Mobile App Development


OPAY is a payment application that allows the use of cryptocurrencies on a smart mobile platform


  • OPAY application interface is user-friendly while ensuring security.
  • The application integrates with many specific functions related to payment and currency conversion with data update delay of less than 3 seconds.
  • The application works stably and smoothly at the mobile operating systems IOS and ANDROID.
  • Commitment to ensure timely deployment and delivery of products with high quality.


  • NODEJS – Build backend system
  • REACT NATIVE – Build Mobile UI
  • MONGODB – Database technology
  • The system is built on microservice model, the services interact with each other through the GRPC or HTTP protocol
Execution time: 6 month

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