Payment integration
Payment gateway integration — UPI, cards, net banking, wallets, subscriptions and refunds — with webhooks, reconciliation and secure handling.
Payments that reconcile to the last paisa.
6 deliverables, a 4-stage approach and 5 related technologies.
Overview
Payment integrations must handle the messy reality of money: abandoned checkouts, delayed confirmations, duplicate webhooks, partial refunds and settlement reports that need reconciling.
We integrate gateways such as Razorpay, Cashfree, PhonePe, Stripe and PayPal, verify every webhook signature, store amounts as integers in the smallest currency unit, and build reconciliation against settlement reports.
What we deliver
- Gateway selection guidance
- Checkout and payment flows
- Webhook handling with signature verification
- Refunds and partial refunds
- Subscription and recurring payments
- Reconciliation reports
Use cases
Typical situations where this service is the right fit.
Online fee and invoice payments
Let customers pay invoices or fees online with receipts.
Subscriptions
Recurring billing with retries and dunning.
Marketplace payouts
Split payments where regulations and gateway features allow.
How we work
The stages we follow. Each ends with something you can review.
- 01
Never trust the browser for payment status
- 02
Verify signatures and amounts server-side
- 03
Make payment handling idempotent
- 04
Reconcile with settlement reports
Things to consider
Questions worth answering before you commit budget.
- Card data should stay with the gateway; we avoid handling raw card numbers.
- Payment aggregator and data rules (such as RBI guidelines in India) affect architecture.
Technologies and engagement
Technologies we often use
We choose the stack with you; this is a starting point, not a requirement.
Ways to engage
- Fixed-scope project with milestones
- Dedicated team billed monthly
- Ongoing support and improvement retainer
Frequently asked questions
Solutions that use this service
School management
Run admissions, academics, attendance, fees, exams, transport and parent communication on one platform.
Financial software
Accurate, auditable software for lending, collections, reconciliation and financial operations.
Payment processing
Collect payments online with reliable confirmations, refunds and reconciliation.
Related services
E-commerce development
Storefronts on Shopify, WooCommerce, Magento or custom stacks — catalogue, checkout, payments, shipping, tax and back-office integration.
API development
REST and GraphQL APIs with versioning, authentication, rate limiting, documentation and SDKs for internal and external consumers.
SaaS product development
Architecture and build of software-as-a-service platforms: tenancy, billing, onboarding, admin consoles and operational tooling.
Ready to talk about payment integration?
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