Backend Separation of Concerns and Module Boundaries
Learn how to set backend module boundaries, keep dependencies pointed in one direction, and avoid coupling that makes routine changes risky.
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API Authentication vs. Authorization: Identity and Access
Understand API authentication and authorization, how they differ in request handling, and how to avoid common identity and access-control mistakes.
API Clients, Servers, and Network Boundaries Explained
Understand what API clients and servers each own, how network boundaries fail, and how timeouts, retries, and trust boundaries shape reliable integrations.
API Deprecation, Migration, and Change Communication
Plan API deprecations with clear timelines, migration guidance, usage data, and staged rollouts so consumers can move without surprise outages.
API Examples, Schemas, and Useful Error Documentation
Write API examples, schemas, and error docs that help developers send valid requests, handle failures, and understand exactly what a response means.
API Filtering, Sorting, Pagination, and Field Selection
Build collection endpoints that let clients narrow, order, page through, and shape results without slow queries or unstable response behavior.
API Gateway and Integration Monitoring
Monitor API gateways and downstream integrations with route-level health signals, dependency metrics, useful alerts, and clear ownership boundaries.
Idempotency, Deduplication, and Safe Replays
Design idempotent API operations and deduplication records so clients can retry after timeouts without creating duplicate payments, jobs, or updates.
API Input Validation, Secrets, and Sensitive Data
Validate API inputs at trust boundaries, handle secrets safely, and limit sensitive data exposure in logs, storage, and error responses.
API Keys, Sessions, and Service Credentials Explained
Compare API keys, browser sessions, and service credentials, then choose storage, rotation, and transport practices that fit each API client.