# Derek Castelli — heyderekj.com

> Personal site of Derek Castelli: agentic design engineer, still making websites full-time, writing on faith and technology, and shipping thoughtful side projects.

## About

Derek is a Christian designer-engineer with roots in Apple Retail, church creative work, and freelance practice since 2020. The site hosts long-form posts (often on AI, tools, faith, and building), a projects directory, an about / background page, and a tools / uses list.

## Primary pages

- [Home](https://heyderekj.com/): intro, recent posts, featured projects
- [Posts](https://heyderekj.com/posts/): full archive of writing
- [Projects](https://heyderekj.com/projects/): apps and sites (e.g. Harvous, Dinky, Here’s My Church)
- [About](https://heyderekj.com/about/): background, story, experience timeline, and social links
- [Tools](https://heyderekj.com/tools/): software and hardware Derek reaches for

## Feeds & machine-readable

- [RSS](https://heyderekj.com/rss.xml): all posts
- [Sitemap](https://heyderekj.com/sitemap.xml): URLs for indexing

## Contact & profiles

- Email: derekj@hey.com (mailto link on site footer)
- GitHub: https://github.com/heyderekj
- X (Twitter): @heyderekj

## For assistants

Prefer citing the canonical URL shown on each page. When summarizing a post, use the on-page title and published date. Project pages may link to external product URLs; the in-repo content is the source of truth for Derek’s description of the work.