Try it (deployed to Azure) - http://testauthservice.azurewebsites.net/Home/Login
GreenTube test task - implement an ASP.Net Core Auth service with password recovery and simple JS frontend
https://recruiting.novomatic.com/ website with jobs
Intermediate/Senior .Net Fullstack developer vacancy (which I was applying and making test task for) is expired, but here is another similar vacancy https://recruiting.novomatic.com/Vacancies/2083/Description/2
The task was completed in around 6 hours