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BNPL App Development: Which programming languages and frameworks are best?

  • November 18, 2025
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davidblair

As BNPL apps deal with sensitive financial information, security is the number one priority. Java Spring boot or ASP.NET core can be considered in terms of highly secure and scalable environment in terms of the backend. Such frameworks provide the security features like authentication, authorization procedures that are essential in the financial applications. Swift (iOS) and Kotlin (Android) are perfect to create secure high-performance native apps in the case of mobile development. Secondly, it is essential to consider embedding powerful encryption libraries and achieve compliance with PCI DSS when processing payments in the BNPL app development, as these should provide protection to the users and make your customers trust you.