An Android payment SDK, delivered in one month.
payabl., an EU-regulated merchant acquirer, had a payment SDK gap holding up merchant onboarding. We designed and shipped it inside a single sprint cycle.
Working with WislaCode Solutions has been a great experience! We needed an Android SDK developed under a tight timeline, and their team delivered a flexible, user-friendly solution that integrated seamlessly into our ecosystem. Their transparent approach, proactive communication, and commitment to quality made the collaboration...
The client needed middleware to reliably connect HioPosCloud with Switchio Pay terminals over the GSA API. The business needs were clear: stable payment acceptance, correct handling of refunds and batch closings, and resilience to network or terminal failures. For end users, payments had to feel instant and smooth, with clear outcomes and few errors at checkout.
WislaCode built an Android middleware app that acts as a transaction bridge between the POS system and the payment terminals. It captures POS actions, translates them into GSA-compliant requests, manages transaction states, and makes sure results return accurately to the POS - even when connectivity is unstable or a transaction has to be retried or reversed.
Result
A reliable payment middleware that improves checkout stability, cuts transaction errors and gives a smooth payment experience for merchants and customers.
We build Android payment middleware and SDKs that integrate cleanly - delivered in weeks, not quarters.
We implemented listeners for Android Intents to capture payment actions initiated by cashiers in HioPosCloud. This ensures that every user action at the checkout directly triggers a controlled and predictable payment flow.
The middleware translates POS requests into GSA-compliant HTTP calls and integrates with Switchio Pay APIs for payments, refunds, reversals, and batch closings, including tip handling. For the business, this provides a single, standardised integration point. For the user, it results in fast and consistent payment processing.
We implemented full lifecycle handling - status polling, result retrieval, and confirmation. This guarantees that transactions are completed correctly, prevents double charges, and ensures that the POS always reflects the actual payment state.
The solution includes configurable communication settings, retries, logging, and fallback mechanisms. This allows merchants to continue operating even during network issues, while providing clear diagnostics and transaction records for support and reconciliation teams.
Android apps and payment SDKs for regulated products - from design and build to release.
See the service SDK integration servicesSDK integration services for iOS, Android and web. We integrate payments, identity, analytics and messaging with CI/CD, versioning and QA - fast, secure and built to scale.
See the service Payment solutions developmentPayment solutions across the transaction flow - acceptance at POS, online and in wallets, PSP and acquirer integration, PCI DSS, settlement and reconciliation.
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