DoorDash

DoorDash connects customers with local restaurants, grocery stores and retailers through an on-demand delivery platform. It also provides merchants with delivery, pickup and direct online ordering tools.

Its engineering teams use machine learning and generative AI for personalization. A shared consumer-memory platform extracts meaning from behavioral signals and supplies that context to both conventional models and language-model applications.

DoorDash separates some generative work from the live request path. Its personalized carousel system generates content offline, then combines vector and structured retrieval when serving customers, with automated evaluations supporting iteration.