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Staff Machine Learning Engineer - Ads Optimization

Remote, USA Full-time Posted 2026-06-17

Description: • 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. Requirements: • 7+ years of contributing high-quality code to production systems that operate at scale. • 5+ years of experience building control systems, PID controllers, multi-armed bandits, reinforcement learning algorithms, or bid/pricing optimization systems. • Experience leading large engineering teams and collaborating with cross-functional partners is required. • Experience designing optimization algorithms in an ad serving platform and/or other marketplaces is preferred. • Experience with state of the art control systems, reinforcement learning algorithms is a strong plus. Benefits: • Comprehensive Healthcare Benefits • 401k Matching • Workspace benefits for your home office • Personal & Professional development funds • Family Planning Support • Flexible Vacation (please use them!) & Reddit Global Wellness Days • 4+ months paid Parental Leave • Paid Volunteer time off Apply Job!

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