Senior
Own the auction, bidding, and pacing algorithms that power Reddit's ads marketplace
Reddit is hiring an IC3/IC4 Machine Learning Engineer to design and ship the optimization algorithms behind its ad auctions, bidding strategies, and budget pacing. Expect deep discussion of ML systems in production, optimization math, and how you'd translate business goals like ROAS into constrained optimization problems.
走进这场面试
免费 · 一场按这个岗位校准的真语音模拟
这场面试考什么
- Auction & bidding mechanism design
- Budget pacing and spend allocation under constraints
- Translating business objectives (ROAS, CPA, CTR/CVR) into optimization problems
- Production ML system ownership (design through deployment and iteration)
- Scalable data infrastructure (Spark, Kafka, Airflow, BigQuery, Redis)
- Marketplace quality (ad matching, ad load, relevance signals)
常见提问方向
Design a bidding algorithm for a ROAS-based advertiser objective
How would you pace an advertiser's budget smoothly across a day without overspend
Formulate ad load/quality trade-offs as a constrained optimization problem
Walk through an ML system you took from problem formulation to production
How do you validate an auction change didn't hurt user experience
Gradient-based or custom optimization logic you've implemented beyond off-the-shelf tooling
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