DoorDash Uses Envoy and Valkey for a 1.5M RPS Proxy Cache with 99.99999% Availability

Leela Kumili — Mon, 20 Jul 2026 13:53:00 GMT

DoorDash has developed Entity Cache, a transparent proxy caching platform built on Envoy and Valkey to reduce redundant service-to-service requests across its microservices architecture. Operating within DoorDash’s service mesh, the platform serves over 1.5M requests per second with 99.99999% availability through caching, event-driven invalidation, failure handling, and performance optimizations.

By Leela Kumili

How DoorDash Built an AI Shopping Assistant That Doesn’t Rely on the LLM Alone

Leela Kumili — Mon, 13 Jul 2026 14:08:00 GMT

DoorDash details the architecture behind Ask DoorDash, its AI-powered conversational shopping assistant, combining LLMs, specialized AI agents, MCP-based tooling, and an intelligence layer with persistent consumer memory and live backend data. Early results show up to 24% higher checkout conversion, 17% larger baskets, and improved intent accuracy using memory-backed sessions.

By Leela Kumili

InfoQ - Microservices

DoorDash Uses Envoy and Valkey for a 1.5M RPS Proxy Cache with 99.99999% Availability

How DoorDash Built an AI Shopping Assistant That Doesn’t Rely on the LLM Alone