Production runbook for blockchain backends - deposit detection with reorg safety, nonce management, transaction replacement, idempotency, key custody with HSM/MPC, RPC resilience, gas estimation, observability, and incident response.
A complete, end-to-end cloud production architecture guide on AWS — covering Multi-AZ VPCs, ALB, EC2 Auto Scaling, RDS Multi-AZ, S3 Event Pipelines, Lambda, SQS, Secrets Manager, and KMS.
Production operations guide for Kafka Streams: unit testing with TopologyTestDriver, observability metrics runbook, 7 fatal anti-patterns, 5-way streaming engine comparison, system design architectures, and complete failure mitigation matrix.
Comprehensive guide to eliminating transient 502 Bad Gateway and Connection Reset errors during rolling updates and HPA scale-in using Kubernetes Pod Termination Lifecycle, preStop hooks, and Spring Boot 3 graceful shutdown.
Principal-level deep dive into SLF4J 2.x architecture, log level severity gates, parameterized evaluation, reading and formatting multi-layer Java error stacktraces, JVM fillInStackTrace() mechanics, FastThrow JIT optimizations, and production logging patterns.
