Projects - Casimir Rönnlöf

CML

From-scratch C++ neural network project for MNIST, with data loader, matrix library, dense layers, ReLU, softmax cross-entropy, backpropagation and model saving. It reaches over 95% test accuracy and includes a drawing-grid app for classifying hand-drawn digits.

Fast Translate

Fast Translate lets you translate text from any app instantly with a simple shortcut, without switching tabs. It's powered by the local translation model TranslateGemma.

Lichs

Made it possible to play chess against real players in your terminal. Got 120+ stars on GitHub and released the project on PyPI. The creator of Lichess, Thibault Duplessis, did a commit to the project!

QNano

QNano is a lightweight assembly-style language for defining and compiling two-qubit quantum circuits. I learned a lot of Rust doing this project and also wrote a blog post about it.

Agentic Minecraft

Got 2nd place in a hackathon with my brother by introducing agents in Minecraft. We also added voice AI functionality that made it possible to talk to the agents with a latency so low it felt like it happened in real-time. Demo video here.

Quantum-ECC

Portable Stim-to-hardware quantum error correction pipeline for IQM Emerald. Won 1st place in the biggest Quantum Hackathon in Europe. Demo video here. We summarized our findings in a paper.

Gott

I co-founded an innovative platform connecting restaurants with customers in 2025. Developed the complete mobile and web application (Gott.fi) using React, Next.js, Flutter, Firebase, and various backend technologies, handling the entire technical architecture. Learned a ton!