~/portfolio/leodyver
Available
Aspiring Software Engineer

Leodyver S. Semilla

Oriental Mindoro, Philippines
GMT+8
Resume [PDF]GitHubLinkedInX
01 //

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 refine my engineering craft.

02 //

Work Experience

1 Role

Backend Developer Intern

Hytec Power Inc.•Novaliches, Quezon City
Feb 2026 – Apr 2026
  • ›Built and maintained core modules of an internal HRIS in Laravel, streamlining employee records and HR workflows across the organization.
  • ›Implemented API rate limiting across key endpoints to prevent abuse and ensure fair resource allocation, improving system stability during peak usage.
  • ›Designed and shipped a maintenance-mode feature with a custom status page, enabling smoother, zero-surprise deployments and reducing user-facing downtime.
  • ›Collaborated with the engineering team on code reviews, bug fixes, and backend documentation, improving code quality and speeding up onboarding for new team members.
LaravelPHPMySQLREST APIsGit
03 //

Selected Work

4 Systems
01 //

ProcuChain

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

LaravelReactMultiChainHeroku
02 //

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.

LaravelPHPReactTypeScriptInertia.jsTailwind CSSshadcn/uiMySQL
03 //

PayMongo CLI

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

Node.jsTypeScriptOclifngrok
04 //

Telehealth App

Full‑stack telehealth platform with Next.js frontend, NestJS backend, PostgreSQL, Better Auth, LiveKit video, and real‑time chat.

Next.jsReactTailwind CSSBase UINestJSExpressPostgreSQLPrismaBetter AuthLiveKitSocket.ioNodemailer
04 //

Tech Stack

Segmented Matrix

Languages & Runtimes

PHP logoPHP
TypeScript logoTypeScript
Node.js logoNode.js

Backend & Databases

Laravel logoLaravel
NestJS logoNestJS
MySQL logoMySQL
Docker logoDocker

Frontend & Mobile

React logoReact
Next.js logoNext.js
React Native logoReact Native
Expo logoExpo
Inertia.js logoInertia.js
Tailwind CSS logoTailwind CSS
shadcn/ui logoshadcn/ui
Convex logoConvex

Specialized & Tooling

MultiChain logoMultiChain
CTF / Cyber logoCTF / Cyber
Git logoGit
GitHub Actions logoGitHub Actions
05 //

Core Competencies

Application & System Engineering

  • ›Full-stack web architecture & reactive interfaces
  • ›RESTful API design, rate-limiting & webhook infrastructure
  • ›Role-based access control (RBAC), 2FA & secure auth
  • ›Relational schema modeling & query optimization

Specialized & Security Capabilities

  • ›Blockchain-powered document & audit trail solutions
  • ›CTF problem solving & web vulnerability assessment
  • ›Developer CLI tooling & developer experience automation
  • ›Open-source collaboration & technical documentation
06 //

Recognition

Hack4Gov 3 Regional Highest Scorer & Wildcard National Qualifier

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

competition2024
07 //

Interactive Lab

Binary Blitz v1.0
lab/binary-blitz.exe
High: 0
Score: 0
0101

Decimal to 4-Bit Converter

Flip the 4-bit registers (8, 4, 2, 1) to match the decimal target before time runs out.

Registers: 2³ 2² 2¹ 2⁰0000

Get In Touch

I’m actively looking for software engineering roles and collaborative projects. Feel free to reach out directly.

leodyversemilla07@gmail.comConnect on LinkedIn