I went through Vercel's product design interview loop last quarter. I'm a staff-level designer with a background in consulting and I've been through a lot of design interviews at this point. Vercel's was distinct enough that I wanted to document it.
The short version: They care deeply about developer experience as a craft, and your portfolio has to show that you think about technical users, not just consumer flows.
Recruiter screen: Typical 30 minutes. They asked about my experience designing for technical audiences and specifically asked whether I've used Vercel as a developer. I had. That mattered.
Portfolio review round: One hour with two designers on the team. They picked one case study from my portfolio and went deep. And I mean deep. Not "walk me through your process" deep, but "why did you make this specific decision at this specific moment" deep. They pushed on: how did you validate this was the right solution before you built it, what did you learn that changed your original direction, how did engineering constraints shape your final design.
One thing they asked that I haven't heard elsewhere: "Who was excluded from this experience, and what tradeoff did you consciously make?" I found that question genuinely good.
Design exercise: Take-home, given 72 hours. The prompt was vague enough to be a test of how you scope. I won't share the exact prompt but it was in the devtools space. I spent about 6 hours on it. I've seen candidates go 20 hours on Vercel take-homes and I don't think that helps.
Behavioral: Pretty standard, but they care about collaboration with engineers. Half the questions were about working with engineers and how I handle design-eng disagreements.
What I'd tell someone prepping: Your portfolio MUST include at least one technically complex product. Developer tools, internal tooling, data visualization, API design, something where the user is a technical person. If your whole book is consumer apps you'll feel the mismatch. Practice explaining why you cut scope, not just what you shipped. Know their product. Use the dashboard. Have opinions about it.
Offer was competitive for a mid-market design hire in 2026, remote-friendly. I took it.