About Me

I'm Allan Celedonio, a full-stack developer with over 15 years of experience building web applications, APIs, business systems, and custom software. I enjoy taking an idea, figuring out how it should work, and turning it into something real, reliable, and useful.

Most of my work sits across the entire stack. I build the interfaces people interact with, the backend logic that powers them, the databases that store the data, and increasingly, the infrastructure that keeps everything running. I like understanding how all of those pieces fit together rather than treating them as separate problems.

Over the years, I've worked with different teams, projects, technologies, and production environments. That experience has taught me that good software isn't just about writing code. It's about making sensible decisions, keeping things understandable, solving problems without unnecessary complexity, and building something that can still be maintained years later.

How I Think

Keep things simple where simple is enough
Build for real-world use, not just the happy path
Performance matters, especially as systems grow
Write code that another developer can understand
Choose practical solutions over unnecessary complexity

Toolkit

These are some of the technologies and tools I've worked with over the years to build, deploy, and maintain software.

PHP C++ Python NodeJS JavaScript TypeScript HTML5 CSS3 React Tailwind Bootstrap jQuery Templating REST APIs MVC Authentication Encryption SSO MariaDB MySQL Postgres Redis MongoDB InfluxDB Docker Docker Compose Traefik Apache Linux Cloudflare Git Composer npm Postman VS Code Figma Photoshop Gimp

AI-Assisted Workflow

I also use AI as part of my development workflow — not as a replacement for understanding the code, but as another tool for exploring ideas, solving problems, and working through difficult technical challenges.

ChatGPT Claude GitHub Copilot Gemini Ollama

What I Care About

I like building things that make sense. That means software that performs well, systems that are easy to understand, and architecture that doesn't become a problem six months down the road.

Whether I'm starting something from scratch, improving an existing application, or figuring out why something isn't working, I approach it the same way: understand the problem, build the right solution, and keep it as clean as possible.