Sole developer on a national SSO platform for six months, with Claude writing most of the code
Solution architect, 17 years in. From roughly March 2026 to July 2026 I was the only hands-on developer on the identity and single-sign-on layer for a…
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Spring AI: Bringing Generative AI into Spring Boot Applications
Artificial Intelligence has moved from being something handled by specialized data-science teams to becoming a feature that application developers can…
Important Design Patterns in a Nutshell
When building complex software systems, writing code that simply "works" is not enough. As systems scale and requirements evolve, poorly structured ob…
The Lateral Isolation Tax: Preventing Direct Communication Between Peer Services
I put together a project to document an architectural discipline I call " Lateral Isolation ". The core idea is simple: preventing direct communicatio…
Как не прерывать длинную задачу и удерживать правила в контексте Veai 5.16
ИИ‑агент редко ограничивается одним ответом, когда работает с большим проектом. Он читает код, ищет использования символов, м…
Port Support You Can Trace Back to a Green Test
“Supported on iOS, Android, desktop, and web” sounds useful until you need one method on one target. Does WebSocket work on watchOS? Which Linux archi…
Джунам можно, а сеньором нельзя? Как я притворился джуном и искал работу
Всем привет, меня зовут Михаил, я работаю Senior Java разработчиком в ОТП Банке. Смотря на всю ситуацию на рынке, я подумал: хм, вот джуны притворяютс…
Building Local AI Agents in Java with Tools4AI and Ollama: An Insurance Claims Use Case
Tools4AI is a 100% Java agentic AI framework that turns any annotated Java method into an AI-callable action. Ollama runs open models like Llama 3.1 a…
Build and Deploy Java AI Agents with Google ADK
Debian 13 “Trixie” provides a clean, stable base for Java agent development. On a workstation, virtual machine, or cloud instance, you can compile Jav…
From Java Monoliths to LangGraph Agents: What Transfers
I spent ten years building enterprise Java systems — a payments monolith broken into Spring Cloud microservices, banking applications, and currently a…
Anatomy of the Data Access Contract: Protect Your Domain from Framework Leaks (Chapter 3)
In almost every modern Java textbook, data persistence is introduced with a dangerous shortcut. You are told to create an interface, extend JpaReposit…
Parallel Selenium Tests in Java Without Thread-Safety Bugs
Your suite is green. Someone sets thread-count="4" to get CI under ten minutes, and now three tests fail. Re-run: two fail, and not the same two. Run …
Running Snyk on Real Legacy Java Code — The Full Unfiltered Results
Numbers are easy to skim. 10 Critical. 99 High. 59 Medium. 20 Low. 188 total. Those numbers appeared in the first article and they're striking — but t…
REST-style GraphQL — one line of Java handles filtering + sorting + pagination + stats + CSV export.
(Demo's in Chinese but you'll get the idea in 30 seconds) 👇 https://demo-bs.zhxu.cn/ A backend engineer's confession: you just wrote 100 lines of Java…
Testing Solon Web Apps with @SolonTest and HttpTester
Testing a Java web service is most valuable when it checks the application boundary—not just a controller method in isolation. Solon’s test suppor…
Kafka record headers in Stateful Functions: closing a five-year-old gap
Apache Stateful Functions never let a function see Kafka record headers, and never let it set them. Five years, no headers. StateFun Actors 3.4.0-KZM-…
Explain the Concept of "Convention over Configuration" in Spring Boot
If you've ever started a Java project, you probably know how much configuration is usually required. You need to configure XML files, register beans, …
Сколько стоит контроль над ИИ-агентом? Считаем экономику
В прошлой статье мы разбирали, как сделать работу ИИ-агента предсказуемее : зафиксировать требования в спецификации с помощью Specification-Driven Dev…
How I Built JWT Authentication in Spring Boot (Beginner-Friendly Guide)
How I Built JWT Authentication in Spring Boot (Beginner-Friendly Guide) Authentication is one of the first things every backend developer learns when …
Why Package Structures Won't Save Your Spring Boot Architecture (And How Maven Enforces It) (Chapter 1)
How We Turned Architectural Guidelines Into Compilation Errors Have you ever found yourself doing a Friday afternoon Code Review, only to discover tha…
301 duplicate IDs in the browser, 0 on the JVM: one real bug, end to end
A reader named Ryan left the sharpest comment on my last post. The gist: it was jargon-heavy, kept restating "you have to test the AI's output" in new…
I Ran From EJB2 to Spring. Then I Went Back. Here's What I Found.
The Ghost of Deployment Descriptors Past A few weeks ago I sat down to build a small clinic-appointment backend on WildFly, just to scratch an itch an…
Origami Framework: автоматизация тестирования на Java
Origami Framework — фреймворк для автоматизации тестирования на Java, созданный с целью упрощения построения тестовой архитектуры и ускорения процессо…
Как работать с ИИ-агентом предсказуемо: SDD, TDD, самопроверка и субагенты
ИИ-агент может читать и менять файлы, запускать сборку, тесты и команды терминала. Сам доступ к инструментам не гарантирует, что а…
AR And VR In Java: ARKit, ARCore, And A Virtual Room You Can Debug
This week's release post was about making the VM fast. Today's post is about pointing that VM at the real world. PR #5335 adds two new core packages: …
The bug that only showed up because my test was too fast
A couple hundred milliseconds cost me an hour, and the annoying part is I'd written the fix for it before I even had the bug. I was writing a Testcont…
Stop Claude Code Interface Blindness: Hook Eclipse JDT LS via MCP for AST-Aware Java Refactoring
Stop Claude Code Interface Blindness: Hook Eclipse JDT LS via MCP for AST-Aware Java Refactoring Claude Code is a beast in the terminal, but letting i…
Testing Keycloak SPIs with Testcontainers — the part every tutorial skips
Most "here's how to write a custom Keycloak authenticator" posts end at mvn package . You get a class that implements Authenticator , a factory, a MET…
How We Beat HotSpot Performance (By Cheating, But Not Like That)
No, we didn't cheat in the benchmark. At least I hope we didn't. Every optimization in this story was gated on bit identical output checksums against …
Getting Out of the Password Business
Our old authentication system logged users in with the OAuth2 client_credentials grant. If you know OAuth, you just winced. client_credentials exists …