Design a Product From Scratch
Part of the Product Management Roadmap
In short
"Design an app for elderly people living alone." The interviewer doesn't care much about your final idea. They're watching how you think your way there.
A classic prompt like 'design an app for X' testing structured thinking under ambiguity — the interviewer cares far more about your process than your final idea.
Think of it like this
Cooking for a guest you've never met
Before cooking for a stranger, a good host asks: veg or non-veg, any allergies, how spicy, lunch or dinner? Only then does she plan the menu. Jumping straight to biryani might mean serving it to someone who can't eat rice.
Watch it happen
A structure for any "design X" question
1/6Ask a couple of questions: what's the goal, any platform or market limits? Then state your assumptions out loud.
The big ideas
What you need to know
Clarify, briefly
A few sharp questions show care. Ten questions look like stalling.
Pick one user
Choosing a focused segment, and saying why, is what separates strong answers.
Think out loud
Narrate your reasoning so the interviewer can follow and nudge you.
Land it
Finish with a recap: user, problem, solution, metric. Don't trail off.
Save yourself the pain
Common mistakes
Oops
Jumping straight to features in the first minute.
Do this instead
Spend the first few minutes on goal, users and pain points. Solutions come after.
Oops
Trying to solve for every user at once.
Do this instead
Pick one segment and go deep. You can mention others as future work.
Your mission
Practise one design question
Quick check
In a product design interview, what should you do right after clarifying the question?
Go deeper
- 1Practice a repeatable structure: clarify the goal, pick a user, identify their problem, brainstorm, prioritize, define success.
- 2Time yourself — most of these need to fit in 15-20 minutes including discussion.
- 3Practice out loud with another person, not just in your head.
More product sense at this stop
Improve an Existing Product
Favorite Product Critique
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