2nd Bach: er & ee

Employer &  employee  ( empleador & empleado) 

      A chance for flexibility is important for both employer and employee

Trainer & trainee ( instructor/ profesor & estudiante)

     Feedback is provided during the class between the trainee and the trainer, supervisor or college tutor. 

Interviewer & interviewee ( entrevistador & entrevistado) 

Interviewer : A person who interviews someone, especially as a job. In other words the person who takes the interview of somebody. Interviewee: A person who is interviewed. in other words the person who gives an interview

If you want to learn more words click    https://www.thefreedictionary.com/words-that-end-in-ee