Block’s Builderbot Handles 15% of Production Code

Block rolled out a new suite of AI-native tools called Builderbot, which the company says executes roughly 15% of all production code changes. The tool runs more than 200,000 operations per day and merges about 1,500 pull requests per week. "The best way to think about Builderbot is as the missing layer between AI coding tools and how engineering actually works at scale," said Brad Axen, head of AI capabilities at Block.

"What used to take months now takes days." Builderbot acts as an orchestration layer, coordinating multiple AI agents across Block’s entire codebase rather than being limited to a single repository. It maps every service, API and convention so engineers can make changes across the company’s systems; an engineer working on Cash App, for example, can use it to alter a Square service they have never touched.

With the AI handling repetitive work, production can scale up while engineers focus on product decisions.

builderbot, block, production code, pull requests, ai native, ai agents, orchestration layer, cash app, square, api