Essential skills or courses needed for an computer engineer for his career

I think it all boils down to one thing - Passion. If you're passionate about programming, you'll be very successful.

From job perspective; all you should have is thorough knowledge of your engineering subjects; not the theory only, but practical knowledge helps. In order to get a job, you'll have to crack aptitude tests; so basic problem solving skill is very necessary. Plus, if a candidate is not fluent in English; it helps a lot to practice English speaking skills and overall communication skills.

You may opt for any course of your choice & interest.