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SaaS E-Payment Services

Full Stack EngineerOne Space Co. LTD2021 — 2023
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Key Highlights

  • 35% revenue growth for the company
  • ~$5K savings per application vs overseas devs
  • Cross-platform mobile apps (React Native)
  • Real-time transaction monitoring
React NativeNode.jsCPOSFintech

SaaS E-Payment Services

Overview

Directed the development of One Pay and One ATM — SaaS e-payment services that transformed the company's revenue model and served multiple merchants with digital payment capabilities.

Products

One Pay

A mobile payment platform enabling:

  • QR code-based payments
  • Merchant onboarding and management
  • Real-time transaction monitoring
  • Settlement and reconciliation

    • One ATM

    A virtual ATM solution providing:

  • Cash-in/cash-out services
  • Balance inquiries
  • Fund transfers
  • Bill payments

    • Technical Architecture

  • React Native mobile apps for cross-platform deployment
  • C application for POS terminal integration
  • Node.js backend with microservice architecture
  • Real-time transaction processing with sub-second latency
  • End-to-end encryption for financial data security

    • Impact

  • 35% revenue growth for the company
  • Eliminated need for overseas developers, saving ~$5K per application
  • Multi-merchant SaaS model generating recurring revenue
  • Real-time monitoring preventing fraudulent transactions
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