[Hiring] Director of Safety ML @Reddit

Role Description

We’re looking for a Director of Machine Learning to lead Reddit’s efforts in building industry-leading ML systems that keep our platform safe and foster healthy online communities. This leader will drive the strategy, development, and deployment of machine learning models that detect and prevent harmful content and behavior at scale.

In this role, you will:

• Own the roadmap for Safety and moderation ML.
• Lead a team of applied scientists and engineers.
• Partner cross-functionally across Product, Engineering, Safety operations, Trust & Community, and AI/ML Platform.
• Innovate on real-time detection, automation, and user protection systems.
• Leverage modern ML — including fine-tuned LLMs — to ensure Reddit remains a safe, welcoming, and positive environment for our global user base.

Qualifications

• 10+ years of experience in Machine Learning, AI, or applied research, with a strong background in Trust & Safety, abuse prevention, detection, or content integrity.
• 5+ years of experience leading multi-disciplinary ML teams of 25+ resources (applied science, engineering, analytics) in a high-growth or high-impact environment.
• Proven track record of shipping ML systems at scale in production, ideally including transformer-based models and LLM fine-tuning.
• Depth in NLP, content understanding, detection systems, supervised and weak-supervision techniques.
• Strong cross-functional leadership skills, with ability to influence executives and foster alignment across Safety, Product, and Engineering.
• Thought leadership in responsible AI, safety ML research, or safety measurement frameworks.
• Entrepreneurial mindset — experience founding or scaling a product or ML org.

Requirements

• Experience building or operating real-time abuse detection and automated moderation systems in a complex user-generated content ecosystem.
• Prior work in consumer-facing tech, social platforms, or large-scale community-driven products.

Benefits

• Comprehensive Healthcare Benefits and Income Replacement Programs
• 401k with Employer Match
• Global Benefit programs that fit your lifestyle, from workspace to professional development to caregiving support
• Family Planning Support
• Gender-Affirming Care
• Mental Health & Coaching Benefits
• Flexible Vacation & Paid Volunteer Time Off
• Generous Paid Parental Leave