Constantin Ponfick

Software engineer in Hamburg

Hi, I’m Constantin, a software engineer based in Hamburg. This blog is where I document what I learn about software engineering, cloud development, AI-supported development, and the occasional topic beyond code. I write these notes for my future self, and for anyone exploring similar questions.

Recent

When Geometry Algorithms Disagree: Precision Boundaries in Komp-Geom

26 September 2026·7 mins

A sweep-line discrepancy reveals a broader problem: numerical decisions define the topology of geometric algorithms. Here is the precision foundation I want for Komp-Geom.

Graphify vs. grep: Does a knowledge graph help an AI coding agent?

15 September 2026·17 mins

A measured comparison of Graphify and ordinary source search across twelve FastAPI repository questions, including time, tokens, cost, and whether the knowledge graph showed enough value to justify its overhead.

Private Source, Public Website: Deploying a Hugo Blog with GitHub Actions

6 September 2026·8 mins

How I keep a Hugo blog’s source in a private repository while publishing the generated site with GitHub Actions and GitHub Pages.

Debugging a WAF in Front of Scaleway Serverless Containers

5 September 2026·7 mins

How I configured and debugged host-based routing, upstream TLS, and redirects between a public WAF and an IAM-private Scaleway Serverless Container.

Adding Shapes: My Bachelor Thesis on Minkowski Sums

10 February 2026·8 mins

A practical tour of the algorithm behind my 2019 bachelor thesis: extracting the Minkowski sum of two simple polygons from their convolution.