Marcus Deacon
Software developer, UK
I build tools that take care of the boring work.
Currently building Umbra
- 01 Umbra A desktop browser where every tab is its own sealed browser — its own cookies, its own exit IP, its own consistent device. Open project
- 02 Vestra Your entire net worth in one considered view, priced live and added up honestly — deposits never counted as gains. Open project
- 03 Dial Photograph a watch and see what the cheap end of the market is really asking, with the suspiciously cheap listings thrown out first. Open project
- 04 Tessera A Chrome extension that reads every listing on a StubHub event at once and shows the low, typical and high price for each zone and section. Open project
I'm Marcus: thirty, born and raised in the UK, and a father. By day I build software — browser tooling, data-heavy apps, and small, sharp utilities that quietly save people money.
Off the clock it's LEGO, and Old School RuneScape, which remains the best teacher of long-term incremental progress I know. This site is written by hand: HTML, CSS and plain JavaScript, no frameworks, no build step.
- Based
- United Kingdom
- Now
- Umbra, in beta
- Work
- Browser tooling, data apps
- Stack
- TypeScript, Node, Go, Electron
- Off hours
- LEGO, family