Kostiantyn Ivanov

Experienced software engineer and technical lead with over 10 years of experience participating in development across various domains, including healthcare, banking, cybersecurity, accounting, etc. In terms of community activities, I have mentored students in Java and GoF patterns courses and have written technical articles for Baeldung and Medium.

Here's what I've written (so far):

Baeldung on Java

All
Artificial Intelligence (10)
Spring AI (6)
Data (4)
Persistence (3)
JPA (3)
Spring Security (2)
Spring Data (2)
Spring Boot (2)
JVM (2)
Testing (1)
Java String (1)
Java Streams (1)
Java Concurrency (1)
Java Array (1)
Java (1)
IDE (1)

Querydsl vs. JPA Criteria

Filed under JPA

Discover the differences and similarities between JPA Criteria and Querydsl.

Skip Select Before Insert in Spring Data JPA

Filed under Spring Data

Explore a few methods of skipping SELECT in logs and improve performance.

Storing UUID as Base64 String in Java

Filed under Java String

Learn how to store UUID as Base64 String using different approaches in Java.

Convert byte[] to Byte[] and Vice Versa in Java

Filed under Java Array

Learn several approaches to converting byte arrays to Byte arrays and vice versa in Java.

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