Penweir
A self-hosted AI gateway. Companies connect their systems to language models and decide for themselves which data goes along.
Software · early accessRead more: Penweir
OstraPortfolio
Portfolio
The companies and projects under Ostra. Each company is its own flag on its own mast.
Companies
The orange pennant marks where most of the attention goes right now.
Nero Vintage Watches
Vintage and pre-owned watches, checked and documented. Buy, rent, or have them sourced.
Trade · website under constructionRead more: Nero Vintage Watches
How long has each flag been up?
The length of the pennant is the time since the start.
2021202220232024202520262027now
- Nero Vintage Watches · Aug 2021
- Penweir · Oct 2026
Also built
Projects next to the companies.
RGPT-LLM
Feb 2026 – Jul 2026
A language model built from scratch, with an expected size of about 300M parameters (comparable to GPT-2). Applied machine learning and LLMOps. Source code on GitHub.
Omroep ZOUT mobile app (iOS & Android)
Aug 2026 – Nov 2026
Mobile app for Omroep ZOUT, a regional broadcaster in the Utrecht region, designed and built with a fellow engineer. Android version from development to publication.
OLVA & St. Joseph website
Jan 2026 – present
Software engineer and webmaster for the website of the St. Josephkerk in Hooglanderveen: web development and technical support.
Flash
May 2018 – Apr 2019
Service-oriented app that gave users personalised information from databases through API integrations, built to be easy to use and efficient. More than 20,000 active users.
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