Competencies: Software Engineering > API Development

REST API Design

Designing RESTful APIs following HTTP semantics, resource naming conventions, status codes, pagination patterns, and OpenAPI specification.

High

Backend, API, Architecture

API Authentication

OAuth 2.0, JWT, API keys, session tokens, bearer authentication

Critical

Backend Developer, Security Engineer

API Documentation

OpenAPI/Swagger, API portals, code samples, SDK generation

High

Backend Developer, Technical Writer

Rate Limiting

Token bucket, sliding window, quota management, API throttling

High

Backend Developer, SRE

API Versioning

URL versioning, header versioning, deprecation strategies, breaking changes

High

Backend Developer, Software Architect

GraphQL Development

Schema design, resolvers, mutations, subscriptions, DataLoader

Medium

Backend Developer, Full-Stack Developer

gRPC Development

Protocol Buffers, service definitions, streaming, code generation

Medium

Backend Developer, Systems Developer

Webhooks

Event delivery, retry logic, signature verification, idempotency

High

Backend Developer, Integration Engineer

API Security

Input validation, CORS, injection prevention, secure headers

Critical

Backend Developer, Security Engineer

API Testing

Contract testing, integration testing, mock services, API test automation

High

Backend Developer, QA Engineer

REST API Design

Advanced

44-endpoint API with consistent resource naming, HTTP method semantics, status codes, pagination, error responses; OpenAPI documentation

domus-api

No HATEOAS, no API versioning strategy, no rate limiting implementation