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Portfolio '26

Sean
Dexter
Lagmay

Software developer crafting Web3 applications, full stack products, and mobile experiences with modern frameworks.

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Projects

Projects I've built across my journey as a developer.

2026

Prepaid SIM and eSIM for travelers and seafarers with hassle free activation, affordable data abroad, and staying connected with loved ones worldwide.

PostgreSQLNext.jsTailwind CSS
2026

St. Pio Bridges Autism App

Helps parents support their child with autism through guided home therapy with expert backed content, AI chatbots, and RAG for personalized guidance.

FlutterDartNode.js+5

Mobile-friendly PWA for tracking daily macros, meals, and gym workouts. Data is stored locally in the browser, so no account is required.

Next.jsTypeScriptTailwind CSS
2025

Local delivery website scoped to Tagum City where you can order, track, and get goods delivered within the area in a few clicks.

Next.jsTailwind CSSMySQL

On-device budget tracker. All data stays in SQLite in your browser (IndexedDB) — nothing is sent to a server.

Next.jsTypeScriptTailwind CSS

Food redistribution system that connects extra food with people who need it, so aid is easier to share and less food goes to waste.

Next.jsTypeScriptMySQL
2025

Insurance platform to look up a person’s coverage and quickly see if a policy is still active or already expired.

Next.jsTailwind CSSMySQL
2024

A confidential, judgment free HIV testing appointment system that prioritizes user privacy and anonymity. Built with secure booking so users can schedule appointments without revealing their identity.

Next.jsTailwind CSSEmailJS

Agriculture management system that connects farmers, suppliers, and administrators on a single platform.

Next.jsTypeScriptMySQL

Skills & Stack

Technologies I work with across frontend, backend, mobile, and Web3.

01

Frontend

  • HTML
  • CSS
  • JavaScript
  • TypeScript
  • React
  • Next.js
  • Vue.js
  • Quasar
  • Tailwind CSS
  • Bootstrap
  • Material UI
  • Shadcn/UI
  • Headless UI
  • Vite
02

Mobile

  • Flutter
  • React Native
  • Expo
  • Android Studio
  • Java
  • XML
03

Backend & APIs

  • Node.js
  • Python
  • RESTful APIs
  • Axios
  • MySQL
  • PostgreSQL
04

Web3

  • Web3.js
  • Ethers.js
  • Wallet Integration
  • Smart Contracts
  • dApp UI
05

Tools & Collaboration

  • Git
  • GitHub
  • GitLab
  • Figma
  • Postman
  • VS Code
  • Cursor
  • Trello

About

Based in

Philippines

Education

BS Information Technology

STI College · Magna Cum Laude

I'm a software developer with experience across Web3, frontend, and full stack — from responsive dApps and wallet integrations to REST APIs and mobile apps.

React, Next.js, and Vue.js on the web; Ethers.js and Web3.js for blockchain; Flutter and React Native for mobile. I ship from Figma to production with clean code and close collaboration.

Problem SolverQuick LearnerTeam PlayerDetail Oriented

Recognition

Awards from competitions and professional certifications.

Awards

STI Symposium

Best Research AwardFrontend Developer / QA Specialist
2024

STI Tagisan ng Talino

National Level FinalistCluster Level ChampionLocal Level Champion
2023
Get in touch

Let's work together

Have a project in mind or want to collaborate? I'm always open to discussing new opportunities.

seandexter.dev@gmail.com