Growth Marketing interview prep.

What interviewers look for

• Can the candidate think in growth loops (compounding) not funnels (one-shot)? Do they reason about the dominant loop the firm runs and how to deepen it?
• Do they speak unit economics fluently. CAC, blended MER, payback, LTV/CAC, not just headline ROAS? Do they treat platform-reported ROAS as a directional signal post-ATT?
• Can they diagnose the activation funnel end-to-end, install / sign-up → first-session → magic-number behaviour → week-1 retention, and identify the leakiest stage with cohort data?
• Do they think of retention as the foundation that makes acquisition spend pencil, not a separate lifecycle silo?
• Are they creative-volume aware on paid? Do they know modern paid social demands 50-100+ assets per month at scale, and that creative fatigue is the dominant CAC-drift cause?
• Can they design a viral or referral loop with K-factor + cycle-time + payback math, not just 'add a refer-a-friend button'?
• Do they bring the data-science + product + design + brand partnership as core, not work as a paid-buying silo?

Behavioural questions to expect

1. Walk me through your CV.

   What it tests: Story arc and genuine fit for the consumer-internet growth marketing seat. Interviewers want evidence the candidate has owned a loop end-to-end, can speak CAC / payback / blended MER, and has shipped under unit-economic constraint, not just bought media at platform-reported ROAS.

2. Tell me about a project where you owned a measurable growth outcome. CAC, activation, retention, K-factor.

   What it tests: Depth of operator ownership. Tests whether the candidate frames problem → diagnosis → hypothesis → experiment → measurable outcome, not 'we ran a campaign'.

3. Tell me about a weakness, a failure, or feedback you have worked on.

   What it tests: Self-awareness + growth operator discipline. Cross-role canonical. Fake weaknesses downgrade. Growth mistakes carry real CAC + retention cost, interviewers want a real one.

4. Why consumer-internet growth marketing, versus enterprise demand-gen, brand marketing, or product management?

   What it tests: Authentic interest in the consumer growth craft, loop ownership, fast feedback at planet scale, unit economics that compound through retention, A/B-as-religion. Tests whether the candidate WANTS this rather than enterprise demand-gen (long cycle, SQLs, sales-assist) or pure PM (product surface ownership).

5. Why this product type, social vs content vs commerce vs gaming vs utility?

   What it tests: Specificity + grasp of how growth differs across consumer product types. Social has viral / network mechanics; content has SEO + recommendation loops; commerce has paid + transactional repeat; gaming has IAP + retention curves; utility has habit-formation. Tests whether the candidate has a reasoned preference.

6. Why this firm?

   What it tests: Whether the candidate has done the homework. Bar: firm-specific evidence from the product, loop, recent moves, leadership, not generic 'great product'.

7. Walk me through this firm's growth model, dominant loop, and unit economics in your own words.

   What it tests: Whether the candidate has actually used the product, seen the ads, opted into the lifecycle. Tests loop + unit-economic literacy applied to the actual firm, not slide-deck product summary.

8. How does the growth marketing function actually drive value at a consumer-internet firm?

   What it tests: Whether the candidate understands consumer growth economics: the loop they own compounds the user base; the activation they ship determines whether acquisition pays back; the retention they instrument determines whether LTV closes the CAC gap.

Technical concepts to master

Practical drills

• this firm reports: last quarter blended CAC was $14, ARPU per active user $2.40 / month, contribution margin 60% of ARPU, ad spend $2M / month, new activated users 143k / month. This quarter: blended CAC $18, ARPU $2.30, contribution margin 58%, ad spend $2.5M / month, new activated users 139k / month. Walk through the diagnosis + the first three moves.
• this firm wants to add (or deepen) a viral / referral loop. The product is a content-sharing app with 4M MAU, week-4 retention ~22%, and a referral programme currently delivering K-factor ~0.15. Design the V2.
• this firm's week-1 retention has dropped from 28% to 25% over the last 8 weeks. The team suspects the recent onboarding redesign + a paid-source mix shift toward a new short-form-video channel. Build the diagnosis + 90-day recovery plan, including the cohort math for the recovery.

Smart-question anchors

• Growth model + dominant loop, what compounds the user base, where the loop is leakiest, the bet for the next 12 months
• Paid mix + creative engine, channel split, creative volume, in-house studio vs agency, MMM / incrementality maturity
• Activation + onboarding, the magic-number behaviour, the activation funnel rates, the current onboarding bet
• Lifecycle + retention, flow stack, push / email / in-app split, RFM segmentation maturity
• Attribution + data, post-ATT measurement posture, SKAdNetwork operating model, first-party data programme

Related roles

• Community Management
• Design UX
• Engineering IC
• Engineering Management
• Product Management

Sourced from

• Reforge. Growth Series + Retention + Acquisition curricula
• Eric Seufert / Mobile Dev Memo, post-ATT attribution + paid UA realities
• Sean Ellis + Dave McClure. AARRR / pirate funnel + growth canon
• Andrew Chen. Cold Start Problem + viral mechanics
• App store optimization + mobile UA practitioner sources (Adjust, AppsFlyer, AppFollow, Branch)
• Growth interview question banks (Exponent growth track, RocketBlocks, Lenny's Newsletter case studies)