Tomaz Cuber Guimarães Email & Phone Number

São Paulo, Brasil

- Created, tested, and upheld a payment application for Android SmartPOSterminals in compliance with EMV and ISO8583 Standards, utilizing Java andKotlin.- Designed, developed, tested, and maintained a Telemetry system to gathersignificant metrics from SmartPOS payment applications and transmit them to aservice hosted on Azure through the gRPC framework.- Refactored a payment application initially for a specific Android SmartPOSterminal to accommodate various devices from diverse manufacturersemploying Gradle compilation tools.- Spearheaded the development lifecycle of a new payment application fromtechnical assessment to EMV certification on a new device, ensuring adherenceto industry standards and best practices.- Enhanced and sustained a legacy payment application for Linux POS terminalsby incorporating new functionalities using C++, mainly integration with theinstant payment service Pix.

Development of a cloud-based embedded payment application for Point of Sale Terminals using C++ 17. Activities:- Refactoring of a single-platform legacy library for payment processing on the AWS Cloud according to the EMV Standard to a multi-platform solution;- Development of embedded Graphical Interfaces with LVGL;- Maintenance of CI/CD pipelines using Jenkins;- Application maintenance and debugging;- Developer role on an Agile Team using the Scrum framework.