· Fintech
Fintech Android: JazzCash, Easypaisa and bank gateways behind one checkout
Pakistan shoppers do not pick “card” by default. JazzCash and Easypaisa wallets sit beside UBL, Meezan and Alfalah bank rails. Five separate checkout implementations meant five failure modes — until we unified them and measured +50% transaction success.
The Pakistan mix
Wallets and banks both matter. Treating JazzCash as a one-off WebView and UBL as a different activity guarantees inconsistent retries and analytics. The fix was the same PaymentProvider contract later used for GCC: isAvailable, initiate, confirm, mapError.
What changed after unification
- One success/failure surface in the UI for every provider.
- Provider-level analytics on initiation vs completion.
- New gateways as new classes — not forks of checkout Composables.
Full narrative: payment gateway case study.
How this differs from the GCC post
The companion article One checkout for KNET, mada, STC Pay and Tabby covers Gulf wallets and BNPL on the COFE white-label platform (Tap, Checkout.com, Google Pay). Same architecture idea; different market rails. If you only need GCC, read that post. If you need PK wallets and banks, start here — then extend the same interface to KNET/mada when you expand.
Hiring for this work
Fintech Android developer · payment integration services · contract hire.