Machine Learning Engineer

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 126 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com.

Introduction

Reddit is a community of communities built on shared interests, passion, and trust. It's home to authentic conversations, with over 100,000 active communities and approximately 126 million daily active unique visitors. Reddit is a major source of information on the internet.

Responsibilities

• Design, build, and deploy industrial-level machine learning models to solve critical problems in ad ranking, bidding, and optimization.
• Take full ownership of the ML lifecycle, from ideation and research to building scalable serving systems and maintaining models in production.
• Perform systematic feature engineering to transform raw, diverse data into high-quality features that drive model performance.
• Work closely with product managers, data scientists, and engineers to translate business challenges into effective ML solutions.
• Improve the reliability and stability of ML systems by building robust monitoring, alerting, and automated retraining pipelines.
• Research new algorithms, stay up-to-date with state-of-the-art ML techniques, and contribute to the team's strategy and roadmap.

Requirements

• Master’s degree in Computer Science, Mathematics, Engineering (any field) or related quantitative discipline.
• Three (3) years of experience in the job offered or a related occupation.

Special Skill Requirements

• Machine Learning
• TensorFlow
• Python and SQL
• Feature Engineering and Selection
• Ads predictive model design
• Ads predictive model offline training and model evaluation
• Ads predictive model online/serving experiment and analysis
• Ads modeling serving status monitoring and incident mitigation (Oncall)
• Distributed Systems
• Prompt Engineering and RAG

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

About Company

Reddit is a community of communities, built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. With over 100,000 active communities and approximately 126 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com.

How to Apply

Submit a resume with references via email to applicationsreview@reddit.com at Req.# 1016.77.3.