Have a Java or Spring backend problem that's blocking development or production?

I’ll investigate and fix one focused backend issue in an existing Java/Spring application.

Java exceptions and application errors

Spring configuration problems

REST API bugs

API integration failures

Database and SQL issues

Data mapping or transformation bugs

Authentication/configuration problems

Application startup failures

Unexpected backend behavior

Performance problems with a clearly identifiable endpoint or query

Docker or environment issues affecting a Java service

Root-cause analysis I’ll reproduce or investigate the issue and trace it to the underlying application, configuration, integration, or database problem.

Code-level fix For issues within scope, I’ll implement the fix or provide a clean patch you can integrate.

Testing and validation I’ll test the affected behavior and verify that the fix addresses the original problem without introducing an obvious regression.

Technical handoff You’ll receive a concise explanation of the root cause, changes made, and any follow-up recommendations.

This service covers one focused backend issue requiring approximately 4 hours or less of engineering work.

It isn't intended for major feature development, full application rewrites, or large architectural changes. If the problem turns out to require significantly more work, I’ll stop at the agreed scope and provide options for continuing as a separate project.

Repository access or the relevant source files

A description of the expected and actual behavior

Error messages, logs, or stack traces

Steps to reproduce the problem when available

Relevant API, database, or environment information

I’m a backend and cloud software engineer with 6+ years of professional experience building and maintaining Java/Spring systems.

My background includes REST APIs, enterprise integrations, SQL and relational databases, cloud infrastructure, Linux environments, and production troubleshooting.

I’ll approach your issue the same way I would an engineering problem on a production team: reproduce it, isolate the cause, implement the smallest reliable fix, and explain what changed.