Backend

API Design

REST and GraphQL API design principles, versioning, error handling, and documentation patterns

Authentication & Authorization

JWT, OAuth2, SAML, session management, RBAC, ABAC, and MFA implementation

Caching Strategies

CDN, Redis, in-memory cache, cache invalidation, and distributed caching patterns

Database Design

Schema design, normalization, indexing, migrations, and query optimization for SQL and NoSQL

Message Queues

RabbitMQ, Kafka, SQS, pub/sub, competing consumers, dead letter queues, and event streaming

Microservices

Service boundaries, communication patterns, event sourcing, CQRS, and distributed tracing

Node.js Patterns

Async control flow, error handling, module design, streams, and production hardening

Python Patterns

Python best practices including type hints, async patterns, testing, and project structure

Serverless Patterns

Lambda, cold starts, event-driven design, API Gateway, and serverless frameworks