In 1998 I launched www.bibliaonline.com.br. It currently has reached ~300k visits per day.
I manage this project on my own, being responsible for infrastructure, development and marketing. It's an isomorphic React+Redux application on the frontend, Finagle+Solr for search engine, Docker+Terraform for provisioning on AWS, and Google App Engine for users data and login backend. It also has an Android native app written using Kotlin.