Oscar Casas

Improved, reviewed, and developed high-performance solutions for a widely used monetary application in Venezuela, managing a team of 4 developers and serving as the sole full-stack engineer. Designed and implemented a complete ledger system using PostgreSQL to support the P2P marketplace, and identified and remediated critical security vulnerabilities.

Developed automations to streamline repetitive tasks in employee administration and data management using n8n, IFTTT, and Zapier, alongside integration of services like GitHub, Notion, Pipedrive, and Dialpad. Built microservices, backend services, and frontend applications using React, NextJS, TypeScript/JavaScript, and NestJS, with databases such as MongoDB, Postgres, and Redis.

Developed scalable backend and frontend solutions tailored to restaurant business logic using NodeJS, TypeScript, React Native, and NextJS, with enhancements from TailwindCSS, Firebase, Messaging, Stripe, Redux, and Sync Storage. Led and mentored developers to ensure robust code and optimal performance, and applied security practices including session management, cryptography, and token management

Completed a Full Stack Web Development program covering back-end with Node.js, front-end with React, and foundations in HTML, CSS, and JavaScript.

Completed high school with a focus on accounting and commercial systems, providing a foundation in financial workflows.