Case Studies · Real Deliveries

From legacy code to modern .NET 10 — in days, not quarters.

Whether you're modernizing a decades-old platform or building a fresh enterprise app, the FlexBase pipeline collapses calendar quarters into working days. Two real engagements, one foundation.

The shift in pace

Same scope. Different timescale.

The point isn't an exact number — it's the order of magnitude.

A new entity (CRUD + events + UI)
Before 2–3 days
→
With FlexBase a few hours
A complete business module
Before 2–3 weeks
→
With FlexBase a few days
A legacy-app modernization
Before many months, large team
→
With FlexBase weeks, with one developer + AI
Database migration risk
Before schema rewrites, big-bang cutover
→
With FlexBase zero — same schema, new app
The challenge

What "legacy" really looks like

❌ The traditional rewrite

  • A team of developers, working for many months
  • Tribal knowledge lost in translation
  • Schema changes break downstream systems
  • Big-bang cutover with months of parallel running
  • Original legacy team needed throughout

✅ The FlexBase path

  • One developer with the AI agent, working in days
  • Source semantics extracted into versioned design artifacts
  • Zero database migration — same schema, new app
  • Module-by-module — strangler-fig replacement
  • Clean .NET 10 your team can read and own
How it played out

What changed for the team

1

Understood the legacy app

FlexBase made sense of the existing codebase quickly, so the team had a clear picture of every module before any rewrite work began.

2

Stood up the new app

A modern .NET application was in place within hours — built on enterprise patterns, mapped to the existing database, ready to extend.

3

Ported the business logic

Module by module, the working logic moved across — buildable, runnable, and ready for the team to refine the parts that mattered most.

4

Delivered the new experience

A polished web interface replaced the legacy screens — wired into the application and ready for the team's branding and UX polish.

Modules ported end-to-end in days by a single developer. Same scope, traditional rewrite estimate: many weeks for a multi-developer team.
Where it has been used

Two engagements, one foundation

🛒 Legacy Python e-commerce → .NET 10

A two-decade-old Python e-commerce platform. Business modules ported end-to-end onto .NET 10 with FlexBase, mapped against the original schema.

  • Per module: a few days, end-to-end
  • Per new entity: hours, not days
  • Team size: 1 developer + AI agent
  • Database migration: none — same schema, new app

� Enterprise calendar & booking platform

A greenfield enterprise scheduling and booking application built from scratch on FlexBase. Resource calendars, multi-timezone availability, recurring slots, conflict detection, and notifications — across web and mobile.

  • Per module: days from idea to working API + UI
  • Per new entity: hours for full CRUD & events
  • Team size: 1 developer for the core build-out
  • Surfaces: web & mobile from the same core
The point isn't an exact number. The point is the order of magnitude: features that used to take weeks now ship in days, and entities that took days now ship in hours.

Have a legacy app — or a fresh idea?

Both start with the same 4-step pipeline. Bring a BRD, a database, or the codebase itself.

See the 4 Steps → Why FlexBase