APIs, Networking & Integration Topics
API design, management, and integration patterns including REST, GraphQL, and other protocols. Covers API contract design, versioning strategies, error handling, idempotency, deprecation planning, and SDK/integration frameworks. Includes system-to-system integration, webhook patterns, and integration platform considerations. Excludes network infrastructure and network-layer protocols (see Network Architecture under Cloud & Infrastructure or a dedicated networking category if needed).
Enterprise Application Integration
Connecting large, heterogeneous enterprise systems into a coherent whole: interoperability across legacy and modern platforms, integration architecture for digital transformation, standards-based interfaces, and system-of-record coordination. Covers integration platforms/middleware, canonical data models, and the interoperability and governance concerns of complex multi-system landscapes.
API Versioning, Deprecation and Backward Compatibility
Evolving an API without breaking existing consumers: versioning strategies (URI, header, media-type), distinguishing breaking from non-breaking changes, deprecation policies and sunset timelines, and coordinating migrations at scale. Covers communicating changes, supporting multiple versions concurrently, and compatibility guarantees across heterogeneous clients.
API Gateways and API Management
The management layer in front of APIs: gateways for routing, authentication, rate limiting, request/response transformation, and observability. Covers API management concerns such as developer portals, key provisioning, plan/tier enforcement, analytics, and centralized policy. The operational and productization surface of an API program.
Third-Party and SaaS Integration
Integrating with external providers and SaaS platforms (CRM, marketing, payments, HR, and similar): consuming partner APIs, handling auth and rate limits you do not control, mapping external data models to internal ones, and resilience when a dependency is down. Covers connector/adapter design, sandbox testing, and managing vendor-specific quirks across many integrations.
API Documentation and Developer Experience
Documentation and developer experience for API consumers: reference docs for endpoints and fields, OpenAPI-driven and interactive documentation, quickstarts and runnable code samples, doc comments that feed generated reference, changelogs, deprecation notices and migration guides, error messages and error tables that explain themselves, developer portals, sandboxes and onboarding flows. Covers developer experience (DX) as a product concern: time to first successful call, DX and docs-effectiveness metrics and dashboards, diagnosing onboarding drop-off, developer feedback loops, experiments and developer research, documentation standards and CI checks across teams, prioritising DX investment, and reducing support load through better docs and self-service. Designing the API itself (versioning policy, auth, rate limits, webhooks, gateways, SDK engineering) is a separate subject.