How to Build Microservices
Design and implement a microservices architecture with proper service boundaries and communication.
What You'll Learn
This advanced-level guide walks you through how to build microservices step by step. Estimated time: 18 min.
Step 1: Identify service boundaries
Decompose your application into services based on business domains using Domain-Driven Design principles.
Step 2: Choose communication patterns
Select REST for synchronous calls, message queues for async, and event-driven for decoupled communication.
Step 3: Implement service infrastructure
Set up service discovery, API gateway, load balancing, and configuration management.
Step 4: Add observability
Implement distributed tracing, centralized logging, and service health dashboards across all services.
Step 5: Handle failure gracefully
Implement circuit breakers, retries with backoff, and fallback strategies for service failures.
Frequently Asked Questions
When should I use microservices?▾
Only when your team and codebase are large enough that a monolith causes coordination problems. Most startups should start with a monolith.
How do microservices communicate?▾
REST or gRPC for synchronous requests, message queues (RabbitMQ, SQS) for async, and event buses for decoupled communication.
How do I handle distributed transactions?▾
Use the Saga pattern with compensating transactions rather than distributed two-phase commits. Design services to be eventually consistent.