Designing reliable APIs - Idempotency-Key server implementation with Postgres, optimistic locking, safe retries with backoff and jitter, timeouts, webhook delivery with HMAC signing and replay protection, and AsyncAPI for event contracts.
A comprehensive guide to the Dead Letter Queue (DLQ) pattern — covering poison pill handling, retry strategies, alternatives comparison, AWS SQS / Kafka / RabbitMQ implementations, and production deep dives for senior engineers.
Load balancing algorithms, health checks, failover strategies, chaos engineering, disaster recovery, and SRE practices for building reliable distributed services.
Senior analysis of landmark production outages and reliability architectures — Facebook 2021 BGP/DNS global collapse, AWS Kinesis 2020 OS thread exhaustion, Stripe Idempotency-Key state machine, Discord Go to Rust GC tail latency rewrite, and Graceful Degradation tiers.
Deep-dive into the Sidecar pattern — Linux namespace internals, Kubernetes native sidecar lifecycle, PgBouncer connection pooling, Vault secrets injection, config hot-reload, Spring Boot integration, and production failure modes for senior engineers.
Guide to the Strangler Fig pattern for migrating monoliths to microservices. Details bounded context mapping, Anti-Corruption Layer (ACL) Spring Boot code, dual-writing data sync, eventual consistency, and migration gotchas.
