Spring Boot - marmo.dev

A Modern Angular + Spring Boot Template for human and AI-Assisted Development

A practical Angular 22 and Spring Boot 4 starter template with Java 25, PostgreSQL, Flyway, OpenAPI, Docker, generated API clients, and conventions designed for both human and AI-assisted development.

Angular

Angular, Spring Boot, Kubernetes and CORS: Why we Don’t Need CORS in Production

Angular, Spring Boot, Kubernetes and CORS can get confusing fast. In this post, I explain when CORS actually applies, why my production setup does not need it, and how NGINX Ingress keeps frontend and backend on the same origin.

Angular

Real-Time Spring Boot and Angular: WebSockets in a Production Application

How MarMoFin uses Spring Boot, STOMP, SockJS and Angular to push job progress and private stock alerts through Kubernetes

Spring Boot

Hibernate 7.4: What's new for Spring Boot developers

Hibernate 7.4 introduces temporal entities, auditing, and safer pagination key upgrades for Spring Data JPA developers.

Java

Upgrading from Spring Boot 3 to Spring Boot 4 - Minor issues

A quick Spring Boot 4 migration diary: moved packages, split deps, and stricter tests.

Java

OCR Is Becoming Structured Data: Testing Mistral OCR 4 with Spring AI and Angular

A full-stack document intelligence demo using Angular, Spring Boot, Spring AI 2.0, and Mistral OCR 4 to extract markdown, layout blocks, tables, images, confidence signals, and structured JSON.

Java

Spring Boot 4.0 Null Safety: JSpecify Ends a Decade of Fragmentation?

Spring Boot 4.0 adopts JSpecify as its null annotation standard. Find out what changes, why it matters, and how it improves your code with four before/after examples.