Unknown JSON fields in Java REST clients: JSON-B, Jackson, Quarkus, and Spring Boot
What happens when a JSON response contains more fields than your DTO declares? The answer depends on your JSON provider. A look at the...
Rustam Mehmandarov
Java Champion 
Google Dev Expert Docker Captain 
Oracle ACE Pro Senior Technologist & Architect.
Community Builder. Speaker.
I build complex, business-critical solutions that work in practice, and speak globally about cloud, architecture, AI, and security.
What I Do
Software Development & Architecture Advisory
Helping teams design and build business-critical systems – cloud architecture, modernization, secure platforms, and delivery pipelines that scale and last.
Speaking, Keynotes,
Workshops & Training
Engaging talks and keynotes worldwide on cloud, architecture, AI, and security. Hands-on workshops and deep-dive training.
Developer Community Work
Lead organiser of Google Developer Group (GDG) Cloud Oslo. Working with GDGs and JUGs worldwide to grow and connect developer communities.
Latest Blog Posts
Jakarta EL: safer rules without handwritten predicate parsers
A practical look at Jakarta Expression Language as a small in-process policy engine – replacing a handwritten predicate parser with `jakarta.el.ELProcessor`, then hardening evaluation...
Sane API error handling with RFC 9457 Problem Details in Jakarta EE
A practical look at RFC 9457 Problem Details for HTTP APIs in Jakarta EE – a hand-made ProblemDetail + ExceptionMapper approach, the Zalando Problem...
