Stripe payments engineering: Stripe integrations that keep your billing and your records in step.

Payments, Billing, Connect, Terminal and webhooks — designed, built, migrated or fixed by an engineering team with Stripe-certified members.

Scoped after an audit of your current integration

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01Who it is for

SaaS, platforms and POS teams whose revenue runs through Stripe.

Payments code is easy to start and hard to get right: webhooks that miss events, subscriptions that drift from your own records, and migrations that risk double-charging customers.

SaaS companies adding or reworking subscriptions and invoicing.
Marketplaces and platforms that pay out to sellers or providers with Connect.
POS and kiosk products taking in-person payments with Terminal or Tap to Pay.
Teams whose Stripe data no longer matches their own records.

02What we do

Stripe work, end to end.

Stripe PaymentsCheckout, Payment Element and PaymentIntents, including saved cards, 3D Secure and refunds.
Billing and subscriptionsPlans, trials, proration, invoices, dunning and the customer portal.
ConnectMarketplaces and platforms: onboarding connected accounts, payouts and platform fees.
Terminal and Tap to PayIn-person payments, including native Tap to Pay bridges for mobile and kiosk apps.
WebhooksSigned, idempotent webhook handling with retries, so no event is lost or processed twice.
MigrationsMoving to Stripe or between Stripe accounts and integrations without interrupting billing.
Subscription state driftFinding and fixing places where Stripe and your internal records disagree, and stopping it recurring.

03Process

Audit to monitoring, in six steps.

Nothing goes live until every flow has run in Stripe test mode, including the failure cases.

01AuditReview your current integration, data model and Stripe account setup.
02ArchitectureA written design for objects, webhooks, state and failure handling.
03ImplementationBuilt in your codebase, reviewed weekly.
04Testing in test modeEvery flow exercised in Stripe test mode, including failures and webhooks replayed out of order.
05Go-liveA planned cut-over with a rollback path.
06MonitoringAlerts on failed webhooks and payment errors after launch.

04Case study

Stripe Terminal Tap to Pay in a kiosk app.

Megapos Ltd

Stripe Terminal Tap to Pay kiosk

Problem: Megapos, a point-of-sale company, needed in-person card payments inside a kiosk app whose interface is a web app, while Stripe Terminal Tap to Pay runs natively on the device.
What we built: A Flutter WebView kiosk with a Node/Express backend and a native Kotlin bridge to Stripe Terminal Tap to Pay. The PaymentIntent and its client secret pass securely from the web layer to Flutter to Kotlin, so the payment is collected natively without exposing keys in the web app.
Stack: Flutter
Kotlin
Stripe Terminal
Tap to Pay
Node.js
Express

All case studies

05Credentials

Certified people on the team.

Two members of our team hold Stripe professional certifications: Arindam Pradhan (Stripe Certified Professional — Implementation Architect) and Anupam Pradhan (Stripe Certified Professional — Payments Architect).

These are individual certifications held by the people named. Cevrynt, Inc. is not a Stripe partner.

300+: projects delivered
50+: CRM deployments
90,000+: leads a day handled by systems we built
9GB+: production databases
~$800 → $150: monthly cloud costs, cut for a client

Delivered by the team, including work as GreenBorn Infotech.

You work directly with Arindam Pradhan, who has built production software since 2018, and four senior engineers with six or more years each. We work remotely from India with overlap into US and European hours.

06Other services

Payments are one part of the product.

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Book a call

Get your payments right before they scale.

Walk us through the integration you have, or the one you need. We start with an audit and a written architecture, so you see the plan before we build.

Book a callarin@cevrynt.com