Restaurant groups, retail chains, self-service kiosk startups, and event ticketing platforms frequently search to hire a freelance Point-of-Sale (POS), Stripe Terminal, Adyen Terminal API, Square & self-checkout kiosk programmer. I am Aldian Fazrihady, a Senior Freelance Full Stack & Mobile Programmer.
Core In-Person Payments & Retail POS Engineering Capabilities
- Stripe Terminal & Smart Reader Integrations (BBPOS WisePOS E / Stripe Reader S700): Building server-driven and React Native / Android SDK card-present EMV/NFC tap-to-pay checkout flows with automatic tipping, offline payment queuing, and split-tender receipts.
- ESC/POS Thermal Receipt & Kitchen Display System (KDS) Routing: Printing orders directly to Star Micronics / Epson thermal printers over LAN/Bluetooth/WebUSB and synchronizing real-time KDS screens via WebSockets.
- Omnichannel Loyalty & Inventory Unification: Unifying in-store POS purchases with online e-commerce customer profiles and warehouse stock in real time.
Frequently Asked Questions
What happens if the store's internet drops while customers are checking out at a kiosk or POS?
I architect offline-capable IndexedDB/SQLite product catalogs and Stripe Terminal offline mode queuing so in-store transactions continue seamlessly and sync automatically when internet connectivity returns.
How do I hire you for POS, Stripe Terminal, or retail kiosk software?
Hire me via Upwork.