Your Java monolith won't modernize itself
40% of enterprise Java applications are still stuck on-premise, running on 10-15 year old Java EE app servers (WebLogic, JBoss, GlassFish). Technical debt is exploding, talent is leaving, and AI integration is impossible. Nearvik modernizes your legacy Java applications to Spring Boot and Cloud Native, progressively, with no big bang, using the Strangler Fig pattern.
The pain points we solve
Legacy is expensive and blocks innovation.
- 75% of your IT budget goes to legacy maintenance
- Can't integrate AI — monolithic architectures trap data in silos
- Java EE/WebLogic developers are retiring — rare and expensive profiles
- Can't scale — an on-premise monolith doesn't handle load
- Catastrophic time-to-market — deploying a feature takes weeks
- Compliance at risk — GDPR, PCI-DSS, security audits
Our approach: Strangler Fig
We don't rewrite everything at once. We progressively strangle the monolith.
- Mapping — Analysis of the existing application: dependencies, modules, APIs, DB, integrations
- Prioritization — Identifying modules to modernize first
- Progressive extraction — Each module becomes a Spring Boot microservice
- Switchover — Progressive decommissioning of the monolith, risk-free
What we modernize
A complete technical transformation.
- Java EE (EJB, JPA/Hibernate, JMS, JNDI) → Spring Boot (Spring Data, Spring Security, Spring Cloud)
- WebLogic / JBoss / GlassFish → Embedded Tomcat / Docker containers
- Monolith → Microservices (Domain-Driven Design, event-driven)
- Legacy Ant/Maven → Modern CI/CD (GitHub Actions, GitLab CI, ArgoCD)
- On-premise → Kubernetes (AWS EKS, Azure AKS, GKE)
- Manual testing → Automated testing (JUnit 5, Testcontainers, contract testing)
- javax.* → jakarta.* (Jakarta EE namespace migration)
FAQ
How long does a Java legacy modernization take?
From 3 months (simple app) to 18 months (complex app portfolio). The Strangler Fig approach delivers value from the first weeks, not just at the end.
Can we keep using the app during modernization?
Yes, that's the Strangler Fig principle. The existing app keeps running while modules are extracted one by one. Users see no disruption.
Does AI really help with Java refactoring?
Yes. Claude Code excels at automated refactoring: javax→jakarta namespace migration, EJB to Spring service conversion, unit test generation, legacy code documentation. We save 30-50% time on mechanical refactoring tasks.