Any testing company prefer the candidates those can work on different technologies and platforms in the field of automation, It can be either designing of automation frameworks, working on UI, functional, API or Performance testing.
For API testing multiple tools like REST-assured, SoapUI, Postman and JMeter are available, and we can use them by considering ...
Don't focus too much on tooling.
Tools will go out of fashion. Perhaps not this year, not in 2 years, but definitely a few times during your career life (provided you are not at the end of it, but have, say, 5+ year ahead).
Here are some points along which you might want to explore:
what an API is and what we're trying to achieve with it
what problems web ...