At Digital SAT, I led and built a biometric attendance platform end to end, connecting a PHP REST API, a Flutter Android kiosk app, and an embeddable React/TypeScript component. Attendance checks use AWS Face Liveness and face matching, and the platform serves as the identity service for three systems.
I delivered 28 tickets for a payroll module in a multi-company ERP, replacing a legacy VB.NET system and implementing Costa Rican labor rules. I also contributed to a sales and compliance platform rewrite, including security fixes for cross-company data leaks and privilege escalations.
I built a delivery-management module that replaced a manual WhatsApp and Excel process, reducing lost or mismanaged orders from 60% to under 2% of sales and more than doubling weekly delivery throughput. I also integrated Amazon Textract into a PHP API to automate SIM inventory validation.
As co-founder of Tico Flow Solutions, I built React and Node.js applications that replaced manual Excel processes, including a supermarket inventory system that eliminated monthly inventory losses. Earlier, as a Web Developer Intern at ParallelDevs, I maintained Drupal sites and helped build a hospital and veterinary directory.
