backend-engineer

To design a backend API with JWT refresh tokens and OAuth2, implement HTTPS-only transport, secure password hashing using bcrypt or argon2, and configure rate limiting to control access. This ensures robust authentication and authorization for client integrations.

The best way to structure REST API pagination and error responses is using cursor-based pagination for reliable data fetching and consistent error formats. This resource-oriented approach uses plural nouns, correct HTTP methods, and versioned routes for maintainable client integrations.

Circuit breaker patterns and API gateways improve microservices reliability by routing requests, enforcing rate limits, and preventing cascading failures. Combined with message queues for async work, they build resilient server architectures that maintain service availability under heavy load.

Use cache-aside versus write-through caching strategies based on your performance targets and resource constraints. Cache-aside loads data on demand, while write-through synchronizes data to the cache and database simultaneously, ensuring predictable response p95 latency for backend services.

Yes, this approach supports distributed tracing and event sourcing for auditable workflows. By implementing OpenTelemetry and event sourcing patterns, your microservices generate auditable trails, enabling precise request tracking and consistent system state reconstruction across async workflows.