DevTech Insights

Mastering R2DBC and Reactive Relational Access in Spring Boot

Learn how to implement reactive database access using R2DBC in Spring Boot. Compare with JDBC, explore configuration, and write non-blocking SQL queries for...

Migrating Blocking Code to Virtual Threads: A Step-by-Step Guide

Learn how to migrate legacy Java applications from platform threads to virtual threads. Practical guide with code examples, pitfalls, and performance tips.

CRaC: Cutting Spring Boot Startup Time with Coordinated Restore at Checkpoint

Learn how to use Coordinated Restore at Checkpoint (CRaC) to reduce Spring Boot startup time by up to 90%. A practical guide for Java developers.

Building Native Images with Spring Boot and GraalVM: A Complete Guide

Learn how to build high-performance Spring Boot native images using GraalVM, Maven, and Docker. Step-by-step guide with configuration examples.

Spring Boot 4 and Spring Framework 7: What's Changing in 2026

Explore the major updates in Spring Boot 4 and Spring Framework 7. From native compilation to project Loom, here is what Java developers need to know for 2026.

Java 25 Preview: Features Backend Developers Should Watch

Explore Java 25 preview features transforming backend development. Learn about virtual threads, pattern matching, and performance enhancements for modern Jav...

What's New in Java 24: Stream Gatherers, Scoped Values, and More

Explore Java 24 features including Stream Gatherers for functional transformations, Scoped Values for immutable context passing, and other key updates for mo...

Building a Coding Assistant Backend with Java and LLMs

Learn how to build a production-ready coding assistant backend using Java, Spring Boot, and LLMs. Includes architecture, code examples, and best practices.

RAG Evaluation Metrics: Faithfulness, Relevance, and Hallucination

Learn how to evaluate RAG systems using faithfulness, relevance, and hallucination metrics with practical Python examples and LLM-as-a-judge techniques.

Tool-Use Frameworks for Java: From Function Calling to Agents

Learn how to build LLM-powered agents in Java using tool-use frameworks, function calling, and practical code examples.