mitchs.ai
An AI trained on Mitch Sullivan's copywriting method that writes job ads the way he teaches them. Revenue has climbed every month since launch.
Twenty years of software, games and AI, built and shipped.
This is the Voidmode portfolio, the client platforms, games and products I've built since 2006. Some of it you can play right now, some of it quietly runs underneath businesses you've heard of.
Voidmode started in 2006 as a consultancy and turned into the place where I build things properly, enterprise systems moving billions of events a year, AI products with paying customers and games that run in a browser tab with no install. Most of it is live, and a fair bit of it you can open and poke at right now.
Years shipping production software
Events a year through systems we designed
Projects delivered
What the work covers.
- AI systemsAI that does a real job inside a business, like mitchs.ai writing job ads the way its founder teaches them, with evals and a person kept in the loop.
- Product engineeringCommerce, booking and the systems behind them, like the Trap Music Museum's ticketing, waivers, merch and memberships pulled into one place.
- Real-time 3DGames and simulations that run in a browser tab, from an anti-gravity racer with hand-written physics to a solar system you can fly a spacecraft through.
- Systems at scaleEvent systems built to carry billions of messages a year for retailers like ASDA, Tesco and Loblaws, and the cloud setup that keeps them running without anyone watching.
The ones worth opening first.
Trap Music Museum
Ticketing, waivers, merch and memberships in one system, replacing a stack of costly third-party tools.
Velocity GP
A full racing game that runs in the browser with no install. Hand-written physics, procedurally generated tracks, ships that each handle differently, and a soundtrack we wrote ourselves.
- 17
- 390km/h
- 0
Our Solar System
A cinematic solar system with real orbital mechanics, hand-written GLSL planets and a spacecraft you can fly. Ships as a web app, a desktop build and a strategy game.
txn.dev
Payment infrastructure for AI agents. Settles in around 4ms with eight decimal places of precision, through a TypeScript SDK, an MCP server or LangChain.
NexusHQ
Geopolitical and market signals fused across five layers for macro traders, with a war room, an AI analyst and predictions you can actually hold it to.
- 5
- 20+
- 30+
“About 18 months ago I took a big decision to pivot my business and needed an engineer who knew how to build an AI specific to my very tight niche. As a non-techie, I needed someone I could trust. The work he did (and continues to do) is better than I could have dreamt and the revenue has gradually climbed every month since its launch in July 2025.”
Mitch Sullivan
Strictly a portfolio, for now.
I'm not taking on client work right now, so this site is just here to show what's been built. The full portfolio has games you can play, products you can use and the stories behind the bigger systems.