As a multi-skilled engineer with vast experience in both mobile app development and website design, I'd like to offer my services for your cross-platform app project. Over the years, I've honed my skills in Java, Python, Php, Golang, Node.js, and several popular frameworks to build dynamic and efficient backend systems. Simultaneously, I have extensively worked on React, Vue, Angular, JQuery, TailwindCSS, LESS/SASS, Bootstrap +easing a seamless front-end development.
Moreover, as security is a critical aspect of your project which requires Multi-factor Authentication using Microsoft Authenticator; I can assure you the highest level of commitment towards ensuring user data are safe. I have solid experience in implementing secure systems using blockchain technologies that can be leveraged to enhance the security of this system. My versatility in various cloud environments (AWS, GCP, Azure) will be an additional advantage in scaling your application efficiently.
In essence, my deep understanding and proficiency with cross-platform app development tools alongside my emphasis on security make me the perfect candidate for this multifaceted project. As a seasoned developer who has successfully launched multiple apps on both Apple App Store and Google Play Store; I will ensure the timely delivery of a sleek and minimalist app that satisfies all your requirements while leaving room for future expansion.