Jonathan Leahy
Full-stack developer. Builder of things.
Staff Engineer at Pismo, A Visa Company, building payments infrastructure at scale. Nights and weekends I'm building Gyrum — a self-improving software factory that builds, tests, and deploys products autonomously.
Featured Projects
Gyrum.ai
An autonomous software factory that builds, tests, and deploys products. 93+ projects shipped.
About me
20+ years shipping software — NHS systems, fintech, now an autonomous AI factory. More about my background →
Buzzy
Family chore bounty board where kids earn pocket money. Multi-currency, QR invites.
Cannon Drop
PlayPhysics-based browser game. Aim, fire, destroy targets.
Prism Light
PlayA light-bending puzzle game. Redirect beams through prisms to solve levels.
What I work with
Go, TypeScript, SvelteKit, React, PostgreSQL, Docker, Kubernetes, CI/CD pipelines, AI/Claude