Jonas Nim Røssum

Full-stack software engineer with strong frontend expertise in TypeScript/React. I build polished products end to end, translating complex technical requirements into intuitive, reliable software. I’m a team player and work well in collaborative, high-quality engineering environments. In my spare time, I enjoy tinkering with electronics and building and playing video games.

• Lead developer and maintainer of Git Truck, an open-source developer tool for software visualization and Git repository analysis.
• Maintain the TypeScript/React architecture for contributor analysis, temporal filtering, repository exploration, and data-heavy D3/DuckDB visualization workflows.
• Migrated from Remix v2 and styled-components to React Router v7, Tailwind CSS v4, Bun, Vite tooling, improving data loading, and longevity of the codebase.

• Built React/TypeScript internal tools, uptime dashboards, and operational interfaces for PensionDanmark, improving visibility into system status.
• Delivered frontend and full-stack features across dashboards, advisory tools, and backend integrations in close collaboration with client and cross-functional teams.

• Built full-stack B2B geospatial products with React, TypeScript, Material Design, and .NET/C#, including drone-captured site data, reporting, and inspection workflows.
• Integrated serverless processing for map analysis, data exports, and PDF report generation, turning large spatial datasets into practical tools for professional users.
• Owned features end-to-end across requirements, architecture, frontend, backend, release delivery, and client feedback in a small product-focused team.

• Open-source TypeScript/React tool for visualizing Git repository evolution, contributor activity, and codebase structure.
• Combines Git data processing, DuckDB-backed analysis, and D3 visualizations for interactive exploration of large repositories.

• Built end-to-end voice interaction prototypes connecting STT, dialogue management, TTS, and speech APIs including ElevenLabs.
• Addressed real-time voice interface constraints including latency, turn-taking, interruption handling, and robustness to recognition errors in product-like conversational flows.

• Focused on software visualization and machine learning.

• Focused on software evolution, maintenance, DevOps, and application development.