Alan Bacon, 21, was shocked to be asked to show his moves to a tune by French duo Daft Punk during the interview process for a job with Currys at a store in Cardiff.
Mr Bacon, a self-confessed "massive nerd", said he would have been in his element working at the shop advising customers on the latest gadgets and had spent a week preparing for the interview.
The firm has launched an investigation and has invited all the candidates back for another interview where they will have a "proper opportunity to demonstrate how they can contribute to our business".
Mr Bacon, who studied documentary film and television at university in Newport, said he had applied for 300 jobs but was attracted to the sales assistant post with Currys because of his interest in gadgets and electronics.
He told BBC Radio 4's PM: "I was extremely pleased to be given the opportunity to work in a place like Currys where I think I'd be in my element.
"I thought fair enough, it's a bit unusual. One of my hobbies happens to be taking pictures of astronomical objects through a telescope so I went out and got those pictures printed off, nice big pictures, and I thought I'll talk them through this."
But when he got to the interview earlier this week, along with nine other applicants "we were taken to a back room and after some short introductions we were asked to dance".
Mr Bacon said: "My heart immediately sank because I knew that all the effort I had put in to trying to learn the brand, what kind of gadgets they were selling ... no, the first thing they asked us to do was to split up into two groups and awkwardly dance with each other for them."
Asked how he felt about being asked to perform to Daft Punk's Around The World, he said:
"Degraded, humiliated, mostly disappointed. But on the surface I really needed the job so I thought I'm going to get this over with, I'm going to smile, I'm going to do it. But inside it wasn't a very pleasant experience.
"There was an older gentleman there who was telling us just before the interview that he was made redundant from his last job and had recently had a child so he was pretty desperate for this job and watching him having to dance to rap music."
Later in the process Mr Bacon did get the chance to talk about his photos of planets "but at that point I had lost all dignity and all sense of professionality".
A few hours after the interview he received a phone call where Currys "let me know that I wouldn't fit in with the team".
A spokeswoman for Currys' owners Dixons Retail said: "We are extremely disappointed that one of the management team at the store in question did not follow our official recruitment processes on this specific occasion - formal processes that ensure we attract, inspire and retain the right sort of people.
"We are investigating the store member who held the recruitment session. We are extremely sorry to those interviewees impacted; all are being asked to attend another interview where they will be given a proper opportunity to demonstrate how they can contribute to our business."