Backend API Mastery

Build first endpoints with clean project structure.

Validate input and return consistent API errors.

JWT, role checks, permissions, and protected routes.

Schema design, relations, and safe query patterns.

Integration tests, contract checks, and reliability patterns.

Caching, pagination, queues, and throughput optimization.

Structured logs, tracing, metrics, and incident diagnostics.

Webhooks, async jobs, retry strategies, and idempotency.

Boundaries, API lifecycle, versioning, and governance.

Defense-in-depth for APIs, secrets, and abuse prevention.

CI/CD, deployment safety, rollbacks, and SLO practices.