Principal Machine Learning Engineer, Ads & Promos Delivery
Core
Lead technical direction for AI-first ranking and relevance systems that power ads and promotions delivery, shaping how ads are selected, ordered, and personalized in real time across search and discovery experiences.
Role type
Principal Machine Learning Engineer (Ads & Promos Delivery)
Builds
Next-generation AI-first ranking systems, sequence modeling, deep learning, and LLM-powered decisioning for a closed-loop marketplace.
Domain
Food delivery and retail e-commerce advertising
Deliverable
production ML models
Required skills
deep learning, large language models (LLMs), information retrieval, ranking and relevance, recommendation systems, natural language processing, Python, Java, C++, PyTorch, TensorFlow, XGBoost, full ML lifecycle management, offline and online experimentation, feature engineering
Preferred skills
LLM-based system design, prompt engineering, retrieval-augmented generation (RAG), Generative RecSys, open-source contributions, applied research in ML/NLP
Technologies
PyTorch, TensorFlow, XGBoost, Claude Code, Codex, Cursor
Responsibilities
Design and build next-generation AI-first ranking systems using state-of-the-art techniques; evaluate ML and LLM models using offline analysis and online experimentation; own the full model lifecycle from research to production; partner with product managers, data scientists, and designers to deliver user-facing improvements; assess emerging research and translate promising approaches into scalable, production-ready systems.
Seniority
Principal, hands-on IC with strategy & mentorship
