About
Alex O’Callaghan is a Principal Engineer at Mintel, a leading global market intelligence agency, where he leads platform engineering and frontend architecture initiatives.
He is an advocate for learning in public and focuses extensively on modern software development practices. His technical expertise spans autonomous AI coding agents, micro-frontend architecture, CDN and edge performance optimization, platform engineering, design systems, and frontend/backend developer tooling across TypeScript, React, Python, and Next.js.
On his personal website alexocallaghan.com, he shares practical, in-depth articles detailing real-world architectural migrations, software supply chain security, test validation for AI agents, and strategies for accelerating engineering team productivity.
You can also find Alex O'Callaghan on:
- Website: https://alexocallaghan.com
- GitHub: awocallaghan
- LinkedIn: awocallaghan
- Bluesky: alexocallaghan.bsky.social
Articles
- Implementing a retrospective agent: how it works
- Parity before cutover
- June Reading List
- Faster micro-frontends: optimising CDN behaviour for performance
- Building my son a Minecraft phonics game with AI
- May Reading List
- Measuring before tooling: where AI investment in engineering should go
- April Reading List
- Hardening npm dependency security
- Caching & CDNs with micro-frontends
- You can't trust agent tests
- Moving fast with agents without losing comprehension
- AI agents and platform teams
- React design system library MCP
- Open sourcing our microfrontend React bridge
- Reflecting on Enterprise Engineering Summit 2025
- Migrating to Vite
- Package exports and eslint-plugin-import