Leodyver S. Semilla

I just want to build something meaningful.

Oriental Mindoro, Philippines

About

I’m an aspiring full-stack software engineer focused on building practical, real-world products across the stack, from backend systems and developer tooling to frontend interfaces and UI/UX.

My capstone project, ProcuChain, is a blockchain-powered document management system used by Bids and Awards Committees to improve transparency and document integrity in procurement workflows.

I’m also active in cybersecurity and competitive problem-solving, earning the highest individual regional score in Hack4Gov 3 and qualifying for the national finals through a wildcard slot. Outside of projects, I contribute to open source—including Mihon, explore CTF challenges, and continuously improve my engineering skills.

Selected Work

ProcuChain

Solo-developed blockchain-powered Document Management System for Bids and Awards Committees. Built with MultiChain for secure, tamper-resistant storage and transparency.

Laravel React MultiChain Heroku

SaliksikHub

An open-source, self-hosted academic journal management platform. Designed as a modern alternative to OJS with full plugin system, theme support, and multi-journal management.

Laravel PHP React TypeScript

PayMongo CLI

A developer CLI for PayMongo local webhook testing, payment intent workflows, and integration debugging.

Node.js TypeScript Oclif ngrok

Tech Stack

PHP logo PHP
TypeScript logo TypeScript
Laravel logo Laravel
Node.js logo Node.js
NestJS logo NestJS
React logo React
React Native logo React Native
Next.js logo Next.js
Expo logo Expo
Convex logo Convex
Inertia logo Inertia
tailwindcss logo tailwindcss
Shadcn UI logo Shadcn UI
MySQL logo MySQL
Docker logo Docker
Git logo Git
GitHub Actions logo GitHub Actions
Blockchain logo Blockchain
CTF logo CTF

Skills

  • Full-stack web development
  • REST API design & integration
  • Authentication and role-based access control
  • Database design and optimization
  • Blockchain-powered app development
  • Cybersecurity and CTF problem solving
  • AI-assisted development
  • CI/CD automation and developer tooling
  • Technical documentation and knowledge sharing

Recognition

Hack4Gov 3 Regional Highest Scorer & Wildcard National Qualifier

2024

Achieved highest individual score in the regional round, earning a wildcard qualification to the national finals of this government-focused cybersecurity competition.

Binary Blitz

Binary Challenge
Convert decimal to 4-bit binary
Score
0
0101

Hidden

Register: 2³ 2² 2¹ 2⁰----

Get in Touch

I'm currently looking for new opportunities. Feel free to reach out if you'd like to work together.

leodyversemilla07@gmail.com