Fintech Development: Super Payment App with Advanced Splitting Functionalities

We are seeking experienced professionals in financial software development to create a comprehensive fintech platform. The objective is to develop a robust web and mobile application system for bill payments, featuring advanced payment splitting functionalities.

Key functionalities required include:
- User registration for both individuals and legal entities.
- Ability to process up to 16 bills per batch.
- Advanced payment splitting, allowing a single bill to be divided among up to 9 different cards.
- Flexible payment options, combining cards, Pix (Brazilian instant payment system), and account balance.
- Support for payment installments.
- Detailed individual transaction history and digital receipts.
- A comprehensive administrative panel for platform management.
- Robust user and permission management system.
- Seamless integration with various financial APIs and payment partners.
- Architectural design prepared for future international expansion.

Technical requirements for the platform include:
- A fully responsive web system.
- Native mobile applications for Android and iOS platforms.
- A scalable and high-performance backend infrastructure.
- A secure and reliable database system.
- Well-documented APIs for all integrations.
- Implementation of advanced anti-fraud controls.
- Full compliance with LGPD (Brazilian General Data Protection Law) and applicable pci dss requirements.

We are looking for a professional partnership for the gradual development of this product. Proposals should include a portfolio of previous financial projects, a breakdown of technologies to be used, an estimated timeframe for development, and a budget per stage. Experience with bank integrations and card payment processing is essential.