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Battle-tested senior engineering questions, real-world code snippets, and architectural trade-offs organized across 9+ technology domains.
Master Signals, Zoneless change detection, RxJS interop, OnPush, standalone APIs, and enterprise web performance.
Spring Dynamic Proxies, Bean Lifecycle, Transactional propagation, Spring Security 6, Kafka, and Virtual Threads.
The 4-step System Design Interview Framework, back-of-envelope estimation, load balancers, caching, and database sharding.
Object-oriented modeling, Gang of Four design patterns, SOLID principles, concurrency, and clean enterprise architecture.
Multi-AZ architecture, VPC peering, IAM roles, ECS/EKS containerization, serverless Lambda, and cost optimization.
Java memory model, Garbage Collectors (ZGC/G1), synchronized vs Lock, CompletableFuture, and Virtual Threads.
pgvector HNSW indexes, Reciprocal Rank Fusion (RRF), Cross-Encoder reranking, multi-tenant isolation, and citation validation.
Vector embeddings, chunking strategies, hybrid BM25 + dense search, rerankers, and RAG evaluation frameworks.
Algorithmic patterns, time-space complexity tradeoffs, tree/graph traversal, and coding interview communication strategy.