Hi, I’m Justin Marcus "JM" Andrada
Full Stack Developer | Web & Mobile Systems | Scalable Systems & Automation
"If you’ve seen it, I can do it."
HTML5
CSS3
Tailwind
JavaScript
TypeScript
React
React Native
Expo
Next.js
Node.js
Vite
PHP
WordPress
Ruby
Ruby on Rails
Python
Django
Flask
Supabase
Docker
SQLite
PostgreSQL
MySQL
Redis
Firebase
GitHub
Nginx
CircleCI
Jenkins
AWS
Digital Ocean
Vercel
Heroku
Cloudflare
Azure
App Store
Google Play
Jira
Twilio
Stripe
Swagger
Figma
MCP Server
Claude
ChatGPT
Mistral
RAG
PostHog
About Me
I build full-stack systems that solve real business problems. You share the challenges, and I deliver custom workflows andscalable platforms tailored to your needs, includingAI integrations for smarter automation and decision support. From streamlining operations toimproving user experience, my goal is to make technology drive results for your business.
Every system I take on is built from ground zero to production: architecture, database, backend, frontend, mobile, deployment, and post-launch support, owned end to end. That includes the client work I am not able to name here.
My Workflow
Design
Business Flow
Development
Testing
Deployment
Documentation
Training (Optional)
Public Production Systems
Live systems I designed, built, deployed, and still maintain. Every link below goes to the real product in production, so the work can be checked rather than taken on faith.
Selected public projects only. Additional systems and client engagements are not listed here due to confidentiality and client disclosure restrictions. These are the projects where public attribution or portfolio use is permitted.
Verifiable attribution. Where a live system carries JMCA or JMA in its footer, that is my signature on the deployed product. It is a direct line between the running system and the person who built it.
QARC Mobile App
The companion mobile app for Quadro Alas Review Center, built with React Native and Expo for iOS and Android and published on the App Store and Google Play. Features include timed 100-item mock board exams with auto-submit and instant scoring, on-demand video lectures with resume playback and offline downloads, reviewer notes, a personal performance dashboard with per-subject history, per-exam rankings and the Hall of Aces, the official QARC shop with cart, checkout, and proof-of-payment upload, push notifications for announcements, deep links, and an admin mode for managing announcements, lectures, orders, and users, all backed by the same Rails API as the web platform.
Pusoy Dos Online
An online version of Pusoy Dos, a card game I really love and wanted to bring to the web in a smooth and accessible way. Features include real-time gameplay, room creation and joining with codes, player reconnection, turn-based flow, built-in rules pages, and a clean game experience designed to make it easy for friends and other players to jump in and play from anywhere.
TyreMag Management System
A tire trading management system built to keep daily operations fast, organized, and easy to monitor. Features include branch-based inventory tracking, supplier management, stock purchases, customer order processing, daily transmittals, finance overviews, and detailed reports for sales, movement, and overall business performance, helping staff and management handle operations in one central system.
UB SN COMPASS
A clinical outcomes monitoring and performance assessment system for the University of Baguio School of Nursing. Features include a role-based platform for students, faculty, coordinators, program chairs, the dean, and administrators, clinical competency matrices with per-rotation progress tracking, grade encoding with grading-period breakdowns, approval, rectification, and transmutation workflows, RLE rotation tracking for clinical learning experiences, student records with class sections, programs, courses, and year-level coordination, per-student and per-course rankings, assigned-task tracking with completion progress, targeted announcements and document distribution, CSV student import, and configurable grade computation. Built with React and a Django REST API, containerized with Docker and deployed on DigitalOcean with managed Postgres and Spaces storage behind Cloudflare.
UB ACCESS
An university system for managing users, offices, documents, and planning. Streamlines workflows with hierarchical user management, automated approvals with QR Signatures, progress tracking, accomplishments, document handling, and notifications for seamless communication. Includes an AI Chat with university knowledge base integration for report generation and data analysis.
Lola Lucing's Resto Management System
A restaurant management system with integrated POS using order slips (no official receipts). Features include landing page, branch and department management, sales tracking, dynamic discounts, inventory and ingredient integration, staff and owner roles, cash counter with end of day remittance and comprehensive sales reports by time, department, and product.
Quadro Alas Review Center
A dynamic review application for Criminology students in the Philippines. Features include landing page, targeted announcements for memberships, membership-based roles, a custom streaming platform for video lectures, integrated notes view, dynamic exams by category with custom and image-based questions, question importing, individual user performance tracker, exam ranking by first attempts and overall and a dynamic hall of top notchers for motivation and engagement.
Professional Review Buddy
A dynamic review application for students taking the LET examinations in the Philippines. Features include landing page, exam creation with question import and multiple exam types, announcements, user management with dynamic membership pricing and descriptions, notes, referral system with invitation links for commissions, bulk question imports, daily challenges, exam streaking for mastery with performance tracking and Payment integration.
UBCLNDNT
A system application designed for managing student data, scoring, and grading for fast and efficient record keeping. Features include clinician and instructor announcements, dynamic creation of procedures, user-friendly creation of forms with dynamic scoring and grading, multiple views for clinicians, instructors, chiefs, and admins, automatic score computation, real-time clinician view of scores, statuses, and instructors, whitelisting of clinics for instructors and students, overall grade generation, logging of scores, real-time scores and grading with notes for additional information, and penalty tracking for students.
HBS Service
A full stack e-commerce and stock management platform designed for fast and efficient product management and customer interaction. Features include a dynamic landing page reflecting products based on inventory input, a functional employee portal for adding, editing, and managing products, sales, and inventory, integrated email mailer for customer inquiries on product details and pricing, responsive design for smooth interaction across all devices, analytics for sales tracking, secure login and role-based access for employees, migration from PHP to a modern React framework, and a fully deployed website ensuring reliable performance and scalability.
Built From Ground Zero to Production
Every system I have shipped, public or confidential, started as an empty repository and ended as software a business depends on daily. I am not brought in to patch someone else’s project. I own the full lifecycle, from the first schema to the production server it runs on.
Started at zero
Empty repository, blank database, a business problem written on a call. No inherited codebase, no template, no team to hand the hard parts to.
Built end to end
Schema, API, business logic, frontend, mobile apps, admin tooling, and the reports the client actually runs the business on.
Shipped to production
Servers provisioned, domains and SSL configured, CI/CD wired, backups in place, app store releases submitted and approved.
Kept running
Live with real users, real data, and real money. Monitored, maintained, and improved long after launch day.
Confidential Client Work
A significant part of my work cannot be shown here. Some engagements are covered by NDAs, some ship white-labeled under the client’s own brand, and some are internal systems the client owns outright. Those platforms are live and in daily use. I simply do not have the right to publish the client, the branding, or the screenshots. What I can share is the category of work, and that each one was built from ground zero to production exactly like the systems above.
Delivered for clients and companies in the United States, Australia, the Middle East, and the Philippines.
Inventory & Order Management SaaS
Multi-tenant stock and order platforms with vendor management, supplier accreditation, barcode handling, low-stock alerting, and subscription billing.
E-Commerce with Payments & Shipping
Custom storefronts wired to real payment gateways and freight-quote shipping, with bulk and custom orders, tax and tariff handling, coupons, and fulfillment tracking.
Compliance & Risk Management
Assessor and vendor compliance platforms supporting custom assessment frameworks, risk registers, document repositories, and AI-assisted report analysis.
Enterprise Workflow & Document Control
Role-based routing, multi-level approvals, digitally signed documents with QR verification, audit trails, and standards-aligned process integration.
Hiring & Workforce Platforms
Mass-hiring portals with organization-side dashboards, applicant pipelines, subscription billing, and companion iOS and Android apps.
Booking, Scheduling & Attendance
Reservation and slot management, recurring schedule generation, team and roster administration, attendance tracking, and integrated payments.
Web-Connected Mobile Apps
React Native companions to existing platforms, shipped through the App Store and Google Play with push notifications and offline support.
AI Integrations & Internal Knowledge Bases
RAG chatbots grounded in company data, AI-generated reports and analysis, and MCP tooling wired into existing systems.
Business Management, POS & Reporting
Point of sale, cash handling and remittance, multi-branch operations, and the daily, monthly, and yearly reports owners actually run the business on.
Automation & Document Pipelines
Scrapers with pricing logic that automate ordering and flag margin, CRM integrations, PDF generation, appending, and watermarking at scale.
Client names, screenshots, and technical detail are shared only where disclosure is permitted, typically under NDA or with written client approval. If a specific system matters to your evaluation, ask and I will tell you exactly what I am able to show.
Want a Comprehensive Demo?
If you’d like a detailed walkthrough of these systems or want to explore how I can build a custom solution for your business, feel free to reach out. I’d be happy to schedule a demo and discuss how these workflows can fit your needs. Beyond the public projects above, there are unreleased and client-owned systems I can walk through directly where disclosure terms allow, including e-commerce platforms, booking systems, attendance trackers, PDF appender/watermarker tools, web-connected mobile applications, job platforms, and messaging applications.