Fintech · commerce
Payments & wallet reliability
Local wallets and bank rails behind one payment interface, with idempotency, retries, and reconciliation that survive bad networks.
KotlinWallet & bank SDKsIdempotent APIsReconciliation
Rails
behind one checkout
The problem
Single-provider checkouts fail silently on timeouts; customers retry, double-charge, and support cannot see which rail broke.
What we did
- 01Instrument every checkout step so failures attribute to a rail, not a generic error
- 02Wrap multiple wallets and bank SDKs behind one provider abstraction
- 03Idempotency keys, bounded retries, and reconciliation jobs
- 04Failure UI that explains what happened and offers a working alternative
Outcome
- Higher completed-transaction rates on the same traffic
- Duplicate-charge tickets drop when timeouts stop meaning lost or duplicated orders
- Adding a rail becomes a contained, testable change