TECHNOLOGY UPGRADE · JAVA
From Java 7 to Java 21 / 25 — without stopping the business.
Legacy Java keeps running until it suddenly can't. We upgrade critical Java 7 applications to modern long-term-support releases with automated testing, staged releases and a clear rollback path.
WHY MODERNIZE NOW
The cost of waiting keeps rising.
- Public updates for Java 7 ended years ago — security patches stop
- Libraries and frameworks no longer support old Java
- Older runtimes cost more to run and are slower
- Fewer engineers want to maintain legacy stacks
- Long-term-support releases with ongoing security patches
- Virtual threads and modern concurrency for scale
- Records, pattern matching and cleaner, safer code
- Current frameworks — Spring Boot 3 and Jakarta EE
OUR MIGRATION APPROACH
Six stages. Zero guesswork.
Incremental, tested and reversible — the business keeps running while the platform changes underneath it.
- 01Assess
Scan code and dependencies to map removed APIs, risky libraries and test coverage.
- 02Plan
Choose Java 21 or 25, the framework path and a staged upgrade route.
- 03Upgrade
Update build tooling, libraries and code — including javax to jakarta migration.
- 04Test
Automated regression, integration and performance testing at every step.
- 05Release
Containerised, CI/CD-driven rollout with monitoring and rollback ready.
- 06Optimise
Adopt modern features where they cut cost, complexity or latency.
WHAT WE COVER
The full migration scope.
Ant, Maven or Gradle brought to current versions
Spring / Spring Boot, Hibernate and related libraries
Namespace migration for Jakarta EE and Spring Boot 3
Replace APIs dropped or locked down since Java 7
Application servers, containers and JVM tuning
Modern cryptography, TLS and dependency patching
Add automated tests where coverage is thin
Repeatable builds, Docker images and pipelines
Java 21·Java 25·Spring Boot 3·Jakarta EE·Maven·Gradle·OpenRewrite·JUnit 5·Docker
Still running on Java 7?
Let's plan a safe path forward.
Share where you are today. We'll respond with clear questions, an honest view of fit and a practical next step.
Plan your upgrade