Addison Johnson · Built with AI
A trading engine that runs overnight, an oracle that tells you what you need to hear, and a workspace that connects your thinking — all designed and shipped solo using AI as the engineering partner.
Projects
Three lenses on each project — cinematic, technical, and personal.
Autonomous backtesting & live-paper trading system
Real signal attribution. Risk envelopes. Live paper execution.
I built a full-stack algorithmic trading system from scratch — backtester, risk controls, signal ledger, and a live-paper engine — entirely with AI.
An oracle that tells you exactly what you need to hear
Crack it open. The algorithm knows.
A tiny AI oracle disguised as the world's most relatable object — the fortune cookie. Ask it anything. It answers in exactly one line.
A thinking space that connects your thoughts
Notes that know what they're next to.
scratch.fyi is where rough ideas become structured thinking — a workspace that links your notes, surfaces patterns, and gets out of the way.
How it works
I'm not a quant, a backend engineer, or a product designer by title. What I am is someone who knows how to frame a problem, review code for correctness, and iterate fast — and AI does the rest.
Every project here was conceived, specced, built, tested, and shipped in this model. The ideas are mine. The architecture is a collaboration. The code is reviewed line by line.