As you have asked about the job for the Junior Research fellow in IIT Madras, I am giving you information about it
I want to tell you that as of now there is no such vacancy in IIT Madras.
However, you can check its website regularly to know about it.
To check it, follow steps given below
Go to IIT Madras website
Click on Jobs in the right side of the screen
The new page open look like




Here click on the required job and you will get the information.

Here I found following:

Post-doctoral researcher positions

Institute post-doctoral positions
Project positions

Notices for project positions
Faculty Positions

Faculty Recruitment