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Spring Boot integration testing with Testcontainers and PostgreSQL, Redis, Kafka
BACKEND

Testcontainers Spring Boot: Painless Integration Testing

Complete guide to configuring Testcontainers with Spring Boot 3.4. PostgreSQL, Redis, Kafka in Docker containers for reliable, reproducible integration tests.

Spring Boot Transaction Propagation: interview questions and practical examples
BACKEND

Spring Boot Interview: Transaction Propagation Explained

Master Spring Boot transaction propagation: REQUIRED, REQUIRES_NEW, NESTED and more. 12 interview questions with code examples and common pitfalls.

Solving the N+1 problem with Spring Data JPA using fetch join and EntityGraph
BACKEND

Spring Data JPA N+1 Query Solutions: Fetch Join, EntityGraph and Hibernate 7.4

Complete guide to detecting and fixing the N+1 problem in Spring Data JPA. Fetch join, @EntityGraph, batch fetching, and query performance strategies.

OAuth2 Resource Server Configuration with Spring Security 6
BACKEND

Spring Security 6: OAuth2 Resource Server Setup

Practical guide to configuring an OAuth2 Resource Server with Spring Security 6. JWT validation, issuer configuration, scope management, and Keycloak integration.

Spring Boot 3.4 Virtual Threads: Interview Questions and Performance Benchmarks
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Spring Boot 3.4 Virtual Threads: Interview Questions and Performance Benchmarks

Master Java 21 Virtual Threads with Spring Boot 3.4: 15 interview questions, performance benchmarks, and migration patterns to ace your technical interviews.

CloudKit synchronization with SwiftUI for iOS developers
MOBILE

CloudKit with SwiftUI in 2026: Cross-Device Data Sync Patterns

Complete guide to implementing CloudKit sync with SwiftUI: CKSyncEngine, SwiftData integration, conflict resolution, and best practices for iOS 2026.