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I’m an independent IT consultant and entrepreneur in the Internet and software business. I’m interested in design, enterprise applications, web apps and SaaS products. I design and develop business solutions and applications. I help companies in terms of software quality and knowledge transfer, e.g. with Angular and Spring Boot.

“Java Is Fast. Your Code Might Not Be.” by Jonathan Vogel

Recently, AWS developer advocate Jonathan Vogel published this first article of a planned three-part series on Java performance optimisation: Java Is Fast. Your Code Might Not Be. Jonathan describes how he optimised an order-processing application by addressing and fixing common Java performance anti-patterns such as string concatenation and stream iteration inside loops or autoboxing in hot paths.

Continuations: The Magic Behind Virtual Threads in Java by Balkrishna Rawool @ Spring I/O 2024

Sunday March 29th, 2026 by Bjoern in Enterprise Software, Software

Spring Boot Code Structure: Package by Layer vs Package by Feature by Dan Vega

Sunday March 15th, 2026 by Bjoern in Enterprise Software, Software

Spring Boot 4 & Jackson – A Migration Guide

One of the more significant library updates that come with Spring Boot 4 is Jackson 3, which is the default JSON processing library for Spring Boot. If you're using Jackson heavily in your application, particularly when it comes to customising its behaviour, chances are you'll need to adapt your code to the new version To help you with this transition, software engineer and Spring developer advocate Dan Vega has published this article on the subject of Jackson 3 in Spring Boot 4: JsonMapper, ...

Sunday March 8th, 2026 by Bjoern in Enterprise Software, Software