Product Management interview prep.

Behavioural questions to expect

1. Walk me through your CV.
2. Tell me about your most impactful product launch — ideally on a marketplace surface.
3. Tell me about a weakness, a failure, or feedback you have worked on.
4. Why marketplace product management — versus consumer-internet PM, enterprise SaaS PM, or pure marketplace ops?
5. Why this mode + product line — rider vs driver vs dispatch vs pricing vs safety vs growth?
6. Why the firm?
7. Walk me through the firm's product, marketplace, and unit economics in your own words.
8. How does product management actually drive value at a ride-share platform?

Technical concepts to master

• Two-sided product design + network effects

  Two-sided design discipline · Liquidity + atomic network · Network effects + the liquidity flywheel · Cross-side cannibalisation + cross-side complement · Real-time + regulatory constraint as design input

• A/B + experimentation rigor — marketplace failure modes

  Two-sided guardrails · Network interference + spillover · Switchback test · Geo-split A/B · Novelty + cohort + selection bias

• Growth loops + supply-demand cohorts + retention

  Liquidity flywheel as the master loop · Rider cohort retention curve · Driver cohort retention curve · Activation as the highest-leverage lever · Demand shaping as a non-financial lever

• Pricing + incentives + unit economics

  Gross bookings + take rate + contribution per trip · Surge / dynamic pricing as a balancing signal · Incentive incrementality + matched control · Two-sided pricing levers + their costs · LTV / CAC per side

Practical drills

• the firm wants to ship a V1 feature that improves rider experience in a mature mode + city without hurting the driver side. Walk through how you would approach it.
• the firm's city dashboard shows: completion rate 87% (down from 91% QoQ), ETA 8 min (up from 6 min), surge multiplier 1.5x (up from 1.2x), supply hours -6% QoQ, rider requests +4% QoQ. Average gross bookings per trip $14, current take rate 25%, current contribution per trip $1.20. Walk through diagnosis + the experiment portfolio + unit-economic math for the first three interventions.
• An A/B you ran on a rider-app feature shows +4% on rider trip frequency (primary) but -2.5% on driver earnings per active hour in the same treatment cells (guardrail). What do you do?

Smart-question anchors

• Marketplace unit economics — disclosed contribution per trip, take-rate posture, growth-vs-profit trajectory
• Two-sided product strategy — rider vs driver investment balance, recent shifts, roadmap shape
• A/B + experimentation culture — switchback infrastructure, two-sided guardrails, network-interference protection
• Product-line shape — rider / driver / dispatch / pricing / safety / growth split, the PM that owns each
• Pricing + incentive posture — surge transparency, incentive efficiency, recent pricing changes

Sourced from

Andrew Chen — The Cold Start Problem + marketplace network effects · Reforge — Marketplaces + Growth + Retention curriculum · Lenny Rachitsky — Marketplace PM + product interview prep · Bill Gurley + a16z — marketplace economics + take rate + liquidity · Exponent + RocketBlocks marketplace + consumer PM interview banks · Major rideshare platform S-1 + earnings disclosures (anonymised) · Amplitude + Statsig — A/B + experimentation rigor for marketplaces