Senior Staff Machine Learning Engineer, Ads Ranking jobs in United States
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Reddit, Inc. · 1 day ago

Senior Staff Machine Learning Engineer, Ads Ranking

positionUnited States
timeFull-time
remoteRemote
senioritySenior Level, Lead/Staff
money$266K/yr - $372K/yr
date9+ years exp

Reddit is a community of communities focused on shared interests and authentic conversations. They are seeking a Senior Staff Machine Learning Engineer to enhance their ML-powered ad ranking systems through improved model architectures and contextual embeddings.

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Comp. & Benefits
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H1B Sponsor Likelynote

Responsibilities

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.)

Qualification

Machine Learning EngineeringDNN-based modelsModel deploymentCross-team collaborationTechnical mentoringTechnical guidanceCommunication

Required

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

Company

Reddit, Inc.

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Reddit is the heart of the internet, where millions of people get together to talk about any topic imaginable.
dateFounded in 2005
location
San Francisco, California, USA
people-size1001-5000 employees
web-link
https://www.redditinc.com

H1B Sponsorship

Reddit, Inc. has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (99)
2024 (63)
2023 (76)
2022 (70)
2021 (68)
2020 (39)

Funding

Current Stage
Public Company
Total Funding
$1.33B
Key Investors
FidelityVy CapitalTencent
2024-03-21IPO
2021-08-12Series F· $410M
2021-02-08Series E· $367.95M

Leadership Team

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Steve Huffman
CEO
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Chris Slowe
CTO
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Recent News

Social Media Today
Reddit Launches AI-Powered Max Campaigns
2026-01-08
Social Media Today
Hubspot Publishes New Guide to Reddit Marketing for B2B Brands
2026-01-08
Search Engine Journal
Reddit Introduces Max Campaigns, Its New Automated Campaign Type via @sejournal, @brookeosmundson
2026-01-07
Company data provided by crunchbase