Build type-safe GraphQL APIs in Spring Boot using Spring for GraphQL. Learn schema definition, queries, mutations, subscriptions, DataLoader for N+1 prevention, authentication, testing, and production best practices with complete Java examples.
Explore how Redis actually works by reading its C source code on GitHub. Learn about robj, incremental rehashing, the event loop, integer encoding, and adaptive list storage — the real internals that make Redis so fast.
Master SQL fundamentals from scratch. Learn SELECT queries, filtering, aggregation, all JOIN types with diagrams, subqueries, and the actual execution order SQL uses — with real-world examples throughout.
Complete SQL and NoSQL learning roadmap for developers. Master SQL fundamentals, advanced queries, PostgreSQL, MongoDB, Redis, indexing, transactions, schema design, and when to choose SQL vs NoSQL.
Learn Express.js fundamentals from scratch. Set up your first Express server, understand middleware, handle HTTP requests, and build a simple REST API with complete code examples.
Master software architecture patterns from monoliths to microservices. A comprehensive roadmap covering layered, event-driven, hexagonal, clean architecture, CQRS, DDD, serverless, and how to choose the right pattern.
Deep dive into IoT communication protocols. Learn MQTT pub/sub with QoS, CoAP for constrained devices, AMQP for enterprise messaging, and WebSocket for real-time dashboards with practical setup examples.
Master Spring Boot performance optimization with JVM profiling, Actuator metrics, database tuning, HTTP caching, GC optimization, and startup acceleration. A complete guide to building high-performance Java applications with measurable improvements.
Go beyond unit and integration tests. Learn consumer-driven contract testing with Spring Cloud Contract, API compatibility verification, performance testing with Gatling, load testing strategies, and advanced testing patterns for production-ready Spring Boot applications.
Master IoT development from fundamentals to production systems. Learn MQTT, edge computing, data pipelines, security, and scaling patterns in this comprehensive 12-post series.