Senior SWE building the ranking/pricing and user-value layer behind Google Discover Ads

This is a Senior Software Engineer role on Google Ads' Discover Ads team, owning the auction (ranking/pricing), inventory, and user-value logic that decides how many ads to show Discover feed users and how to price them. Expect a mix of core Google SWE loop (coding, data structures & algorithms, system design) plus questions probing product sense around ads ranking, A/B testing, and balancing advertiser, user, and Google value. Good fit for engineers who can talk through experimentation and information-retrieval/ranking systems, not just raw coding.

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Likely format

Google's standard SWE loop: phone screen(s) with coding, followed by an onsite/virtual onsite of 4-5 rounds mixing coding (DS&A), system design, and Googleyness/leadership behavioral, with role-specific ads/ranking system design likely for this team.

What this interview tests

Coding: data structures & algorithms
Large-scale system design (info retrieval, ranking/recommendation systems)
A/B testing and hypothesis validation methodology
Ads auction concepts: ranking and pricing tradeoffs
Data analysis / product thinking for balancing user, advertiser, and platform value
Code review and engineering best practices