Hi, I’m Guillaume
A seasoned TypeScript developer who likes tools the way a woodworker likes chisels: simple, sharp, typed down to the last joint, and light in the hand.
After hours, I shape the pieces I wish I had found on the shelf: a query builder, a web server, a set of components.
01
A fluent, typesafe PostgreSQL query builder
French for propeller: a q and a b, from “query builder”, stacked on top of each other.
Sketch your schema as plain TypeScript types, then write queries that read like sentences. Autocompletion and result types follow along.
pnpm add helice see the code →02
A Node.js web server framework built on µWebSockets.js
French for soap foam: thousands of bubbles, the requests.
HTTP routing, WebSockets and Server-Sent Events behind a single Context API, with middlewares, Standard Schema validation and generated OpenAPI docs.
pnpm add @moussejs/core see the code →03
Svelte components, styled by families
French for sepal: the leaf that shelters the flower before it blooms.
Components first, CSS second. Pick an opinionated family, tune its few parameters, take your bundle home. No Tailwind.
pnpm add @sepale/components see the code →The marketplace for industrial reuse
“Industrial reuse starts here.”
By day, I’m part of the Bluemarket crew. Companies buy and sell used and surplus industrial equipment there (compressors, conveyors, forklifts, machine tools) instead of sending it to scrap.
Hélice, Mousse and Sépale are free and open source, shaped on evenings and weekends.
If one of them saves you time, you can sponsor me on GitHub: it keeps the tools sharp and the next ones coming.
become a sponsor ♥