erzan@Projects\portfolio-v2\apps\web ~
echo"Hi I'm Earl Jan Do! [Erzan] I'm a FullStack Developer, Welcome!"
echo""

I build scalable backend systems & modern web platforms

Full-stack developer specializing in ERP systems, APIs, and developer platforms — focused on performance, clean architecture, and real-world scalability.

Stuff I’m currently building or messing around with 👇

    Portfolio revamp (this one)
    Ongoing
    Personal Docs on Docusaurus (already deployed)
    Ongoing
    Blog Page section in development and will be self-Hosted CMS with Supabase and Drizzle ORM
    Ongoing
    Simple dev tools (experimenting)
    Queue
    Side project — Product Inventory System ERP
    Ongoing
    Side project — Laravel Projects
    Queue

Featured Projects

Portfolio Preview
Portfolio

My portfolio website built with React, Next.js, and TailwindCSS

React
NextJS
TypeScript
Tailwind
Product Inventory Preview
Product Inventory

Inventory management system with NestJS, Prisma, and PostgreSQL

NestJS
Prisma
PostgreSQL
Docker
Code
Docs Platform Preview
Docs Platform

Developer documentation platform using Docusaurus

Docusaurus
TypeScript
React
Livestock Tagging and Profiling Management System Preview
Livestock Tagging and Profiling Management System

Livestock management system

Laravel
PHP
Blade
Vite
SaaS
Code
QR-Code Attendance Management System Preview
QR-Code Attendance Management System

This project are for faculties and students scanning for generated qr code for convenient attendance during events

Laravel
PHP
Blade
Vite
Code
SLSU Clinic Appointment System Preview
SLSU Clinic Appointment System

This project is intended for the uninersity clinic to be paperless and all the appointments will be made online

Laravel
PHP
Blade
Vite
Code

Technical Stack

Backend Development

Architecting scalable server-side systems and RESTful APIs with a focus on performance and clean code.

NestJS
PHP
Laravel
CodeIgniter
Node.js
Express
Frontend

Building interactive, high-performance web interfaces.

React
Next.js
TypeScript
Tailwind CSS
Framer Motion
DevOps

Streamlining deployment workflows.

Docker
Linux
Git
Vercel
CI/CD
Databases

Relational modeling and query optimization.

PostgreSQL
MySQL
Prisma
Redis

Case Study

SLSU Clinic Appointment System

Problem: Manual appointment handling caused long queues and inefficient scheduling.

Solution: Built a web-based system using Laravel + MySQL to digitize booking and streamline clinic operations.

Challenges: Handling concurrent bookings and ensuring data consistency.

Outcome: Reduced manual workload and improved scheduling efficiency.

How I Think

Scalability First

I design systems that can grow, not just work for today.

Clean Architecture

Maintainability and structure matter more than quick hacks.

Performance Mindset

I constantly look for optimizations and efficiency improvements.

Depth Over Trends

I focus on mastering tools instead of chasing every new tech.

Experimental Lab

Dev Tools Platform

Planning a collection of tools for developers.

UI Component Experiments

Testing animations, layouts, and interaction patterns.

API Playground

Exploring scalable API patterns and structures.