Should we build dark mode?
Last updated: May 11, 2026
Quick Overview
Your team is considering building a social feed. How would you evaluate this decision?
Brex
May 11, 202610
5
3,606 solved
Your team is considering building a social feed. How would you evaluate this decision?
This product question from Brex's Onsite goes beyond feature brainstorming. The interviewer expects a framework-driven approach that considers market dynamics, user segmentation, and data-informed decision making.
What the Interviewer Expects
- Demonstrate strategic product thinking beyond feature-level decisions
- Analyze second-order effects and long-term ecosystem impact
- Balance multiple stakeholder needs with clear trade-off rationale
- Design experiments to validate key assumptions before building
- Consider platform effects, network effects, and marketplace dynamics
- Propose a phased rollout strategy with go/no-go criteria
Key Topics to Cover
How to Approach This
- Start with the user. Who are they, what problem do they have, and what is their current workaround?
- Use a prioritization framework: impact vs effort, RICE scoring, or ICE scoring.
- Define success metrics using the AARRR framework: Acquisition, Activation, Retention, Revenue, Referral.
- Consider second-order effects. A feature might boost short-term engagement but hurt long-term retention.
Possible Follow-up Questions
- How would you handle pushback from engineering on feasibility?
- What competitive response would you expect and how would you prepare?
- What would you do if usage data contradicts user feedback?
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Problem Framing
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User & Market Context
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