Projects

A shell built on Lua 5.5 that still runs every valid Lua program.

• Adds backtick commands, pipes, globbing and environment variables to the language.
• Interpolates Lua expressions, env vars and subcommands into shell commands.
• Checked against Lua's own test suite to stay fully compatible.

• C
• Lua
• Interpreters
• Shell

A paid web app that tracks fuel prices across Ireland on an interactive map.

• Anyone can update prices by taking a photo of a station price board.
• Prices are read from the photo with OCR and ChatGPT.
• Users who contribute get a credit off their next bill.

• Web app
• OCR
• LLM
• Maps

Cuts power to a room when nobody is in it.

• Detects occupancy with PIR motion sensors and a camera.
• Switches power through relays driven by a Raspberry Pi.

• Raspberry Pi
• Python
• Sensors

Self-hosted services for me, my family and friends.

• Runs Gitea, Nextcloud and game servers in Docker.
• DNSMasq, Cloudflare and Restic backups hold it together.

• Docker
• NixOS
• Cloudflare
• Restic

End-to-end encrypted file sharing with a FastAPI server, a Qt desktop client and a React web client.

• Files are encrypted on the client using X3DH key exchange and XChaCha20.
• Built signed request verification on the server with Ed25519.
• Added sliding-window rate limiting, then fixed it after it let attackers lock out single users.
• Wrote the file download endpoint, database layer and tests.

• Python
• FastAPI
• Cryptography
• C++
• React

A desktop app that automates test workflows on hardware built by the engineering teams.

• Drives scientific equipment such as Keysight multimeters.
• Users define their own workflows in configuration files.

• Python
• DearImGui
• Instrumentation

A two-player chess game written from scratch in Python and Pygame.

• Game logic, piece movement and UI all built by hand.

• Python
• Pygame