Cristian Sotomayor

Built two full production React Native apps using Expo and TypeScript for a U.S.-based on-demand laundry and dry-cleaning platform.

Consumer app: implemented order management, user authentication, profile flows, schedule generation, and Stripe payment integration — handling complex UI logic across Android and iOS.

Driver app: built real-time GPS tracking for laundry pickup drivers with live route management and status updates.

Integrated Firebase for push notifications and as a backend service layer across both applications. Managed full App Store and Google Play submission cycles using EAS Builds.

Worked closely with U.S.-based product and design teams in an async remote environment, owning features end-to-end from technical planning through production deployment.

MGM Resorts one of the most famous group of casinos and hotels located mainly in Las Vegas. I worked like a senior frontend developer in charge of a big migration of his resources in the frontend like his own UI library and maintaining of a micro-frontend app.

· Maintained a complex web platform built with React, Nextjs and micro-frontend architecture exploring the exhaustive use of this pattern and how to maintain it to scale a product to thousands of concurrently users. (Superformula – MGM Resorts)

· Developed a robust and accessible design system using storybook, jest, cypress, styled components and using the top standards of the industry to create interfaces which can be used without problems by most of the world's population. (Superformula – MGM Resorts)

· Participated in the re-establishment and implementation of world-leading security protocols during a data breach from the frontend side. Understood the implications of making granular, testable, and secure releases that meet the needs of the business in times of tension. (Superformula – MGM Resorts)

· Contributed to a shared React Native UI component library as part of the enterprise Design System, ensuring visual consistency and accessibility standards across mobile platforms.

Worked for a large company MGM Resorts

· Maintained a complex web platform built with React, Nextjs and micro-frontend architecture exploring the exhaustive use of this pattern and how to maintain it to scale a product to thousands of concurrently users.

· Developed a robust and accessible design system using storybook, jest, cypress, styled components and using the top standards of the industry to create interfaces which can be used without problems by most of the world's population

· Participated in the re-establishment and implementation of world-leading security protocols during a data breach from the frontend side. Understood the implications of making granular, testable, and secure releases that meet the needs of the business in times of tension.