15 minutes, report the moment they finish
Design engineer skills assessment
Twelve written situations, about fifteen minutes, for the role between design and engineering: when a component should exist, which quality lines are worth holding, and how to ship without stopping the release.
The gap
What you can’t see when you hire a design engineer
A GitHub profile shows what they merged. It never shows what they talked the team out of.
The case starts here
A product designer: “Just add a variant to the button component, it's a one-line change.”
Every case opens with a request that already contains its own answer, because that’s how requests arrive at work. What we measure starts with whether they notice.
What this case shows you
- When a component is new, a variant, or shouldn't exist
- How they trade off system consistency against shipping
- What they do with a design that ignores the system
- How they explain a technical constraint to a designer
- What debt they take on knowingly, and why
The kind of call they make
Situations a design engineer runs into
Twelve short situations like this one, drawn from the day-to-day work of the role. The live situations are confidential, because an assessment you can rehearse stops measuring anything.
Example situation
A product designer asks you to add a variant to the button component. It's a one-line change, they say. Looking at it, the variant differs from an existing one only in border radius, and the release is on Thursday.
What you get
A recommendation for your design engineer role
You mark what this particular job can’t do without. The report opens with a clear call for that job, shows where the candidate stands on each capability you chose, and gives you three questions to ask in the interview.
Marta R. · Design Engineer
Leads with both of the things you named
Reaches first for knows what is cheap to build, with the rest close behind.
Why these matter for a design engineer
- Knows what is cheap to build
- In this role it runs in both directions: what a variant costs to add today, and what it costs the system to carry for two years. Someone who only prices the first is how a design system ends up with nine buttons.
- Sweats states and edge cases
- For shared components the stakes multiply. A missing focus state in one screen is a bug; in a component used in forty places it's forty bugs, and they are found by users rather than by QA.
- Explains decisions outside the team
- Translating a technical constraint to a designer, and a design constraint to an engineer, without either side feeling overruled. Nobody in the company is better placed to do it and nobody else will.
Against what you already do
What each format sees, and what it misses
| Format | What it shows you | What it misses |
|---|---|---|
| GitHub or component-library review | Code quality, API design, and how they think about composition. For this role it's strong evidence and deserves the time. | What they refused to merge. A design system is defined as much by the variants that were talked out of existence as by the ones that shipped, and a repository only records the second kind. |
| Portfolio review | Visual judgment and the polish they hold themselves to. | The negotiation. This role lives between two teams that both think they own the decision, and a portfolio has no record of how those conversations went. |
| Take-home component build | Craft at the level the role actually needs: accessibility, states, motion, API surface. | Whether the component should have existed. The brief tells them to build it, which removes the single most valuable decision in the job. |
| This assessment | When a component is new, a variant or shouldn't exist, which quality lines to hold, and what debt they take on knowingly. Twelve identical situations, read against your role. | Whether they can build it well. Pair this with a look at their code; together they give you the whole picture for this role. |
How it works
Three steps,
with no calls and no setup
What must they be good at?
- Spots when the brief is wrong
- Knows what the data supports
- Moves without being told
- Sweats states and edge cases
One credit per candidate, spent only when they start. The first is free (see what the packs cost), and nothing expires, so a role on hold costs nothing.
Questions
Assessing design engineers, in practice
The role that sits between design and engineering: owns the component layer, decides what belongs in the system, and holds the quality line on states, accessibility and motion. Titles vary (UI engineer, design technologist, front-end designer) and the assessment fits any of them.
Both measure judgment rather than code, but on different decisions. The front-end assessment is about shipping a feature against a moving date. This one is about the system: when a component should exist, which rules to defend, and what debt to accept knowingly.
No. It's written situations. Keeping code out is what makes the answers comparable across candidates, and the decisions in this role are the part a code review can't see anyway.
About fifteen minutes, on any device, whenever suits them, with the report reaching you the moment they finish.
No. You describe what the role can't do without first. A design engineer assessed for a team with a mature system and for one building the first version get different recommendations from the same answers.
One credit per candidate, spent only when they start. The first candidate is free with no card, and credits don't expire.
Related reading
Read these before you decide
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How to hire a product manager
Hiring a product manager well comes down to what they refuse rather than what they shipped: whether they interrogate a request instead of writing the ticket, how they size an opportunity with incomplete data, what they say no to and how, what goes first when the deadline halves, and which single metric they'd move and by how much. A roadmap shows the output of a hundred decisions and none of the decisions.
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Product manager interview questions worth asking
A question discriminates when a strong and a weak candidate give visibly different answers to it. Most standard product manager questions fail that test because the good answer is public and can be rehearsed. The ones that work put the candidate in a situation with no correct option (a request that contains its own answer, a stakeholder who won't move, a deadline that halves) and read what they reach for first.
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The PM case study interview: what it measures and what it misses
A product case interview measures structured thinking, communication under mild pressure and comfort with ambiguity. It doesn't measure what someone refuses, what they kill, how they behave when a plan breaks, or how they hold a position with an executive. Run as a take-home, it also ranks how much unpaid time a candidate had available that week.
Read it