Conway's Law and Team Topology

When designing microservices, engineers usually focus on technical decisions: service boundaries, APIs, databases, communication patterns, and deployment strategies. But there's another factor that has a major influence on how a system evolves: the way engineering teams are organized.

Imagine two companies building similar e-commerce platforms. In the first company, separate teams own catalog management, orders, payments, and fulfillment. In the second company, teams are organized around technical layers: frontend, backend, and databases. Even if both companies start with similar technology stacks, their architectures may evolve very differently.

Why? Because the people building a system need to communicate and coordinate, and those communication patterns often influence how the software is structured. This relationship is captured by Conway's Law.

Understanding Conway's Law and team topology matters because service boundaries aren't purely technical decisions. They also affect team ownership, deployment independence, and development velocity.