Senior Staff Machine Learning Engineer, ML Understanding

Reddit is seeking a Senior Staff Machine Learning Engineer to lead its next-generation user understanding initiative, building a unified, high-fidelity representation of each user that powers personalization across the platform.

The successful candidate will set the technical direction for this space, leading the design and implementation of Reddit's core user representation layer, spanning embeddings, interest modeling, and key user attributes.

Key responsibilities:

• Design a unified user understanding framework and strategy
• Build foundational user models using large-scale user representation learning
• Reimagine user understanding with LLM/Gen-AI
• Ship large-scale user understanding as a system
• Drive cross-team integration and impact
• Set technical bar and mentor engineers

Requirements:

• At least 10 years of experience building and scaling production-grade ML systems
• Track record of driving ambiguous, high-impact initiatives from concept to production
• Strong fundamentals in mainstream user understanding ML approaches
• Experience with GenAI shift and LLMs or foundation models
• Ability to think in systems, not just models
• Influence beyond immediate team and drive alignment across multiple stakeholders
• Raise technical bar and mentor senior engineers

Benefits:

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