Machine Learning Engineer - MoPub

San Francisco, CA

Who We Are:

MoPub is the world’s largest mobile application advertising exchange and complete ad serving platform. From individual developers to the largest names in mobile apps and games, MoPub’s customers span the globe with over 30 billion ad requests/day. We build features that help make our infrastructure more efficient and scalable to handle growing traffic on the platform.

What You’ll Do:

As a part of MoPub’s Data team, you will join a small and passionate engineering team working on our MoPub data pipeline, machine learning models, and various systems that use data to make better decisions for our customers. You will work closely with data scientists, product managers, data analysts and software engineers to design, develop, measure and ship new data driven features that generate significant new revenue for MoPub.

Example Projects:

  • Improve MoPub auction dynamics to help maximize publisher value while providing highly valuable solutions to advertisers.
  • Design models, extract features and run experiments to improve the efficiency of matching ad requests with auction participants.
  • Build systems and design metrics to A/B test new features and measure product impact.

Who You Are:

  • You want to learn how the world’s leading Ad Exchange works
  • You seek complex problems, learn quickly, and persist towards optimal solutions
  • You understand core Computer Science concepts such as common data structures and algorithms
  • You have experience at scale


  • Experience building models, engineering features, and using data intelligently to optimize product performance.
  • Experience with Hadoop or other MapReduce-based architectures
  • Experience analyzing large data volumes (10-100s of TBs) in a modern distributed systems environment
  • Ability to thrive in an unstructured environment, working autonomously on a strong team to find opportunity and deliver business impact
  • Deep understanding of (one or more of the following): C++, Java, or Scala, plus experience with Python, or R
Bonus Points:
  • Past experience in adtech
  • Experience in production stacks involving machine learning, AB testing, or control systems
  • PhD or MS in computer science, machine learning, or statistics
  • Active contributor to a well-known open source project
  • Interesting side projects or Kaggle competition results
  • Entrepreneurial mindset

We are committed to an inclusive and diverse Twitter. Twitter is an equal opportunity employer. We do not discriminate based on race, ethnicity, color, ancestry, national origin, religion, sex, sexual orientation, gender identity, age, disability, veteran, genetic information, marital status or any other legally protected status.

San Francisco applicants: Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

Hiring Process

Step 1

After you apply, a recruiter may reach out to you for an introductory call.

Step 2

If your background is a match for the role, you may phone interview with 1-2 people.

Step 3

If you continue through the process, you will come onsite 1-2 times to interview with a total of 5-10 people.


Personal Information

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