Ivo – React, Typescript, Node.js

Development of point-of-sale (POS) kiosk systems and an online ordering platform for a restaurant POS and ERP solution.

• Developed self-service POS kiosk systems;
• Built and maintained the online ordering platform;
• Supported and improved the payment authorization flow to ensure secure and reliable transactions.

Migration of a front-end module from a monolithic Angular.js application to a micro front-end architecture.

• Migrated a module from a monolithic AngularJS application to a micro front-end architecture;
• Took full ownership of the migrated front-end module, including one of the most frequently used pages in the system;
• Ensured stability, performance, and maintainability of the module post-migration;
• Developed and maintained front-end features using React and Angular within a micro front-end environment.

Platform for managing medical clinics and offices, including scheduling, billing, telemedicine, electronic health records, financial management, and system integrations.

• Led the tech team from alpha to production, defining goals, features, and ensuring on-time delivery;
• Architected and engineered the Node.js backend using a microservices approach;
• Implemented MongoDB as the primary database;
• Developed the frontend using Vue.js;
• Delivered a scalable platform for medical clinics with features such as scheduling, billing, telemedicine, and EHR;
• Integrated with external systems, including health insurance providers and government APIs;
• Ensured successful delivery within a two-year timeline, overcoming integration and certification challenges;
• Built a platform now used by 1000+ clients, including clinics, hospitals, and health insurance providers.

Developed and maintained features in a Java and React–based ERP system used by a major health insurance provider in Brazil.

• Led front-end development for the internal control system;
• Developed and maintained back-end services using Java and Node.js, focusing on microservices architecture;
• Designed and integrated RESTful APIs for communication between services and external systems;
• Ensured code quality through code reviews, testing, and adherence to best practices;
• Collaborated directly with clients to gather requirements and deliver tailored solutions.

Contributed to the implementation of a modern Warehouse Management module within a large-scale ERP system serving 2000+ clients across retail and service industries.

• Developed a Warehouse Management module within a large-scale ERP system;
• Implemented backend logic and database operations in COBOL;
• Built RESTful APIs in Java;
• Created a React-based dashboard and configuration interfaces.