Core Focus: Mobile Payment Architecture & Security. Architected and implemented the mission-critical middleware used for communication between POS devices (Bluetooth/SmartPOS) and the payment gateway, processing over 150M+ transactions annually. Engineered the NFC interaction layer enabling standard Android devices to accept contactless payments by communicating directly with the payment kernel. Led the technical implementation of security protocols to achieve rigorous international certifications, ensuring adherence to payment standards across 15+ LATAM countries.

Core Focus: High-Performance UI Development & Custom Controls. Developed complex UI components for the market-leading library for Xamarin Forms (now .NET MAUI), ensuring pixel-perfect implementation across devices. Leveraged SkiaSharp to build high-performance controls rendered directly on the canvas, solving complex visualization challenges beyond standard framework limitations. Delivered tailored mobile solutions for international clients, effectively bridging the gap between design concepts and functional, maintainable code.