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 a middleware solution that would reliably connect HioPosCloud with Switchio Pay terminals via the GSA API. From a business perspective, the key requirements were 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 seamless, with clear outcomes and minimal errors at checkout.
WislaCode delivered an Android middleware application that acts as a transaction bridge between the POS system and payment terminals. It captures POS actions, translates them into GSA-compliant requests, manages transaction states, and guarantees that results are accurately returned to the POS - even if connectivity is unstable or a transaction needs to be retried or reversed.
Result
A reliable payment middleware that improves checkout stability, reduces transaction errors, and ensures a smooth payment experience for both 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.
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