Original link: Stack Overflow: The Architecture - 2016 Edition / Nick Craver blog.
Surprisingly few servers for one of the worlds most known web sites.
Showing that sometimes monolith is way more efficient than micro-services.
Fundamentally it is an MS shop. Both web servers and app servers are ASP.NET on Windows, and database servers are SQLServer on Windows. Using Dapper as ORM.
But they also use HAproxy on CentOS, Redis on CentOS and ElasticSearch on Java/CentOS.