👋 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• Game originally made for the Spring 2025 React Jam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:

https://particlesystem.com/

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»