Application Migration & Stack Modernization

Legacy systems don't fail all at once — they slow you down gradually. Features take longer to build. Performance degrades. Recruiting developers for an outdated stack becomes harder. Solviba migrates web applications from legacy technologies to modern, maintainable stacks — React, TypeScript, Node.js, Supabase, and PostgreSQL — without the big-bang rewrites that create months of instability.

Migration Assessment & Risk Planning

Before migrating anything, we document what exists — the current architecture, data model, integration points, and the features that must continue working throughout the process. We identify the highest-risk areas, define a migration strategy that minimizes user impact, and establish rollback plans for each phase.

• Legacy system architecture documentation and dependency mapping

• Data migration strategy with integrity validation

• Parallel running strategy for zero-downtime cutover

• Feature parity checklist and acceptance testing plan

Incremental Migration — Not a Big-Bang Rewrite

We migrate in phases — moving one module or subsystem at a time while the rest of the application continues to function. This approach dramatically reduces risk: at any point, most of the system is known-good, and the scope of what could go wrong is contained. Users experience continuity, not a sudden switch to an unfamiliar system.

Database Migration & Data Integrity

Data migrations are the highest-risk part of any modernization effort. We design and execute database migrations with full validation scripts that confirm record counts, referential integrity, and data transformations before the old system is decommissioned. Data is never migrated once and assumed correct — it's verified.

Modern Stack Setup & Developer Experience

The end state of a migration engagement is a codebase that's a pleasure to work in: TypeScript throughout, consistent component patterns, a CI/CD pipeline, proper environment separation, and a deployment workflow that doesn't require manual steps. The modernized application is faster to build on, easier to hire for, and cheaper to maintain.