mPOS app developement and certifciation

Develop a cloud-based mPOS, with an Android app in Flutter/Dart. The solution will integrate with Visa and MasterCard payment networks to process contactless cards transactions, like a traditional POS device does. It should meet payment industry speciations (Visa, Mastercard, PCI, ..) and pass Visa and Mastercard certification. It should be secure, stable, efficient, and scalable.

Developers should be fluent with ISO 8583 messaging, security keys management, and card transaction protocols.