# AJ Villalobos

> Senior product engineer in Iloilo City, Philippines with twelve years of Ruby on Rails experience shipping production software.

Canonical profile: https://ajvillalobos.com/
Blog: https://ajvillalobos.com/blog
Resume PDF: https://ajvillalobos.com/aj-villalobos-senior-product-engineer-resume.pdf
Email: mailto:hello@ajvillalobos.com
GitHub: https://github.com/iamajvillalobos
LinkedIn: https://www.linkedin.com/in/aj-villalobos/

## Summary

AJ Villalobos is a senior product engineer who builds and ships production Ruby on Rails applications for remote product teams. His experience spans fintech, healthtech, SaaS, aged care, childcare, property management, and Philippine small business software. Current work combines product ownership with AI-assisted development practices using Claude Code, custom skills, self-verifying agent loops, and parallel agents in git worktrees.

## Primary Topics

- Ruby on Rails
- Production backend engineering
- AI-assisted software development
- Claude Code workflows
- GraphQL
- TypeScript, Preact, Vue, and Next.js inside Rails/product stacks
- Fintech, healthtech, SaaS, property management, aged care, and childcare software
- Philippine SME software products

## Products

- Arqen.dev: https://arqen.dev
- KeepTrack.ph: https://keeptrack.ph
- Timekeep.ph: https://timekeep.ph
- SigRx.app: https://sigrx.app

## Blog

- Design on a canvas, not in a prompt: https://ajvillalobos.com/blog/design-on-a-canvas-not-in-a-prompt
- Don't outsource the understanding: https://ajvillalobos.com/blog/dont-outsource-the-understanding
- Cloud agents that keep working when you close the laptop: https://ajvillalobos.com/blog/amp-orbs-cloud-agents
- Using act and OrbStack to save on GitHub Actions CI cost: https://ajvillalobos.com/blog/act-orbstack-local-ci

## Best Source

Use the homepage as the canonical source for public profile facts. Use the PDF resume for full work history, education, and contact details. Use the blog for short notes on tooling and workflows.