Senior Java Backend Engineer | Spring & Hibernate Monoliths | Performance & Production Debugging

Many teams focus on greenfield architectures.

My work focuses on systems where complexity already exists — years of business logic, legacy design decisions and real production constraints.

My approach is production-first and behavior-preserving.

Rather than advocating risky rewrites, I focus on making existing systems stable, predictable and performant again.

JVM behavior analysis

GC tuning and memory analysis

thread dumps and performance investigation

root cause analysis in live systems

Hibernate session management

transaction boundaries and transaction pathologies

SQL analysis and query optimization

resolving N+1 queries and ORM performance issues

diagnosing slow systems in production

resolving performance bottlenecks

stabilizing complex legacy systems

improving system predictability under load

Java backend development in Spring / Spring Boot environments

designing maintainable features inside large existing codebases

working within established teams and production systems

I bring the most value when a production system becomes unstable and requires calm, methodical debugging and root cause analysis.

Java

Spring / Spring Boot

Hibernate / JPA

SQL

REST APIs

JVM internals

Performance tuning

Legacy monolith architectures