Programming. This is an essential skill. It can be atleast two languages from Java, C++, Python.

SQL – must be proficient in using SQL. Also look into variants such as NoSQL

Cloud Computing – Cloud is where the data is so it is essential to learn about technologies related to cloud computing, especially Amazon and Google cloud products

Mobile computing basics – Most applications are shifting to the mobile platform and hence one must be familiar with mobile app development, protocols, HTML5.

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