U.S. Meituan DoorDash Builds In-House Cloud Agent Platform Flux: Automates 130,000 Engineering Tasks in One Month

According to Donews Beating monitoring, the U.S. food delivery platform DoorDash has released the internal cloud-based Agent platform Flux, allowing engineers to directly delegate tasks such as code reviews, CI troubleshooting, and daily maintenance to the Agent backend. Within one month, Flux has automatically performed 130,000 engineering tasks and now completes over 25,000 code reviews weekly.

DoorDash uses Firecracker microVM to create a separate isolated environment for each task, where the required codebase, development tools, and permissions are temporarily packaged. To prevent the Agent from running amok internally, Flux has also built an MCP gateway. Each task can only invoke pre-declared tools and permissions, and all operations are logged for auditing. Engineers can encapsulate tasks into Playbooks, which can be repeatedly invoked from Slack, GitHub, CLI, or scheduled tasks.

Prior to this, DoorDash had already heavily integrated AI into its development process. CEO Tony Xu revealed that close to two-thirds of the code is now written by AI. However, he also believes that relying solely on AI to write code is insufficient, as coding is only a part of an engineer's job.

Flux effectively extends this AI automation system from "code writing" to the entire engineering workflow, allowing the Agent to take over tasks such as code reviews, troubleshooting, and maintenance in the background.