Make a single page website and iOS and Android app for observation skills tests.

I am looking for a freelancer (UI Developer) who can create a single page website and iOS and Android app for observation skills tests. The primary purpose of this project is for personal work. The website and app should include user accounts and customizable tests. The design style that I prefer is minimalistic. Ideal skills and experience for this job include proficiency in web and mobile app DEVELOPMENT, UI/UX design, and familiarity with observation skills tests. Thank you for considering this project. (i am not looking designer)