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Build reusable Terraform modules with versioning, testing, and composition. Scale infrastructure across accounts and regions without code duplication.
Manage Terraform state safely with S3+DynamoDB, organize code with versioned modules, use Terragrunt to eliminate duplication, and enforce quality with pre-commit hooks and policy checks.
Use TestContainers to run real PostgreSQL, Redis, and Kafka in tests. Isolate data per test, parallelize safely, and catch integration bugs before production.
Twilio has an outage. Every user trying to log in can''t receive their OTP. Your entire auth flow is blocked by a third-party service you don''t control. Fallbacks, secondary providers, and graceful degradation are the only way to maintain availability.
You wrote perfectly async Node.js code — no blocking I/O, no synchronous loops. Yet under load, responses stall and CPU pegs. The culprit is Node.js''s hidden libuv thread pool being exhausted by crypto, file system, and DNS operations. Here''s what''s really happening.