I get a few emails a week from prospective faculty to IISc/IIT asking why they were not selected while people with inferior records were selected. I can not answer them because I have no expertise to judge. Further, several factors go into the decision and it might be difficult to say what was favored and what was not favored.
Check the profile of the current faculty in the department and see whether there is a fit. Many engineering departments in IISc may prefer to recruit only people who work on theory or modeling (though they may claim otherwise). In IISc, except for the materials department, nearly 75% of engineering faculty work only on theoretical or modeling/simulation. While there is no prejudice, it becomes easier to judge the quality of a prospective faculty who works on similar lines.
Other factors that go into the selection are the recommendation letters, academic background etc and it is difficult for me to compare and justify any decision. Therefore, I will refer all such emails to this post.