Member of Technical Staff (ML Engineer, Recommendations & User Modeling)
Core
Design, build, and optimize recommendation systems and user modeling to personalize the Perplexity AI experience and drive core user metrics.
Role type
Senior IC ML Engineer (Recommendations & User Modeling)
Builds
Personalized recommendation and ranking systems for Perplexity's core AI product
Domain
AI / LLMs / Personalization
Deliverable
production ML models
Required skills
production recommendation systems, ranking, user modeling, LLM integration, engagement modeling, model calibration, online experimentation
Preferred skills
large-scale ranking infrastructure, feature stores, real-time serving, lifecycle modeling
Technologies
LLMs, feature stores
Responsibilities
Own personalization and ranking for key product surfaces, build user modeling for intent and preference, design decision layers balancing objectives, build data and evaluation foundations, shape technical direction for ranking and personalization
Seniority
Senior, hands-on IC