Microservices Architecture Tutorial

This course is for developers with a year or two of backend experience who keep hearing the word microservices in design discussions and interviews, and want a balanced view rather than a sales pitch. You should be comfortable building a web API and talking to a database. If you want a framework to practise with, the Spring Boot course pairs naturally with it.

The four lessons follow the order in which the real decisions arrive. First, whether you should split a system at all, with an honest checklist that often says no. Second, where the seams belong, using bounded contexts instead of technical layers. Third, how services talk to each other, covering timeouts, retries, idempotency, events and the API gateway. Fourth, how to keep data consistent without distributed transactions, using sagas and the outbox pattern, and how to see what is happening with logs, metrics and traces.

Each lesson uses its own example (a grocery-delivery startup, an event-ticketing platform, a pharmacy refill flow, a furniture order) and the code is small and self-contained. The Python and SQL snippets were executed and the printed output is exactly what they produce. There are no invented benchmarks or company anecdotes: the numbers in this course are arithmetic you can reproduce yourself.