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Staff Machine Learning Engineer

Quantcast

$220,200 - $255,900
Oct 6, 2025
San Francisco, CA, US
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Quantcast is redefining digital advertising with its AI-powered Demand Side Platform (DSP). The Modeling team is responsible for building and maintaining ML systems that predict various characteristics of users in real-time to maximize advertiser outcomes and provide high-quality demographic and behavioral analysis of digital audiences.

Requirements

  • Fluency in Python, Java, or similar object-oriented programming language
  • Strong knowledge of ML algorithms such as classification, control systems, optimization, clustering, LLMs, or recommendation systems
  • An interest in distributed system and software design, concurrent algorithms, data structures, and software engineering
  • Strong skills in math, statistics, data visualization, and storytelling

Responsibilities

  • Design, code, test, and debug ML applications and constantly improve large-scale global systems that respond to millions of real-time requests per second efficiently.
  • Prototype solutions, conduct data analyses to tackle large-scale inference problems, and run ML experiments to test new modeling ideas.
  • Write clean, efficient, and maintainable code using industry best practices.
  • Work multi-functionally with other teams to develop standard methodologies in model building and validation, and collaborate closely with engineering teams to deliver high-quality ML products.
  • Identify performance bottlenecks and optimize system components for enhanced scalability.
  • Mentor machine learning engineers to grow their careers and improve their skills, including participating in code reviews and providing constructive feedback to team members.
  • Generate and review proposals for further research and development directions.

Other

  • M.S in Computer Science or related technical field with 8+ years of industry experience or Ph.D. with 5+ years
  • You must be work-authorized in the United States without the need for employer sponsorship.
  • This is a hybrid role based in our San Francisco office. To ensure a manageable commute for in-office days, candidates must reside within a 60-mile radius of San Francisco, CA. No relocation candidates at this time.
  • Strong analytical, planning, and social skills
  • Experience coaching and developing junior machine learning engineers