Razorpay Payment Infrastructure
Bettrlabs’ end-to-end Razorpay payment backend, engineered so that a purchase is never incorrectly granted or lost.
- ownership
- Sole engineer, end to end
- when
- 2026
- org
- Bettrlabs
The film, as text: Razorpay Payment Infrastructure. Bettrlabs’ end-to-end Razorpay payment backend, engineered so that a purchase is never incorrectly granted or lost. Verify: Every payment is verified with Razorpay before anything is granted. Webhooks: Webhook events move the transaction through its states. Idempotent settlement: A duplicate event is recognised by its key and settles nothing twice. Background reconciliation: Late or out-of-sync states are found and reconciled in the background. Failure-safe states: Failed and incomplete payments resolve safely: never granted wrongly, never lost. Sole engineer, end to end, Bettrlabs, 2026.
Problem.
The payment provider, the backend and the client can disagree. Webhooks arrive twice, arrive late, or report a state the database has not yet reached.
How it works
- Payment integration: the complete Razorpay integration, built from the provider’s documentation, covering payment APIs and payment verification.
- Webhook handling: provider events are processed through webhook endpoints, with duplicate and late deliveries accounted for.
- Idempotent settlement: a payment settles once however many times it is reported, so a purchase is never granted twice.
- Failure-safe states: duplicate, delayed, incomplete, failed and out-of-sync payments are each handled explicitly, with fallback and recovery logic.
- Transaction state and database flows: transaction fields and payment state are tracked in the database, with database-level protections that keep that state consistent.
- Background reconciliation: a reconciliation process corrects payment state when the provider, backend and client disagree.
Stack
- Payments
- Razorpay
- Payment APIs
- Payment verification
- Webhook handling
- Reliability
- Idempotent settlement
- Background reconciliation
- Transaction-state management
- Fallback and recovery logic
- Backend
- Python
- FastAPI
- PostgreSQL