A product designer is hired on judgment, not decoration. Screen for one case study where the candidate framed an ambiguous problem, cut scope deliberately, and can say what changed for users after launch. Then run a live scoping session, a craft critique with a senior designer, and a working conversation with the engineers who would build it.
The dependable pool is people who have shipped inside a product team, not agency portfolios stacked with concept work. Look at designers currently sitting one company stage ahead of yours, because they have already survived the constraints you are about to hand over. Personal portfolio sites and Figma community files surface craft; conference talks, product teardowns and design writing surface thinking. Referrals from your own engineers and product managers are unusually accurate for this title, since the people who sat in stand-ups know whether the work actually shipped or quietly stalled. Contract-to-hire also suits the role well: a short paid project reveals more about how someone handles a half-defined brief than any panel ever will.
State the surface they will own and the decisions they get to make. Product designers self-select on autonomy, so "own onboarding from problem definition through shipped iteration" pulls stronger applicants than a list of software requirements. Name the partners: how many engineers, which product manager, whether research and content support exist or whether they are doing that themselves. Be honest about where design maturity sits today, because someone walking into a founder-driven product wants that fact before offer stage, not after. Drop the tool checklist entirely; nobody strong picks an employer based on which software the team licenses. Describe two problems waiting on their desk in month one, in plain language. Keep requirements short and outcome-shaped, and build the posting from the [product designer job description template](/job-descriptions/product-designer) instead of recycling a visual-design advertisement.
Ask for one case study plus a fifteen-minute walkthrough, live or recorded. That single artifact answers nearly everything: how the problem got framed, what evidence drove the direction, which options were rejected, and what happened after release. Push hard on ownership, because portfolio narratives quietly absorb the whole team's contribution. The most useful follow-up is "what did you decide not to build, and who disagreed?" Sprawling unpaid exercises mostly filter for who has free evenings, so remove them from the process and reclaim the calendar time for a second conversation with your shortlist. When applications spike, structured application questions plus [AI resume screening](/resume-screening-software) keep the funnel moving, and a shared bank of [product designer interview questions](/interview-questions/product-designer) stops each panelist inventing their own bar.
Four conversations is usually plenty. Open with the case-study deep dive, then a live scoping session where you hand over a genuinely vague request and watch them ask questions, name assumptions and sketch two directions rather than one. Add a craft critique with your most senior designer, aimed at interaction detail, state coverage and accessibility instead of visual taste. Close with a partner conversation: an engineer and a product manager together, arguing through a real trade-off from your roadmap. Hold the whole loop inside two weeks, because strong candidates run several processes at once. Coordination matters more than people expect, and [interview scheduling software](/interview-scheduling-software) removes most of the calendar drag that loses people mid-process.
Plan for a longer search than a generalist design opening, since you are filtering for product judgment on top of craft and most candidates worth hiring are employed and only casually looking. Pay matters, but the deciding factors are usually elsewhere: how much of the problem they own, whether design gets direct access to users, and how frequently the team actually ships. Show them the roadmap and one recent decision where design changed the outcome. Move between stages quickly and give feedback the same week you gather it. Silent, slow processes lose exactly the people you were trying to attract, and the loss is invisible until a competing offer lands.
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