REST APIs

REST API design remains the foundation of modern web services, connecting mobile apps, frontend applications, and backend systems across the internet. Despite emerging alternatives like GraphQL and gRPC, REST's simplicity and HTTP-based nature ensure its continued dominance in API-first architectures. Companies building SaaS products, mobile applications, or microservices rely on engineers who understand resource modeling, versioning strategies, and proper HTTP semantics. The skill extends beyond basic CRUD operations to encompass authentication patterns, rate limiting, pagination, and backward compatibility concerns. Well-designed APIs become product differentiators and revenue streams through public API programs and partner integrations. The proliferation of API-first companies and the growing API economy has made REST API expertise a requirement across backend, full-stack, and platform engineering roles.