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Stripe Terminal / Tap to Pay: Stripe Terminal and Tap to Pay built into your POS, kiosk or mobile app.

Bring in-person payments into your existing product without separating the device experience from your backend. We connect payment intent creation, native reader or Tap to Pay collection, device state and reliable server-side confirmation.

Plan a Terminal integration See the Megapos implementation

Real POS/kiosk implementation experience · Stripe-certified professionals · Client-owned code

Kiosk payment architecture
  1. 01Node / Express backendCreates the PaymentIntentthen: Client secret
  2. 02Web kiosk UIThe checkout screenthen: Bridge
  3. 03Flutter WebViewPasses it to nativethen: Bridge
  4. 04Kotlin + Stripe TerminalCollects nativelythen: Collect
  5. 05Tap to PayOn the devicethen
  6. 06POS payment stateOrder updatedPaid
Example architecture — Megapos. Not the required architecture for every project.

01The problem

Your payment flow crosses devices, SDKs and backend state.

In-person payments run partly on hardware and native SDKs, partly in your interface and partly on your server. Each boundary is a place for state to drift.

  1. 01

    Web UI, native SDK

    The in-person SDK runs natively while your product's interface may be a web app.

  2. 02

    Mismatched states

    The device, the client and the payment disagree about whether a payment happened.

  3. 03

    Connection and recovery

    Readers disconnect, devices sleep and collections are interrupted mid-payment.

  4. 04

    Double collection

    Retries after a timeout risk charging the same order twice.

  5. 05

    Pairing and capability checks

    Reader pairing, Tap to Pay support and device capability have to be checked, not assumed.

  6. 06

    Refunds, receipts, reconciliation

    In-person payments still need refunds, receipts and a ledger that matches.

02Services

In-person payments across software and hardware.

  • 01

    Stripe Terminal integration

    Reader and device SDK setup, the connection lifecycle and the supported payment collection APIs.

    What you receive

    • SDK setup in your app
    • Connection and reconnection handling
    • Collection flow wired to your checkout
  • 02

    Tap to Pay on compatible devices

    Platform, region, account and device eligibility assessed before development, then mobile SDK bridging as appropriate.

    What you receive

    • Eligibility assessment
    • Supported-device list for your rollout
    • Native bridge where needed
  • 03

    Kiosk and hybrid apps

    A secure message bridge and state synchronization between Flutter, Kotlin or native Android, the web UI and the backend.

    What you receive

    • Bridge between web and native layers
    • One payment state across layers
    • No secret keys in the web app
  • 04

    POS backend integration

    Server-created intents where applicable, purchase mapping, cart and order state, refunds and receipts.

    What you receive

    • Server-side PaymentIntent creation
    • Order and cart mapping
    • Refunds and receipts
  • 05

    Operational reliability

    Timeouts, cancellations, interrupted collections, connection failures, duplicate prevention and reconciliation.

    What you receive

    • Recovery paths for each failure
    • Idempotent retries
    • Reconciliation against orders
  • 06

    Audits and upgrades

    SDK changes, troubleshooting, test-mode validation and go-live support for an existing integration.

    What you receive

    • Findings ranked by risk
    • SDK upgrade plan
    • Go-live support

Already know the devices, the region and the checkout journey? Bring them to a call and we will map the integration.

Plan a Terminal integrationor send your details

03Case study

Megapos Ltd — Stripe Terminal Tap to Pay kiosk.

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

Explore the full case study

04Technical flow

A payment travels through more than one app layer.

The server holds the authoritative payment state. Retries are idempotent, and secret keys never reach the device or the web layer.

In-person payment sequence
  1. 01Customer selects checkoutOrder readyReadythen
  2. 02POS backendCreates the PaymentIntentthen
  3. 03Device layerInvokes the Terminal SDKCollectingthen
  4. 04Card or tapCollected on the reader or phonethen
  5. 05StripeProcesses the resultthen
  6. 06Server-side confirmationEvent confirmed oncethen
  7. 07Order marked paidPOS updatedConfirmed

What we verifyThe order is marked paid only when the server has confirmed the payment, never on the device's word alone.

Illustrative sequence — no customer data.

05Project types

Choose the integration that matches your product.

  • Countertop POS

    A reader at the counter, paired to your POS software, with orders and receipts in your system.

  • Self-service kiosk

    Unattended checkout on a kiosk, where recovery from interrupted payments matters most.

  • Mobile staff checkout

    Staff take payments on a phone or handheld, with Tap to Pay where the device and region support it.

  • Hybrid Flutter/web-native application

    A web or Flutter interface with a native layer for the Terminal SDK, like the Megapos kiosk.

Device, SDK and regional availability must be verified for each deployment. Tap to Pay does not work on every phone or in every country. See the Stripe Terminal documentation.

06Handover

What gets delivered.

  • A hardware, device and account eligibility assessment.
  • The native or WebView architecture, implemented in your repository.
  • PaymentIntent and order state flow, secure auth patterns and failure handling.
  • Test mode, supported-device tests and recovery scenarios.
  • Operational logging, health checks, a go-live runbook and handover notes.
  • Post-launch support on an agreed basis.

Exact deliverables depend on the scope we agree in writing.

07Process

From the shop floor to a live pilot.

  1. 01DiscoveryYour physical workflow, devices and the constraints of where payments happen.
  2. 02Region and device validationSupported countries, devices and SDKs confirmed for your rollout.
  3. 03Written integration designLayers, payment state and failure handling, with a written scope and price.
  4. 04ImplementationBuilt in your repository, reviewed weekly.
  5. 05Hardware and test-mode validationSimulated flows, failure scenarios and tests on compatible hardware.
  6. 06Live pilot and handoverA controlled first deployment, monitoring and handover notes.

08Credentials

Native, mobile and backend payment experience on one team.

Cevrynt, Inc. is a Stripe partner in the Stripe Partner Ecosystem.

The partnership belongs to the company. The certifications below belong to the people named.

View our Stripe Partner Directory profile (opens in a new tab)
  • Stripe Certified Professional — Implementation Architect badge awarded to Arindam Pradhan

    Arindam Pradhan

    Founder, engineering lead

    Stripe Certified Professional — Implementation Architect

    Building production software since 2018: implementation architecture, integrations, webhooks, backend systems and delivery.

  • Stripe Certified Professional — Payments Architect badge awarded to Anupam Pradhan

    Anupam Pradhan

    Stripe Certified Professional — Payments Architect

    Earned 5 August 2026 · valid to 5 August 2028

  • Stripe Certified Professional — Payments Architect badge awarded to Subhadip Giri

    Subhadip Giri

    Full stack developer

    Stripe Certified Professional — Payments Architect

    More than five years of full stack development.

Implemented by an engineering team experienced with native, mobile and backend payment flows.

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. These figures cover the team’s software delivery in general, not Stripe work alone.

Need someone on the team for longer? See Dedicated Engineers. Other Stripe work is on the Stripe Payments page.

09Questions

Stripe Terminal questions, answered first.

The short answer leads. Open any row for the full one, in the same words we would use on the call.

01Can Stripe Terminal work inside a web-based kiosk interface?Yes, with a native bridge

Yes, depending on the architecture, with a secure, supported native SDK or device bridge where one is required. The Megapos kiosk is an example: a web interface with a Flutter WebView and a Kotlin bridge to Stripe Terminal.

02Can you integrate Tap to Pay with Flutter or Android?After a platform review

We first review the supported SDK and platform integration paths, device models and regions. A native bridge may be necessary.

03Do we need a dedicated card reader?It depends on device and region

It depends on Tap to Pay support for your devices and region, and on the flow you want. We review hardware options with you during discovery.

04Can you fix payments stuck in processing or orders marked incorrectly?Yes, from the event trail

Yes. We investigate backend event handling, client and reader states, idempotency and recovery paths, then fix the cause.

05Do you provide hardware?No — software engineering

No. This is a software engineering service. Any hardware sourcing or testing requirements are clarified in the scope; we do not ship hardware.

06How do you test the implementation before launch?Simulated, then on real devices

With Stripe test and simulated flows where supported, explicit failure scenarios, and validation on actual compatible hardware before release.

Still deciding?Plan a Terminal integrationor write toarin@cevrynt.com

10Related services

In-person payments are one part of the product.

FreeGuide · 44 checks · 41-page PDF

Stripe Integration Health Check

The checklist our team runs at the start of a Stripe audit. Use it on your own integration in an afternoon and see where it is likely to fail first.

  • Webhooks8
  • Payments and idempotency6
  • Billing and subscriptions8
  • Connect (platforms and marketplaces)6
  • Terminal and in-person payments5
  • Keys, access and security6
  • Operations and monitoring5

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Book a call

Make payments part of your POS, not a disconnected workflow.

Show us your device, backend and checkout journey. We'll map the integration and provide a written scope.

Plan a Terminal integrationarin@cevrynt.com