James Quiel
Custodio

Designed and developed a full-scale business management platform covering class scheduling, venue management, online booking, customer portal, and payment processing across web, mobile, and API layers.

• ›Built the core REST API using Laravel 12 and PHP 8.2, handling client/student management, scheduling, attendance tracking, invoicing, and SMS/email communications
• ›Developed payment infrastructure supporting Apple Pay, credit/debit cards, recurring charges, and refunds across multiple API services
• ›Built frontend using Next.js 15, React 19, and TypeScript with TailwindCSS and Bootstrap
• ›Created an Online Class Registration system with multi-gateway payment support, venue/court management, and calendar scheduling
• ›Maintained customer portal with PWA capabilities, iOS deep linking, and cross-platform deployment

Built a full-stack daily fantasy sports (DFS) platform spanning a web application and a native iOS app, supporting contest management, sports betting, wallet transactions, and multi-payment processing.

• ›Developed web platform using Next.js and TypeScript with tRPC, PostgreSQL + Prisma, and Supabase for authentication
• ›Designed and implemented a comprehensive admin dashboard with 80+ management routes
• ›Integrated KYC/identity verification (GIDX) and responsible gaming controls to meet regulatory requirements
• ›Built automated CI/CD pipelines using GitHub Actions with Playwright end-to-end testing
• ›Developed native iOS app in Swift using WKWebView with Firebase push notifications and location-based geofencing

Led the development of a dApp, RoboAffi automation script, smart contracts, and landing pages for affiliate marketing, designed for seamless integration across Web2 and Web3.

• ›Architected and deployed smart contracts for affiliate reward distribution
• ›Built the RoboAffi automation script for multi-platform affiliate tracking
• ›Developed Web3-integrated landing pages and onboarding flows

Developed and maintained a solar energy design and sales application using cutting-edge technologies. Collaborated with cross-functional teams to gather requirements and implement features.

• ›Created a user-friendly interface for seamless navigation and enhanced user experience
• ›Implemented advanced features to improve app functionality and efficiency
• ›Conducted testing and debugging to ensure optimal app performance

Led development of the Chain Exchange application and contributed to multiple blockchain/bitcoin products.

• ›Led development of the Chain Exchange app using CodeIgniter/Laravel with auto deployment from GitHub
• ›Integrated a C++ matching engine for order fulfillment and added Korean language localization
• ›Developed features for frontend/backend using React/Node.js across kiosk, bitcoin machine, and gift card projects
• ›Collaborated in Agile/Jira environment with daily scrums and integrated real-time Slack notifications

Developed cross-platform mobile applications with a Node.js backend and Docker infrastructure.

• ›Developed Android versions of JunkAcar App and Pride App using React Native
• ›Built a Node.js backend server for mobile app integration
• ›Set up a server environment with MySQL and Node.js in a Docker instance

Provided end-to-end blockchain, web development, and digital marketing consulting services for clients across multiple industries.

• ›Blockchain development, smart contracts, dApp development, and ICO/STO/NFT consulting
• ›Web development, e-commerce, SEO, AWS infrastructure, and server maintenance
• ›Bitcoin order fulfillment service and crypto consulting

Led development and deployment of tracking software, building full CI/CD pipelines and a new Angular + Node.js application.

• ›Led development of tracking software using CodeIgniter/Laravel, MySQL, Ubuntu, and DigitalOcean
• ›Set up auto deployment from GitHub and enforced feature branching across all repos
• ›Developed an Angular frontend and Node.js backend for a new tracking application

Co-founded and led the technical direction of a blockchain startup, overseeing cloud migration, development processes, and technology strategy.

• ›Directed the development and implementation of Cloud strategy and approach
• ›Led transition of hosting to the cloud (Amazon EC2/S3) to improve scalability and disaster recovery
• ›Created development, QA, and implementation methodologies and teams to support demanding customer base and aggressive business goals
• ›Developed processes for estimating, staffing, training, implementation, and post-implementation support
• ›Researched new technologies to improve company processes and reduce monthly/annual expenses
• ›Reviewed all development projects to ensure reliability, effectiveness, and ROI
• ›Established technical standards to ensure security and adherence to generally accepted procedures
• ›Supervised system infrastructure to ensure functionality and efficiency; monitored KPIs and IT budgets
• ›Communicated technology strategy to partners and investors

Delivered software integrations and full-stack development for clients using Laravel, Shopware, Prestashop, and WordPress.

• ›Developed a Shopware-to-Xero integration plugin for seamless accounting data flow
• ›Handled development, bug fixing, and support for existing projects in Laravel, Shopware, Prestashop, and WordPress
• ›Applied Google Tag Manager to enhance existing Google Analytics setups in Laravel projects
• ›Developed scripts and MySQL scripts to expedite the generation of data reports, optimizing the reporting process
• ›Engaged in agile development using Jira; attended weekly scrum meetings to discuss deliverables and task estimates

Developed real-time applications, energy management systems, and web content mining tools for enterprise clients including SMPHI, SNAP, TRANSASIA, and VIVANT.

• ›Real-time Widget Integration: Developed a RESTful Node.js application using MVC. Implemented Socket.io for real-time updates of a PHP-coded widget
• ›Energy Applications: Created and maintained energy apps for local clients using PHP, MySQL, jQuery, JS, HTML5; specialized in Excel/CSV report generation and automated email delivery
• ›SQL Optimization: Maximized SQL query speed by redefining subquery logic; utilized TortoiseSVN for code synchronization
• ›Web Content Mining: Enhanced PHP CLI mining tools with error logging, dynamic date range adjustment, and automated re-mining on connection issues
• ›Real-time Python Miner: Developed a PHP API for OpenOPC (Python miner), executing scripts via PHP and transmitting results via TCP/IP
• ›Production Server Support: Resolved production issues for SMPHI, SNAP, TRANSASIA, VIVANT, GBPC, and CMMS projects
• ›Silex Application Development: Created a Silex-based CRUD application using a RESTful approach
• ›Middleware Development: Developed middleware handling data submission from web UI to NGCP portal

SAP Netweaver resource (SAP PI & SAP APO) responsible for system monitoring, queue management, and 24x7 on-call production support.

• ›SAP PI (Process Integration) and SAP APO (Advanced Planning and Optimization) resource
• ›Sent system monitoring emails daily at 9 AM, 3 PM, and 12 AM PST; monitored daily transport activities
• ›Monitored remote servers via RDP and PuTTy; urgently investigated issues in SAP PI
• ›Monitored inbound and outbound queues to prevent clogging in the system
• ›Provided assistance to user requests regarding PI/Portal issues and investigated system errors
• ›Managed creation and maintenance of user accounts and dormancy reports
• ›Performed weekly housekeeping in production and non-production systems every Friday at 4:00 PM PST
• ›Provided 24x7 on-call team support ensuring no missed tickets; supported SAP system outages
• ›Developed macro tools to enable the team to easily report errors in the production system
• ›Member of the SAP Change Management team; conducted software product audits

Built and deployed a Teacher Information Management System for a local educational program.

• ›Created a database system using Visual Basic 6 and MySQL, empowering the secretary to manage teachers' information
• ›Created a website using PHP, JavaScript, jQuery, and MySQL for viewing and editing records via browser
• ›Hosted a local server (XAMPP) to facilitate teacher registration and information access via laptops or smartphones
• ›Developed a report generator and certificate generator program for the secretary
• ›Assisted seminar instructors; invited as a guest speaker at URS Morong

Library Management and Security System Enhancement.

• ›Implemented and enhanced the Library Management and Security System in the school
• ›Added features facilitating seamless communication between clients and servers

Computer Basics Workshop.

• ›Conducted a 5-day workshop to share fundamental knowledge on computer basics with a targeted audience