuous CLI distribution.

Mindster Booster Talk

Speaker

Gave a technical deep-dive on using spring animations in React to power the Git Truck visualization engine.

Internal Advisor Platform (via IT Minds)

Frontend Developer • Vue / TypeScript / .NET

Built uptime dashboards, complex table views, and internal tools for advisors at PensionDanmark as a consultant via IT Minds, giving stakeholders clearer insight into system status and helping teams respond more confidently to operational issues.

Life Cycle Assessment Platform (via IT Minds)

Frontend Developer • React / TypeScript / GraphQL

Developed a LCA platform to track CO2 emissions for COWI and Arkitema as a consultant for IT Minds. Built interactive emission charts and complex data visualizations.

React Meetup Copenhagen

Speaker

Presented on integrating D3 data visualizations with React and animating them efficiently.

IEEE VISSOFT 2022 Presentation

Speaker

Presented Git Truck research at the 10th IEEE Working Conference on Software Visualization.

Git-Truck: Hierarchy-Oriented Visualization of Git Repository Evolution

Co-Author

Co-authored and published research on polymetric visualization of Git repository structures.

Git Truck (v1 — v1.6)

Co-creator & Maintainer • TypeScript / React

Primary maintainer; engineered the core stack and data visualization architecture, mentored contributors, and drove the migration from Remix to React Router.

Pollo Pollo

Software Developer & CI Coordinator • React / ASP.NET

Led a 10-person team contributing to a decentralized charitable platform. Established pull request workflows, CI/CD pipelines, and coding standards.

Bong Maps

Software Developer • Java / JavaFX / GIS

Developed an open-source desktop GIS mapping application in a 5-person team with fast OSM rendering and address parsing. Mentored peers in Git best practices.

DroneAlliancen

Web Developer • HTML / CSS / Design

Developed and designed the website for a drone company alliance.

Trustmint

Web Developer • HTML / CSS / JS / Design

Developed and designed the website and twitter timeline for a digital trust firm.

Dansk Drone Kompagni

Full-stack Developer • TypeScript / React / .NET / GIS

Built B2B web applications for geospatial data visualization including Ortomatic, Video Map, and Inspecto. Engineered advanced map tooling and serverless PDF exports.

HydroJail

Full-stack Developer • PHP / MySQL / JavaScript

Designed and developed a custom CMS featuring user authentication, a live-updating chat wall, voting system, and administrative panel.