Kieran van der Heijde

Languages — Python, JavaScript, SQL, HTML/CSS

Frameworks & libraries — Flask, FastAPI, HTMX, Node.js, pandas, NumPy, SQLAlchemy (ORM)

Data & infrastructure — PostgreSQL, Docker, Linux, Git, REST APIs, Metabase, Traefik, CI/CD, self-hosted infrastructure

Practice — DRY, self-documenting code, product & UX, per-test feedback loops

• Build and extend internal Python and JavaScript products used across multiple business units, turning complex requirements into simple, robust, self-documenting tools (DRY by default).
• Supervised the team's first engineering intern through a graduation project that earned a rare perfect final grade.

• Hired for spreadsheet automation; after demonstrating Python and broader engineering ability, was trusted with a series of development projects.
• Delivered them successfully within the first year, earning promotion to Python Engineer.

The first competitive scene for Unturned, officially partnered with Smartly Dressed Games, the studio behind the game. Non-profit ranked platform with skill-based matchmaking and the community's largest tournaments: 1,000+ players and 7,700+ matches. Designed, built, and operated solo.

• Built the analytics layer in Metabase over PostgreSQL, writing native SQL for match-fixing detection, player co-occurrence, and account-linkage analysis.

A platform for teaching computer science, built for the classroom. Students write Python or C# on one screen, run it sandboxed in Docker (kept fast with a warm container pool), and get live per-test feedback. An AI assistant lets teachers generate problems and test cases; ships with a VS Code extension. Built and operated solo with Flask & HTMX.