Diagnose a drop in retention
Last updated: October 7, 2025
Quick Overview
The engagement dropped by 15% this week. Walk through your investigation process.
Jane Street
October 7, 202533
5
949 solved
The engagement dropped by 15% this week. Walk through your investigation process.
Jane Street asks this during the Technical Screen to assess your product sense and structured thinking. They want to see how you define the problem, identify the target user, prioritize features, and measure success.
What the Interviewer Expects
- Apply a structured framework for product thinking (user, problem, solution, metrics)
- Segment users and identify differentiated needs
- Prioritize features using a clear framework (RICE, ICE, impact vs effort)
- Define comprehensive success metrics across the user funnel
- Consider competitive dynamics and market positioning
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
- What would you do if usage data contradicts user feedback?
- How would you sequence the rollout across different user segments?
- What competitive response would you expect and how would you prepare?
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Browse Product QuestionsSample Answer
Problem Framing
To diagnose the 15% drop in engagement at Jane Street, we need to first narrow down the scope of the problem. This involves identifying the specific user segments affected, the features they engage wi...
User & Market Context
At Jane Street, our primary users are quantitative traders and institutional investors who rely on our platform for timely insights and trading opportunities. For these users, key aspects of engagemen...
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