👋 Hi, I'm Haydn
I'm a developer and product manager.
🖥️ Tech Stack
Here are some of my go-to technology choices:
- JavaScript/TypeScript
- React
- Next.js or Vite
- GraphQL
- PostgreSQL
- Jitsu (analytics and ETL)
- Redshift
- DBT
- Redis
- Vercel or Cloudflare
- Inngest
🔨 Side Projects
These are some of my favourite side projects:
🚜 Harvester
https://github.com/haydn/harvester
- Open source.
- Web app to aggregate data scrapped from the web.
🐜 Anthill
https://github.com/colonydb/anthill
- Open source.
- React UI toolkit.
- Context-aware components (e.g.
<Heading>Example</Heading>automatically uses the appropriate heading level).
🕹️ Replicant Bounty Hunter
https://replicant-bounty-hunter.particlesystem.com/
- Game originally made for the Spring 2025 React Jam
- Built with PixiJS React.
🎨 Sketchbook.js
https://github.com/sketchbook-js/sketchbook/
- Open source.
- A cross between traditional design tools (e.g. Sketch or Figma) and component documentation tools (e.g. Storybook).
- Makes it possible to create mock-ups using live components pulled directly from the codebase.
- Aimed at low-fidelity UX work where the primary focus is working out the broad brush strokes.
- Work in progress.
🃏 Elo Estimator
https://github.com/haydn/elo-estimator
- Open source.
- Tool for estimating work on a backlog by ordering issues by relative effort.
- Automatically estimates effort using an Elo rating system.
- Work in progress.
💌 Contact
You can learn more about me on my personal website:
You can message me on BlueSky:
https://bsky.app/profile/particlesystem.com
You can also email me:
name: haydn
domain: particlesystem.com
email: «name»@«domain»