Block’s Builderbot automates 15% of production code changes

The tool operates as an agent-based system within Slack, allowing developers to trigger complex workflows by describing a task. Once initiated, Builderbot researches requirements, plans the implementation, writes code, and navigates continuous integration pipelines. According to Brad Axen, Block’s head of AI capabilities, the system bridges the gap between basic coding assistants and the practical realities of managing large-scale, cross-service codebases. It specifically targets scaffolding and repetitive engineering work, enabling teams to ship features that previously faced months of delays.

While Builderbot touches system configurations and source code, Block emphasizes that it remains isolated from sensitive customer or payment data. The deployment marks a tangible milestone in Dorsey’s broader corporate restructuring, which has seen the company pivot toward leaner teams supported by AI infrastructure. With 100% of the firm's engineers now utilizing AI tools, the focus has shifted toward human-led oversight, where developers concentrate on high-level judgment and product direction while the system manages the technical execution.