Role Summary
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 requests through client Git workflows.
- Document migration steps, breaking changes, and rollback procedures.
- Participate in sprint cadence — daily standups, sprint reviews, retrospectives.
Required Qualifications
- Bachelor's degree in Computer Science, Software Engineering, or related.
- 5+ years Java/Spring experience.
- Hands-on Spring Boot upgrades across multiple major versions.
- Strong with OpenRewrite, Spring Application Advisor, or equivalent automated migration tooling.
- Maven and Gradle build mastery.
- JUnit 5, Mockito, and integration testing experience.
- Spring Security, Spring Data, and Spring Cloud familiarity.
- Disciplined Git workflow — branching, PR reviews, conflict resolution.
- Fluent professional English.
Preferred / Nice to Have
- Spring Boot 3.x in production.
- Banking, financial services, or regulated-industry experience.
- OpenShift / Kubernetes deployment exposure.
- CI/CD pipeline familiarity (Jenkins, GitLab CI, Tekton, GitHub Actions).
- VMware Tanzu / Spring Runtime exposure.
Senior Spring / Java Migration Engineer • Lahore, Pakistan
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