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Apache Kafka & Event Streaming Architecture
What actually breaks when your checkout flow calls five services synchronously, and how Kafka's partitions, consumer groups, and replication fix it — plus what goes wrong with rebalances and acks in production.
Distributed Caching & Eviction Policies
Why a database that handled 10K requests a minute falls over at 10:01, and how cache write policies, eviction strategies, and distributed caching failure modes actually get chosen in production.
Microservices Communication Patterns
Master synchronous (gRPC, REST) and asynchronous (event-driven, message queues) communication patterns in distributed systems.
Load Balancing Strategies & Failover Mechanisms
What actually happens when your single web server can't keep up, why sticky sessions become a production headache, and how consistent hashing fixes the "adding a server reshuffles everything" problem.
Database Architectures, Indexing & Sharding
Why "just pick Postgres" isn't always the answer, how B-Trees and LSM-Trees actually change your write performance, and what breaks when you shard a database without thinking about your query patterns first.
Error Handling & Resilience Patterns
Build fault-tolerant systems using circuit breakers, timeouts, retries, bulkheads, and structured error handling.
SQL Query Optimization & Index Strategies
Write efficient database queries using EXPLAIN ANALYZE, index design, and query patterns that scale.
Advanced Caching Strategies & Cache Invalidation
Master multi-level caching, cache warming, invalidation patterns, and monitoring cache health.