Our institute has an open position for a student research assistant where it is hard to find qualified applicants. Currently, I'm supervising a very good student who is in the final weeks of writing down his bachelor's thesis. He has experience with the requirements of the position and I would love to have him as an assistant.
The position would start after he finishes his degree.
However, I'm worried that if I were to offer him the position now, it would put him under undue pressure to accept, since his thesis will also partly be graded by me. Is this a problem?
Edit: Thanks for all your thoughtful input and answers! The thesis will be submitted in about a month, my part of grading it will finish a week after. While the professor could veto a application, I am effectively solely responsible for deciding who to hire as research assistant.