To apply for various posts in ECIL you can refer to the following link:
http://careers.ecil.co.in/login.phpT he application fees for general or OBC candidate is Rs 500 but that of SC/ST/PwD has been exempted.The number of vacancies present are as follows:
Electronics and Communication Engineering – 50 Posts
Computer Science Engineering – 20 Posts
Mechanical Engineering – 14 Posts

While filling the application form you will recent require a passport size photograph of your's with your complete face visible and having a light background with a size not more than 50kb.Along with it , you will need your signature in your running handwriting on a white paper with black pen with a size not more than 20Kb.

If you need any more details regarding this , you can refer to the following link:
https://engineering.careers360.com/articles/ecil-recruitment-through-gate