I build the parts
other teams build on.

Meridian

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used by 40+ newsrooms

A map style editor that runs entirely in the browser. Load a vector tile source, push colour and label rules around, and export a style JSON any MapLibre map can read. There is no account and no server: the tiles are range-requested straight from a PMTiles archive, so a newsroom can point it at their own bucket and never send a request to me.

• MapLibre GL
• PMTiles
• TypeScript
• Svelte
• WebGL
• Web Workers

Tideline

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12K readers a month

Tide and current charts for the Dutch coast, as a PWA that works with no signal, because the places you need it are the places without one. Two years of predictions ship in the install, so the first load is the last network request it needs to make.

• Astro
• Service Worker
• IndexedDB
• Canvas
• TypeScript

Cadence

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open source

A design token pipeline that reads a Figma file and writes CSS custom properties, Swift and Kotlin, with a diff that tells you which components a token change will actually move. Built at Halden, extracted once it stopped being specific to us.

• Node.js
• Figma API
• Style Dictionary
• TypeScript
• CSS

Halftone

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open source

Ordered dithering in the browser, compiled to WebAssembly: eight classical matrices and a colour quantiser, fast enough to run on a video frame. Written mostly to understand Bayer thresholds properly, then kept because other people wanted it.

• Rust
• WebAssembly
• Canvas
• Web Workers
• TypeScript

Nocturne

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open source

A palette generator for dark interfaces that refuses to emit a pair that fails WCAG. Works in OKLCH so lightness means what you think it means, and reports the contrast it achieved rather than the contrast you hoped for.

• TypeScript
• OKLCH
• Accessibility
• CSS
• Vitest