Paynoy Store Sales & Inventory System
A store register and sales system for Filipino micro-merchants.
Founding Product Engineer
QUALCOM / Paynoy
2026
Live Beta
Executive Summary & Strategic Overview
Paynoy is a store sales and inventory system for small Filipino shops. It combines fast cash and QR checkout with nationwide GCash audio device delivery.
Verified Performance Metrics & Business Impact
Direct Payout
Paynoy sends customer money directly to merchant GCash accounts with zero fund holding.
Automated Tests
Complete test suite checks every feature across apps and packages.
Fast Cash Checkout
One-tap buttons compute customer change instantly on a single checkout screen.
PSGC Address Engine
Standard Philippine address selector ensures accurate delivery for GCash audio devices.
The Engineering Challenge
Small neighborhood stores face long lines, manual math errors, and fake payment screenshots during busy hours. Traditional cash registers cost too much money. Many payment systems hold merchant funds for days before release.
The Architectural Solution
We built a direct checkout platform with an Astro marketing website and a Next.js store register. It offers one-tap cash change calculations, real-time stock updates, and direct GCash wallet payouts with Supabase security policies.
Core Technical & Architectural Highlights
Direct Merchant Settlement
PostgreSQL row-level security isolates store data and routes payments directly to merchant GCash wallets.
Fast Touch-Screen Register
Zustand state and large 48px touch targets compute change in under 150ms during rush hours.
Standard Philippine Address Engine
Four-level cascading address selectors resolve provinces and barangays for dependable hardware delivery.
Agentic AI Pair Programming & Antigravity Acceleration
We developed Paynoy using Antigravity multi-agent pairing. Automated test-driven cycles verified features across the monorepo.