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Machine Learning Engineer, Ads Optimization

reddit· 59 open roles

Remote RemoteFull-timeToday
Salary
$216,700 - $303,400
Experience
Mid
Job Type
Full-time
Posted
Today
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About This RoleAI processing…

Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 130 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com . Team Description This role sits in the Ads Optimization organizations, which are responsible for the health and performance of Reddit’s ads marke

Key Responsibilities

  • 1
    Design and implement optimization algorithms for auctions, bidding strategies, and pacing that balance advertiser performance, user experience, and marketplace efficiency.
  • 2
    Own systems end-to-end: from problem formulation and algorithm design to experimentation, production deployment, and ongoing iteration.
  • 3
    Work across Ads Optimization (bid strategies, budget optimization, pacing) to deliver measurable wins for advertisers and Redditors.
  • 4
    IC4 MLEs lead more complex or multi-quarter initiatives, set technical direction for key parts of the bidding/auction/pacing stack, and mentor other engineers while remaining hands-on.

Requirements

  • 3–5+ years 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.
  • Experience with advertising/auction systems , online marketplaces, or search/ranking systems at scale, particularly in:
  • Bidding, pacing, or budget optimization
  • Auction design, mechanism design, or marketplace quality
  • Campaign performance optimization (e.g., CTR/CVR, CPA, ROAS)

Perks & Benefits

Comprehensive Healthcare Benefits and Income Replacement Programs
401k with Employer Match
Global Benefit programs that fit your lifestyle, from workspace to professional development to caregiving support
Family Planning Support
Gender-Affirming Care
Mental Health & Coaching Benefits
Flexible Vacation & Paid Volunteer Time Off
Generous Paid Parental Leave

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