Protecting Our Systems with Intelligence
How we're using agentic reviewers as guardians to maintain system resilience

Every engineering problem tells a story. Here, we share the breakthroughs, lessons, and experiments that shape how we think, how we build, and how we expand access to the global economy.
How we're using agentic reviewers as guardians to maintain system resilience

Migrating 450 Cash App backend repositories into a single scalable monorepo

Turning CI failures into clear actionable feedback

How Block Engineering codified tribal knowledge for AI

Measuring the Cognitive Complexity of Human-AI Collaboration

How We Verify Container Image Signatures and Attestations at Scale

Inside Block’s approach to AI-assisted development, from repo readiness to multi-agent workflows.

Lessons from Operation Pale Fire

Coordinating expensive operations across multiple agents

