Hi, I'm William.
AI engineer and startup builder based in Copenhagen. I'm pursuing an MSc in Human-Centered AI at DTU, expecting to graduate June 2027. I like turning machine learning into things real people actually use.
Selected projects
All projectsStemma
A Danish-speaking AI phone assistant that handled inbound business calls using a real-time voice AI pipeline.
- Python
- FastAPI
- LLMs
- ASR
- TTS
- Twilio
PeytzNotes.dk
An AI study assistant that turns five years of university notes into a searchable, connected, personalized knowledge base, with semantic search, cited chat, exam summaries, and auto-generated flashcards.
- Next.js
- FastAPI
- pgvector
- Supabase
- OpenAI
- Docker
EloQuiz.dk
Adaptive math learning platform that uses an Elo-based difficulty system to match each student to the right next question.
- Vue
- Flask
- Firebase
- OpenAI API
Industrial Anomaly Detection with DINOv3
Zero- and few-shot defect detection on the MVTec dataset using frozen DINOv3 features, embedding similarity, and patch-level localization.
- PyTorch
- DINOv3
- MVTec AD
Newest projects
All projectsgpt-50m-pytorch
A from-scratch 50.8M-parameter GPT language model built in PyTorch for learning and consumer-GPU experimentation.
- Python
- PyTorch
- Transformers
- CUDA
Danish University Admissions 2026
An interactive atlas of demand, admissions, cutoffs, and open study places across Denmark in 2026.
- React
- TypeScript
- Data visualization
AgentArena
A transparent benchmark for watching and comparing AI coding agents as they solve the same software-engineering task.
- Next.js
- TypeScript
- FastAPI
- Python
- SSE
Oak
Oak is an iOS personal finance app that transforms spending data into an interactive Money Tree, helping users turn financial reflection into action.
- Swift, SwiftUI, CSV-based transaction processing, Xcode.
Recent writing
All postsDanish University Admissions 2026
An interactive atlas of demand, admissions, cutoffs, and open study places across Denmark's higher education system.
Introducing PeytzGames
I bought PeytzGames.com — a new home for the games I've made, and the ones still coming.
Why we decided to discontinue Stemma
We recently decided to discontinue Stemma, and I wanted to give an explanation why.