Mobile app and website for question papers

I am looking for a mobile app and website developer to create a platform for creating and sharing question papers. The platform should be compatible with both iOS and Android devices. I am open to suggestions for the tech stack to be used in the development of the app and website. The primary purpose of the platform is to enable users to create and share question papers. Ideal skills and experience for this job would include expertise in mobile app and website development, as well as knowledge of creating and sharing platforms.