This is a very, very common thing amongst Irish people when describing a person, place or thing. Because sometimes we can't articulate how large or small an object is, or the skin tone of an individual or even the heat of a local curry dish - we use this a lot! We basically just say the word twice and the person who gets the info knows exactly what we mean by tone alone.
Used in several different ways. 1. "Job" can be used to describe whether something was sorted out between individuals satifactorily ("job"), 2. whether a job was done well by someone("da job") 3. or whether something looked convincing or not ("da job").