Design patterns for reliable, scalable workflow systems. Event-driven vs polling, idempotency, saga patterns.
REST, GraphQL, webhooks. Rate limiting, pagination, versioning, and backward compatibility strategies.
Schema enforcement, JSON Schema, data contracts with Pact, runtime validation with Zod/Yup.
Secrets management (Vault, AWS SM), RBAC, OAuth2 flows, dependency scanning, SAST integration.
OpenTelemetry instrumentation, Grafana dashboards, structured logging, distributed tracing, alerting.
Tool-calling, RAG pipelines, prompt routing, evaluation loops, cost monitoring, and safety guardrails.
Docker, Kubernetes manifests, Helm charts, Terraform modules, CI/CD pipeline integration.
Runbook creation, on-call tooling, blameless post-mortems, incident timeline playbooks.