Must have for a back-end engineer

This is a partial list, I will keep updating it as I find

.NET background

C#
.Net Core
Web Api
Unit Test Framework (nUnit/xUnit)
SQL Server, CRUD operation
Cloud (Azure/Openshift/AWS/other cloud tech), if have hosting experience in one of these that’s fine
Microservices :- Good to have
Apache Kafka/Rabbit MQ or other message broker :- Good to have
DevOps (Azure DevOps/Jenkins/Bamboo/Octopus/any other CI/CD tools) and Unit-test integration in CI/CD pipeline :- Good to have