Hello, I'm Karl

My personal portfolio site built with Next.js 16, Prisma, and next-intl. Fully bilingual (English & Swedish), deployed on Vercel with a Prisma Postgres database.

A Japanese reading tool for learning vocabulary in context. Import novels, study the words you encounter, and track your progress with spaced repetition. There's also an integrated AI chat where you can look up vocabulary when taking tests.

My Companion Hub is a full-stack platform for creating, sharing, and chatting with highly customizable AI companions. These companions feature persistent states—tracking mood, affection, and trust—alongside semantic memory, allowing for deep, continuous interactions via text, voice, and context-aware image generation.

Real-time tracking system for an Insta360 360° camera. A C++ layer interfaces with the camera via USB using the official Insta360 SDK, streaming raw H.264 video to a Python pipeline that decodes and reprojects dual-fisheye imagery into equirectangular format via FFmpeg. YOLOv8 object detection and DeepSort multi-object tracking run on each frame, with results broadcast over UDP as JSON to a companion Flutter app. The app displays the live MJPEG stream, lets users select a tracked object, and visualises the computed steering angle — designed for autonomous motor control use cases.

Browser-based educational cybersecurity simulation game built as a fake Linux desktop environment. Players learn offensive security concepts — network reconnaissance, SQL injection, password cracking, SSH lateral movement, and social engineering — through 8 story-driven missions, all simulated client-side with no real network traffic. Features a fully functional terminal emulator, 30+ shell commands with pipe support, a virtual filesystem, and 10 interconnected Zustand state stores managing quests, contacts, player progression, and window state.