Part 2 of 8 · week 2 of the learning path

Microservices let many teams release and scale parts of a system independently, but they trade simple code for a distributed system, so use them when the organization needs the independence.

Learning objectives

Decide between a modular monolith and microservices for a given team and product.

Draw service boundaries, own data per service and choose how services communicate.

Keep multi-service workflows consistent and resilient.

Principles

Boundaries follow business capabilities, so a change usually touches one service.

Each service owns its data; others reach it only through its API or events.

Services deploy independently, and the team that builds a service runs it.

Start with a well-structured modular monolith and split out services when a real need appears.

Communication

Style Use it for Watch out for

Synchronous (REST, gRPC) Queries and steps where the caller needs an answer now Latency adds up, failures cascade

Asynchronous (events, queues)…