NET Backend (8+ years)* - Core Web API on IIS; Entity Framework Core (advanced: migrations, temporal tables, schema isolation) - Domain-Driven Design in practice: aggregates, domain events, anti-corruption layers - API design (RESTful, contract-first, versioned, paginated) including API Gateway / BFF patterns - CQRS (MediatR), durable background jobs (Hangfire), real-time push (SignalR) * Angular Frontend (5+ years)* - Component architecture, lazy-loaded modules, reactive forms, RxJS - State management with NgRx; real-time UI via SignalR/WebSocket - Strong UX sensibility. Able to collaborate with operator SMEs and achieve mental-model parity with legacy screens * SQL Server (5+ years)* - Scalable schema design: high-volume tables, partitioning for growth, archival strategies, read/write separation - Core design craft: normalization (3NF+), schema-per-service, indexing strategies (clustered, filtered, covering), constraints, temporal tables - Performance optimization: Query Store, execution plan analysis, wait statistics, index tuning Distributed Systems & Messaging (5+ years)* - Kafka/RabbitMQ at production depth: partitioning, consumer groups, exchange types, dead-letter handling, exactly-once semantics, clustering/HA - Patterns: transactional outbox, saga/process manager, idempotent consumers - Resilience: circuit breaker, retry with backoff, bulkhead isolation - Event-driven architecture; contract-first API design | 
