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Reddit

Reddit is an online platform utilized by thousands of communities to connect and converse about a wide variety of topics, including TV and movie fan theories, s

Senior Staff Machine Learning Engineer, Ads Ranking

Location

United States

Posted

151 days ago

Salary

$266K - $372.4K / year

Seniority

Senior

Bachelor Degree9 yrs expEnglish

Job Description

Senior Staff Machine Learning Engineer, Ads Ranking

Reddit

• Design and train advanced ML models (e.g., DNNs, transformers) to power Reddit Ads Ranking models. • Develop and optimize features including embeddings, contextual signals, and cross-session behavior. • Own experimentation strategy: offline metrics, A/B design, readouts, and “next iteration” planning. • Work closely with product, infra, and data teams to drive end-to-end model deployment and performance analysis. • Mentor other MLEs and contribute to modeling best practices across the org. • Shape the long-term modeling vision across one or more domains (conversion, app ads, shopping, brand, etc.).

Job Requirements

  • 9+ years industry experience in ML Engineering / Applied ML.
  • Demonstrated impact: leading cross-team technical initiatives and influencing technical direction.
  • Strong fundamentals in ML systems end-to-end.
  • Excellent communication: can explain tradeoffs clearly to both technical and non-technical stakeholders.
  • Proven track record shipping DNN-based ranking/recs/ML models to production with measurable impact.
  • Strong understanding of loss/labeling, sampling, calibration, bias/variance, train/serve skew, and online experimentation.
  • Comfortable mentoring other engineers and raising modeling quality through reviews and technical guidance.

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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