Avantsys

Capabilities

Legacy Application Management & Modernization

Two complementary capabilities: assuming responsibility for an existing application (continuity) and evolving it technically (modernization). Not every legacy application should be rewritten — the right strategy may be to stabilize, encapsulate, migrate in parts, or rebuild only where justified.

Application continuity

  • Technical onboarding
  • Codebase assessment
  • Environment reconstruction
  • Incident stabilization
  • Corrective and preventive maintenance
  • Dependency updates
  • Security remediation
  • Release management
  • Documentation recovery
  • Operational support

Modernization

  • Legacy assessment
  • Reverse engineering
  • Architecture recovery
  • Technical debt mapping
  • Framework and runtime upgrades
  • Java / Java EE modernization
  • Monolith stabilization
  • Modular monolith redesign
  • Selective service extraction
  • API enablement

Platform & operations

  • Containerization
  • Cloud readiness
  • Database modernization
  • User interface renewal
  • Authentication modernization
  • Observability
  • Automated testing recovery
  • CI/CD adoption
  • Security hardening

The right architecture depends on context

We don't assume every monolith should become microservices. Architecture choices are based on business scale, team maturity, operational needs, and measurable benefits.

  1. 1.Stabilize and document first
  2. 2.Encapsulate functionality through APIs
  3. 3.Replace modules gradually
  4. 4.Replatform infrastructure
  5. 5.Migrate databases where justified
  6. 6.Retain valuable proprietary systems

The goal is to protect business continuity and existing investments while the platform evolves.