Startup - Web Developmet - Angular 10 + Spring Boot Frame Work

We are looking for a complete web development for a start up, we have complete prototype about the project. We are looking for someone who is well experienced in Angular 10 + Spring Boot Frame Work for developing our project. Development should be adoptable for andriod & ios app in future. Kindly share your recent portfolio, will explain the process flow in details through prototype. Find the attached file for more in details. Looking for detailed technical documentation along with estimated time before proceeding with the project. Thanks.