Most of the people in the Nagarro doesn't know difference between UI Developer & UI Designer. They will call you & treat you just like designer. If you are working in project and working hard to delivery great UI, in the end of project, manager will not share any credit with you, they thinks you did just design work and gives all the credits to .Net or Java developers.
HR also will consider you as designer and at time of appraisal they have pre-decided amount for you (designers) even you working good or bad. I think HR doesn't know that you writing HTML, CSS, JavaScript & writing logic in JavaScript.