I am Pepijn van Wijk, currently doing a master's in Artificial Intelligence at the University of
Amsterdam.
Besides studying full time, I work as a fullstack software engineer/ AI engineer at a startup called
Kexxu.
At Kexxu, I have a number of tasks. Some notable ones from the last year have been working on the
development of a AI-powered delta robot system, used for pick and place tasks in a factor, as well as
developing several custom AI models used in tasks such as eye tracking, eye tracking analysis and
anomaly detection. When not working on AI, I have been working
on designing the architecture and implementation of a multi modal data lake for the Kexxu cloud
editor, as well as adding features & connecting our cloud to our growing number of AI modules.
Besides machine learning, some of my interests include fitness, chess, travel, history and
geopolitics.
Currently, I am especially interested in learning about different DL frameworks, namely MLX, which is optimized for Apple's sillicon chips, and
tinygrad, a minimal, cross-platform DL framework.
To learn more about these frameworks, I read papers and implementations and try to translate them to the
new framework. Some of these projects can be found below.
Finally, I like to create AI models solving problems I encounter during practicing my hobbies, such as
creating chess models and GeoGuessr models.
Vision model framework - 2026
A modular, configuration-driven PyTorch framework designed to eliminate boilerplate code for training
computer vision models.
Personal chess engine - 2025
Download your chess.com and lichess games & train a transformer to predit your moves from chess games.
Allows for logging to wandb & ELO estimation by running a tournament against trained Stockfish clones.
Alpha-Gomoku & Connect Four puzzle apps - 2025
Writing a AlphaZero like framework to train a Gomoku- and Connect Four agent, used to find puzzles made
into two IOS apps.
GeoClassiffr - 2024/2025
Building a simple convnet to predict the country an image was taken in.
Chess Neural network - 2024/2025
Atransformer network trained to evaluate winning chances for chess positions. Essentially a searchless
chess engine
MLX optimizer collection - 2024
MLX implementation of Amsgrad and ADOPT optimizer. Also an MLX optimizer test suite.
MLX DeepDream - 2024
Google's DeepDream algorithm ported to Apple's mlx framework
Subber - 2024
Transcribe, translate and embed videos from different languages easily using the Apple mlx framework
Videotulen - 2024
A search engine built for thousands of hours of Dutch Municipality video meetings. This project was my
bachelor's thesis project. I got accepted at ECIR 2025 in Lucca, Italy.
Llama facts & Llama conspiracy - 2023/2024
Llama3.1 finetuned on 300.000 twitter facts & on a couple thousand Reddit r/conspiracy posts
PDFgpt - 2023
Chat with any PDF file using vector search, document embeddings and large language models. This project
was made a couple months before large scale releases of similar tools by e.g. OpenAI
GymVis - 2022
First ever app made. A simple webapp showing what muscle groups get activated by a large variety of
exercises