Machine Learning Engineer, Ads Targeting

Los Angeles

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Reddit is a network of more than 100,000 communities where people can dive into anything through experiences built around their interests, hobbies and passions. Reddit users submit, vote and comment on content, stories and discussions about the topics they care about the most. From pets to parenting, there’s a community for everybody on Reddit and with more than 50 million daily active people, it is home to the most open and authentic conversations on the internet. For more information, visit

Reddit is the 4th largest website on the internet, generating billions of events and terabytes of data every day. The Ads Optimization and Modeling team uses those events to generate machine learning systems that supercharge the performance of our ads platform.

We are a team of engineers and data scientists dedicated to using machine learning to improve Reddit’s ads experience. The majority of Reddit’s revenue passes through our systems, and every improvement to our predictions translates into big wins for our business. You’ll own full-stack ML projects from ideation to production to turn data into products that millions of people love.

You’ll use your ads machine learning experience to set long-term ML strategy, charting a path through model architecture, feature generation, and evaluation and experimentation. You’ll own all modeling aspects of our mission critical clickthrough rate and conversion rate models. You’ll help develop an ML roadmap, as well as guide other engineers through executing it.


  • Adapt the ads industry’s machine learning best practices to Reddit’s unique platform and user base.
  • Lead analysis and implementation of features and signals.
  • Write production code to ship your model to millions of users.
  • Participate in the full software development cycle: design, develop, QA, deploy, experiment, and analyze.
  • Collaborate across disciplines to find technical solutions to complex challenges.


  • 5+ years as a Machine Learning Scientist or Machine Learning Engineer, 2+ of which were spent in an Ads Machine Learning context
  • Up to speed on industry best practices in ads machine learning.
  • Strong communication and collaboration skills
  • Software Engineering practices and the ability to write performant production-quality code
  • Comfortable with distributed learning, big data and large-scale systems
  • Master’s or PhD in Statistics, Machine Learning, Mathematics, Computer Science, or related field

Reddit is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If you need assistance or an accommodation due to a disability, please contact us at

* Salary range is an estimate based on our salary survey at

Tags: Big Data Engineering Machine Learning ML PhD Statistics

Perks/benefits: Team events

Region: North America
Country: United States
Job stats:  15  3  0

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