Jerico – Laravel, React, PHP

Health information and HR management system spanning 13 modules across two rural health units. Covers patient records, staff and HR workflows, and a patient-facing portal, with role-based access and full audit trails.

• Designed and delivered all 13 modules end to end as the sole developer
• Implemented role-based access control and audit logging across every module
• Built a Barangay Health Workers portal for verifying and encoding citizens' records
• Built a patient/citizen portal for records access
• Provisioned and deployed the system on AWS Lightsail

A civil registry system with digital PSA Form 102/103 replicas, overlay printing, print calibration, and certificate modules.

• Digitized issuance of birth, death, and marriage certificates, replicating official government form layouts
• Built a PDF-overlay printing pipeline to print certificates onto pre-printed physical stock
• Developed a drag-and-drop print-calibration tool so output aligned precisely with physical forms
• Implemented role-based access control with full audit trails

A specialized electronic medical records suite for medical practices. Clinic-grade EMR platform covering patient records, clinical documentation, and appointment and visit management, delivered as a React front end on a Laravel API with role-based access for clinical staff.

• Built appointment scheduling, patient records, and a detailed clinical chart interface.
• Implemented SOAP notes, vitals and GCS tracking, prescriptions, and surgical history.
• Developed a surgery operations module covering pre-op checklists, operative notes, post-op assessment, surgical team assignments, and live case-status tracking.

Legislative tracking system for a local legislative body. A React session-hall interface used by members and a secretary for agenda management and live voting, backed by a Laravel API, paired with a public Transparency Portal that surfaces legislative records to citizens.

• Built the session-hall React SPA for agenda management and live in-session voting
• Developed a public-facing Transparency Portal for legislative records
• Delivered a fully on-premise deployment (application and database server, SSL) suited to a body with no cloud infrastructure
• Owned the project end to end, including the hardware and infrastructure requirements

Company website and portfolio for a software development business, built as a fast, mobile-first single-page application. Presents services, client work across multiple sectors, R&D, and engagement pricing, with complete on-page SEO and live visitor analytics through a custom server-side pipeline. Includes an interactive resume with scroll-based section highlighting and a downloadable CV.

• Architected and built the full stack with Laravel, Inertia, and Vue 3, styled with Tailwind CSS
• Implemented complete technical SEO: structured metadata, Open Graph/Twitter cards, schema.org data, XML sitemap, and robots configuration
• Integrated Google Analytics 4 through a custom server-side data pipeline with a live stats section rendered on the site
• Designed a responsive, mobile-first interface with reusable Vue components and scroll-based interactions
• Tuned the site for performance and search visibility, validated with Lighthouse

Operations management SPA for a CCTV and physical-security solutions provider. Single-page React application for managing day-to-day business operations, built as a responsive Vite and Tailwind interface

• Built the SPA architecture in React with Vite for a CCTV and physical-security operations client
• Designed a responsive, component-based UI with Tailwind CSS
• Delivered the day-to-day operations workflows the client's team now uses daily

Web-based learning platform with class join-codes, course/content management, enrollment, quizzes, grading/gradebook, role-based dashboards, Excel/CSV question import, real-time updates, and exam-proctoring mode.

• Built the full assessment lifecycle — authoring, Excel/CSV import, attempts, grading, and gradebook export
• Implemented Examplify-style proctoring (forced fullscreen, tab/minimize detection, blocking overlay, audit log)
• Added Google OAuth sign-in for students and an admin-approval flow for teacher accounts
• Deployed to production and handled real student-batch load

Integrated campus management platform for a higher-education institution, replacing manual, paper-based processes with a centralized web application — student enrollment (registration, subject loading, section assignment), role-based faculty/student portals, and end-to-end grade management.

• Led end-to-end development of the enrollment, portal, and grading modules as the sole developer
• Designed the relational database schema and application architecture in PHP and CodeIgniter
• Built a student enrollment module handling registration, subject loading, and section assignment
• Developed separate role-based portals for faculty and students
• Implemented a grade management module covering grade encoding, computation, and reporting

Secure web platform letting instructors encrypt, store, and share e-learning videos, and students access/decrypt them for coursework. Built around a custom, performance-optimized AES-128 variant that replaces MixColumns with bit-permutation and cuts the cipher from 10 rounds to 6 — reducing encryption time by ~77% and decryption time by ~55% while keeping the avalanche effect above the 50% security threshold. Includes role-based user management, secure key storage, on-the-fly upload encryption, and email-verified file sharing.

• Designed and implemented a modified AES-128 cipher (bit-permutation instead of MixColumns, 6 rounds instead of 10), achieving ~77% faster encryption and ~55% faster decryption than standard AES
• Validated the cipher's security via the Strict Avalanche Criterion (52.92% avalanche effect vs. the 50% minimum threshold)
• Built the file management application end to end: user management, key storage, upload, sharing, and download
• Published the results in a Scopus-indexed journal