• Developed a NodeJs and Apache Kafka web service to update supermarket prices efficiently, reducing update time from 6 hours to 20 minutes. • Enhanced React Native application, decreasing supermarket checkout time from 8 to 4 minutes per customer. • Spearheaded the development of a Queue System web app with Node.js & React, cutting customer waiting time from 10 to 6 minutes. • Frontend development of a React-based web app, halving the time required for vehicle inventory management at Pandero. • Implemented improvements in debt and payment system microservices, increasing customer satisfaction by 30% at Pandero.