Why not do an IMC rating first?
It can be done inside a week if you push at it.
I think you may get some training credit from the IF part of your JAR-CPL (the old UK CPL gave IMC rating privileges anyway).
It would also give you a good start to the full IR.
I doubt that the lack of an IR would have much influence on your employability as a rooky FI. The opportunities to do training 'on top' are not that common.