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Staff Machine Learning Engineer, Bidding and Pacing (Advertiser Optimization)

Reddit

$230,000 - $322,000
Aug 13, 2025
Remote, US
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Reddit is looking to build state-of-the-art bidding optimization systems to enhance advertiser value and increase the efficiency and ROI for advertisers on its platform.

Requirements

  • Experience designing optimization algorithms to solve business problems, such as ads bidding, ads pacing, ads auctions, last mile delivery, or similar systems.
  • Experience driving significant technical innovation with either large engineering teams or cross-functional stakeholders
  • 7+ years of contributing high-quality code to production systems that operate at scale.
  • Strong proficiency in one or more general-purpose programming languages such as Java, Python, Go, or C++
  • Experience with data processing frameworks and data storage technologies
  • Hands-on experience with machine learning frameworks such as TensorFlow or PyTorch

Responsibilities

  • Building Reddit-scale optimizations to improve advertiser outcomes using cutting-edge techniques in the industry.
  • Leverage live auction data and model predictions to adjust campaign bids in real time.
  • Incorporate knowledge of the Reddit ads marketplace into budget pacing algorithms powered by control & reinforcement learning systems
  • Lead the team on designing new bid & budget optimization products and algorithms as well as conducting rigorous A/B experiments to evaluate the business impact.
  • Actively participate and work with other leads to set the long term direction for the team, plan and oversee engineering designs and project execution.

Other

  • As a staff machine learning engineer in the Advertiser Optimization team, you will work closely with technical leaders to build new advertiser optimization products like target CPA and target RoAS bidding, optimized CPM, view through optimization, etc that significantly increase the efficiency and ROI for the advertisers.
  • You will be responsible for the quality and technical approach within the team; partner with other leads in direction setting, planning, and overseeing engineering designs and executions; establish and contribute to the group’s culture and processes.
  • You will collaborate with cross-functional engineering, product, and marketing teams to ensure that our customers’ voices are represented in your work.
  • You will design, conduct, and analyze experiments to quantify the impact of the systems that you build.
  • As a leader of this team, you will help us uplevel the capabilities of Reddit Ads platform through innovative optimization products that enhance advertiser value.