>It would be a red flag if you were interviewing for react and decided to bring up vue or svelte or angular or whatever else as well.
...why?
Seriously, why on earth? I don't follow this train of thought at all; if they demonstrate proficiency within the scope of the position, why does it matter if they also happen to know other technologies?
"Oh, Alice? Yeah, she was a great candidate, unfortunately she also had experience in Vue, so there's nothing we could do. We decided to hire Bob, who has 3 years less experience with React, but fortunately that's the only stack he's ever heard of."
If anything, it's a sign the person is interested in learning, most great devs I've met were not proficient only with a single technology. This sounds completely alien to me.
...why?
Seriously, why on earth? I don't follow this train of thought at all; if they demonstrate proficiency within the scope of the position, why does it matter if they also happen to know other technologies?
"Oh, Alice? Yeah, she was a great candidate, unfortunately she also had experience in Vue, so there's nothing we could do. We decided to hire Bob, who has 3 years less experience with React, but fortunately that's the only stack he's ever heard of."
If anything, it's a sign the person is interested in learning, most great devs I've met were not proficient only with a single technology. This sounds completely alien to me.