Principal Machine Learning Engineer, Ads & Promos Delivery
DoorDash USA · Sunnyvale
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- Company
- DoorDash USA
- Location
- Sunnyvale
- Salary
- $268,600 — $395,000
- Posted
- March 27, 2026
About this job
As a Principal Engineer, you will lead the technical direction for AI-first experiences, including ranking and relevance systems that sit at the core of our ads marketplace and shape how ads are selected, ordered, and personalized in real time across all verticals. You will design and build next-generation AI-first ranking systems using state-of-the-art techniques such as sequence modeling, deep learning, and large language models (LLMs). Your work will span query understanding, user and merchant representation learning, contextual relevance, and multi-objective optimization, balancing advertiser value, consumer experience, and marketplace health at scale.…
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