AJ Castillo
Web Developer
About Me
I am a web developer with two years of experience creating clean, responsive, and accessible websites. Currently, I am focused on freelance web and mobile development, building custom applications for student clients and small businesses. I am committed to continuous learning and growth as a software developer.
Professional Focus
- Building responsive and user-friendly web applications
- Writing clean, maintainable code and learning modern web technologies
- Finding freelance opportunities and delivering quality solutions for clients
- Integrating AI into my workflow to speed up development and improve productivity
Technologies I’ve Tried
Frontend Development
HTML5, CSS3, JavaScript, TypeScript, Tailwind CSS, Bootstrap, ShadCN
Frameworks & Libraries
React, React Native, Next.js, Express.js
AI & Automation
n8n, YoloAI, LLM Integration
Backend Development
Node.js, PHP, Flask, REST APIs
Databases
MySQL, PostgreSQL, MongoDB
Cloud & Deployment
Vercel, Render, Hostinger, Docker, Google Cloud Run
Development Tools
Git, GitHub, VS Code, Postman
UI/UX Tools & CMS
Figma, Photoshop, Canva, Wordpress, Shopify
Experience
Developer Intern
Exakt IT Services Inc
Contributed to high-visibility web projects including a CMS for Rotary Club of Manila (first Rotary club in Asia, founded 1919), custom Shopify development for a live charitable e-commerce store supporting sister schools, and backend features for internal enterprise products.
Role
Frontend Developer Intern (TechWave) — Developed and customized web pages using WordPress and Shopify for marketing and e-commerce initiatives
Current RoleWeb Developer Intern (Exakt IT) — Contributed to internal system development (DMS) using Spring Boot and React
Web Developer Intern
Tech Executive Labs
Worked as a web developer intern in a startup environment, collaborating with designers and developers to build and deploy web applications. Served as Intern Tech Lead to coordinate development across a small team of fellow student interns.
Freelance Software Developer
Freelance Web & Mobile Developer
Built 5+ custom web applications and cross-platform mobile prototypes for student clients and small businesses. Delivered admin dashboards, CRUD interfaces, and cross-platform apps demonstrating web-to-mobile adaptability.
Projects
AI-powered web and mobile application for detecting common skin conditions using computer vision.
Freelance-built capstone e-commerce platform with delivery management system.
Resort booking system with chat, ratings, comments, and admin customer management.
A route-generation, tracking, and gamified platform for runners and cyclists.
Education
Bachelor of Science in Information Technology
Batangas State University – TNEU Lipa Campus
Pursuing a Bachelor's degree in Information Technology. Gained strong foundations in programming, system design, networking concepts, and real-world software development through academic projects, competitions, and leadership roles.
Key Achievements:
- Dean's Lister for academic excellence
- 1st Place – CICS Week Coding Competition (2024)
- 3rd Place – CICS Week Coding Competition (2023)
Certificates
