Service

Legacy Web Application Modernization

Legacy systems can contain years of valuable business knowledge while becoming difficult to test, change, and extend. I help improve existing applications without discarding working functionality or rushing into unnecessary rewrites.

What This Service Includes

• Legacy system assessment: Examine architecture, dependencies, code organization, and technical debt to prioritize improvements.
• Incremental refactoring: Plan small, manageable changes that reduce risk and keep existing functionality available.
• Architecture restructuring: Introduce clear boundaries using Domain-Driven Design, Clean Architecture, and separation of concerns where appropriate.
• Technology modernization: Refactor and upgrade .NET backend and web frontend components according to system needs.
• Data conversion and migration: Design conversion workflows with integrity checks and business-data preservation.
• Testing and reliability: Introduce or strengthen unit and integration tests to protect critical behavior during changes.

Relevant Experience

I introduced a phased refactoring roadmap that avoided a full project rewrite and saved budget. I extracted bounded contexts and applied vertical Clean Architecture to improve extensibility. I also developed a parallel data conversion pipeline using MySQL, SQL Server, Entity Framework, and Azure Storage that preserved all legacy data.

My Approach

Modernization should be driven by business value. I assess the existing domain, identify the highest-impact weaknesses, and introduce changes gradually while protecting the behavior that users depend on.

Let's Work Together

If your legacy application is becoming costly to maintain or difficult to extend, I can help create and execute a practical modernization plan.