I will upgrade your spring boot app to the latest spring boot and java version

Still on Spring Boot 2.x or an old Java version? Security fixes stop and libraries drop support, so the upgrade gets harder every month.

I upgrade your existing Spring Boot app to a current Spring Boot and Java LTS version, fix what the upgrade breaks, and deliver a working pull request with passing tests. I'm a senior Java/Spring backend engineer and combine automated tooling with manual review.

What's covered:

- Java upgrade (8/11 to 17 or 21, or 21 to 25)

- Spring Boot upgrade (2.x to 3.x, or 3.x to 4.0)

- javax to jakarta migration

- Dependency, config and deprecated API fixes

- Build, Dockerfile and CI updates (Premium)

- Short upgrade notes (Standard and Premium)

How it works: you send repo access, I confirm scope, work on a separate branch and send a pull request.

Not included: new features, business logic changes, production deployment, or bugs unrelated to the upgrade. No guarantee that every third-party library has a compatible version; I flag blockers early.

Requirement: your project builds and has some tests.