Building cloud-native applications is hard. Here's what I've learned.

1. Design for Failure

Assume every component will fail. Build redundancy and graceful degradation from day one.

2. Observability is Not Optional

You can't fix what you can't see. Invest early in structured logging, distributed tracing, and metrics.

3. Kubernetes is Complex

The abstraction is powerful but the operational burden is real. Start simple, scale gradually.

4. Automation is Everything

Manual deployments are a liability. CI/CD pipelines, GitOps, and infrastructure as code are not optional at scale.

5. Documentation Wins

The best systems have both code and docs written with care. Your future self will thank you.