Senior Staff Machine Learning Engineer, ML Understanding
$266K–$372K
Remote - United States · Remote · Senior Staff · Full-time · Posted Sep 30, 2026
- Experience
- At least 10 years.
About the job
Lead the strategy and development of Reddit’s scalable user-understanding systems to power personalization across Feeds, Notifications, Search, and Ads.
What you'll do
- Set the technical vision for user representations, including embeddings, interests, attributes, and LLM-based profiles.
- Build and deploy large-scale user models and the infrastructure for their learning, storage, retrieval, and serving.
- Drive cross-team adoption and measurable impact; mentor engineers and lead technical reviews.
What they ask for
- At least 10 years of experience building and scaling production-grade ML systems, particularly in user modeling, large-scale representation learning, or recommender systems.
- Strong fundamentals in user-understanding ML approaches and their real-world trade-offs.
- Track record of leading ambiguous, high-impact initiatives from concept to production.
- Experience or strong intuition applying LLMs or foundation models to evolve existing systems.
Pay
$266,000 — $372,400 USD (base salary)
Tools
LLMs, foundation models, embeddings, MLOps
AI focus
Use LLMs and foundation models to develop richer user understanding, including dynamic profiles, intent inference, and semantic reasoning over behavior, for more adaptive personalization.
Model-written summary · the original posting is authoritative