We needed to build an application that manages visitor's access to an organization and be secured as much as possible. my team and I ensured a blacklisted guest using either phone number or email, doesn't have access to the company again on sign-in, my team and I also ensure the user knows the person they are coming to see as dropdowns weren't allowed at key areas. My team and I also ensure a user can be preregistered and he can come to the reception of a company to register. This helps them avoid time wastage when they get to the company. Personal belongings were also cater for to avoid theft. Also, we had a service that handles the authentication, it was built using IdentityServer4. When the user signs-in, they're redirected to the application they're coming from. Also, the admin of a company could import all users from their Azure account to the system with a button click. I implemented this using the azure ad integration (Microsoft.Graph). I built it quick in like 8 months while still maintaining the system till I left the organization.
It was built using ASP.NET Core for the REST/RESTful APIs, Angular for the front-end, NUnit for the Unit Test and SQL (when needed). For this application, it was a microservice architecture with the payments platform built using same technologies. It's to be noted that I made use of Git also.
