The problem
Wallet users needed to pay contactlessly at physical terminals — which means securely turning a wallet account into a tokenized card on the phone.
What I built
Integrations with multiple card-management platforms to provision and manage Mastercard and Visa tokens, with the API security (OAuth2, JWT/JWE) that payment networks demand.
Outcome
NFC Tap & Pay went live for two wallet providers, letting their customers pay with their phones.