SERVER SIDE:
ASP.Net framework 4.5 or above
c#
MVC
N-tier architecture / Microservices
WCF
WebAPI / REST-based services
Entity Framework /LINQ / ADO.NET
FRONT-END:
HTML 5
CSS 3 (SCSS/LESS)
Javascript or any of the JS framework or library (Angular, ReactJs)
Bootstrap / Angular material
DATABASE:
SQL Server (preferred) 2012 or above /Oracle / MYSQL