Staff Machine Learning Engineer, Ads Creative Effectiveness

Reddit's Ads Creative Effectiveness team builds GenAI and predictive products to help advertisers create high-impact campaigns. We're seeking a Staff Machine Learning Engineer with expertise in GenAI to develop best-in-class image, video, and copy generators that leverage Reddit's best practices.

Responsibilities:

• Design and implement advanced generative workflows for ad creative generation
• Develop end-to-end image and video editing capabilities for advertisers
• Fine-tune large vision-language models to understand winning ad aesthetics
• Engineer robust filtering and safety systems to prevent non-compliant content
• Collaborate with cross-functional teams to integrate ACE capabilities into the Ad Manager UI and ad delivery path

Requirements:

• Deep expertise in machine learning, particularly LLM/VLM fine-tuning and RLHF/RLPF for ads
• Experience with uplift metrics, variance, and experimentation setups for generative systems
• Understanding of auction dynamics and advertiser pain points
• Strong communication skills to distill complex ML trade-offs for non-technical stakeholders
• Prior work on ad creative tooling is a plus

Nice-to-have:

• Experience navigating brand-safety, privacy, or copyright frameworks in generative AI products

Benefits:

• Comprehensive healthcare benefits and income replacement programs
• 401k with employer match
• Global benefit programs
• Family planning support
• Mental health and coaching benefits
• Flexible vacation and paid volunteer time off
• Generous paid parental leave

Pay Transparency:

• Base salary range: $230,000-$322,000 USD