Senior Spring / Java Migration EngineerLahore, Pakistan

Role Summary

About the job Senior Spring / Java Migration Engineer ByteCrew Technologies is hiring a Senior Spring / Java Migration Engineer for its Spring Framework Modernisation Practice. The role is hands‑on — executing upgrades, fixing breaking changes, writing regression tests, and shipping migrated code into client repositories on sprint cadence.

Key Responsibilities

• Execute Spring Boot 2.x 3.x and Spring Framework 5 6 upgrades across client application portfolios.
• Run OpenRewrite recipes for automated code transformation; debug recipe behaviour.
• Identify and remediate breaking changes (jakarta.* namespace, removed/deprecated APIs).
• Refactor Maven and Gradle build files, dependency versions, and lock files.
• Write and run integration and regression tests using JUnit 5 and Mockito.
• Address Spring Security CVEs and apply enterprise security patches.
• Commit, code‑review, and ship migration pull ...