1. No, but it helps to know their industry. It really sets you apart.
2. All things backend using what technologies? (language, databses, frameworks etc)
2. All things backend using what technologies? (language, databses, frameworks etc)
Languages: Java, Scala, Python 2&3, Javascript/ES6/Typescript
Libraries/Frameworks/Middleware: Spring, Java EE, Spark, Flask, Pandas, Pyspark, Node, Kafka, Redis, Memcached
Databases: The popular SQL dbs (SQL Server, Oracle, Postgres, MySQL) and NoSQL (Cassandra and Mongo).
I also have alot of experience with Azure and AWS offerings, including serverless.