Hiring: Senior Machine Learning Engineer, Ads Optimization Company: Reddit, Inc. Location: San Francisco, CA Job Posted Time: 2026-09-02 18:05:23 Target Skills & Keywords : Airflow, BigQuery, Go, Java, Kafka, Machine Learning, PATs, Python, Redis, Rust, Segment, Spark About the job Experience: •5+ years of experience building, deploying, and operating machine learning systems in production (for IC4, typically 5+ years). Required Skills: •Auction, Bidding, and Pacing Systems •Design and implement models and policies that: •Compute bids for different optimization objectives (e.g., CPC, CPA, ROAS-based strategies). •Pace budgets smoothly over time across accounts, campaigns, and ad groups while preventing overspend or underspend. •Allocate spend and auction participation intelligently across segments, surfaces, and time zones. •Translate product and marketplace goals into concrete optimization problems and constraints (e.g., ROI, revenue, delivery smoothness, fairness, and user experience). Qualifications: •(Level will be determined during the interview process; IC4 expectations assume deeper experience and broader scope.) •of experience building, deploying, and operating machine learning systems in production (for IC4, typically 5+ years). •Strong programming skills in Python, Java, Go, or similar languages, with solid software engineering fundamentals. •Experience designing scalable data processing systems (e.g., Spark, Kafka, Airflow, BigQuery, Redis). •Demonstrated ability to translate ambiguous product or business problems into solutions and to improve measurable metrics. •Additional expectations for strong bidding/auction candidates: •Evidence of stronger math and optimization skills than a generic MLE, such as: •Degree or equivalent background in a quantitative field (math, physics, quantitative finance, economics, op Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!