Reddit is hiring a Senior Staff Machine Learning Engineer to join our Ads Ranking organization. In this role, you will enhance our ML-powered ad ranking systems through improved model architectures, contextual embeddings, and conversion-optimized modeling.
What You'll Do
- Design and train advanced ML models such as DNNs and 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, infrastructure, and data teams to drive end-to-end model deployment and performance analysis.
- Mentor other Machine Learning Engineers and contribute to modeling best practices across the organization.
- Shape the long-term modeling vision across one or more domains like conversion, app ads, shopping, and brand ads.
What We're Looking For
- 9+ years of industry experience in Machine Learning Engineering or Applied ML.
- Demonstrated impact leading cross-team technical initiatives and influencing technical direction.
- Strong fundamentals in ML systems end-to-end.
- Excellent communication skills with the ability to explain tradeoffs clearly to both technical and non-technical stakeholders.
- Proven track record shipping DNN-based ranking, recommendation, or ML models to production with measurable impact.
- Strong understanding of loss/labeling, sampling, calibration, bias/variance, train/serve skew, and online experimentation.
- Comfort mentoring other engineers and raising modeling quality through reviews and technical guidance.
Team & Environment
This role is part of Reddit's Ads Ranking organization.
Benefits & Compensation
- Compensation range: $266,000 — $372,400 USD + equity in the form of restricted stock units.
- 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 and Gender-Affirming Care.
- Mental Health & Coaching Benefits.
- Flexible Vacation & Paid Volunteer Time Off.
- Generous Paid Parental Leave.
Work Mode
This is a remote position open to candidates located in the United States.
Reddit is proud to be an equal opportunity employer and is committed to building a workforce representative of the diverse communities we serve. Reddit is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures.
