Service · Legacy software migration · Brooklyn, NY
Your old system, rebuilt on a modern stack — with proof it behaves identically before you commit.
I migrate working legacy software (old PHP, VB6, .NET Framework, FileMaker/Access-era systems) to modern, maintainable stacks.
The translation is the easy part. What I sell is the parity guarantee: your old system’s behavior is characterized with tests first, and the new system doesn’t ship until it passes them.
Book the assessment — $2,500, credited toward your build.
- Lanes
- .NET Framework → .NET 8
Legacy PHP → modern PHP - Ship gate
- Passes tests built from your old system’s behavior
- First step
- $2,500 assessment, credited toward the build
- Pricing
- Fixed quotes. No build is quoted before the assessment
- NDA
- By default, before any code changes hands
01 · The problem
Your system works. That’s the problem — it works, everyone depends on it, and nobody wants to touch it.
The original developers are gone, the stack is end-of-life, hiring for it is impossible, and every agency quote starts at six figures and a year.
AI changed the economics of the translation itself. It did not change the risk: undocumented behavior, edge cases nobody wrote down, and the data migration are where rebuilds die. So this offer is built backwards from that risk.
02 · How it works
- 01
Paid assessment
$2,500 flat · credited in full toward the build if you proceed
Codebase inventory, business-logic map, risk list, fixed quote. No build is ever quoted before this.
- 02
Pilot module
Fixed price, from the assessment
One bounded module, migrated and parity-tested on your real code.
- 03
Full migration
Fixed per-module pricing
Ship gate for every module: the new code passes the characterization/parity test suite built from your old system’s actual behavior. Data migration and cutover are separate line items, never buried.
- 04
Care plan
$250 / month
Hosting, updates, small fixes after cutover. You own the code.
NDA by default, before any code changes hands.
03 · Lanes
- .NET Framework to .NET 8N°01
- Legacy PHP to modern PHP/frameworkN°02
Also servedVB6ColdFusionFileMaker/AccessOld Delphi
04 · Proof · client zero
VehicleDesk, the shop-management platform I built and run, is the modern rebuild of my own earlier system. Today it runs the front office of my own business, TK Modern Auto Repair in Brooklyn — booking, customer texts, estimates and follow-ups, parts costs, and the weekly close — on live data, every day.
- 11production releases between Oct 14 and Oct 20, 2026 (VehicleDesk)release log
- 250data models behind the product (VehicleDesk)Prisma schema
- ≈459klines of TypeScript and CSS across web, API, worker and marketing, tests excluded (VehicleDesk)line count
- N°01The rebuildVehicleDeskA CRM for mechanic shops that closes the books each week on live Shopmonkey data.
- N°04The business it runsTK Modern AutoWebsite and customer portal for my repair shop, TK Modern Auto in Brooklyn.
- N°05On the same shop’s phone lineAI ReceptionistA voice agent that answers real calls for TK Modern Auto, books arrival times and texts the details.
05 · Fit
For
Small and mid-size companies running a critical internal system on an old stack — too small for a $200k agency engagement, too important to leave rotting.
Not for
Mainframe/COBOL programs, or anyone who wants a quote without an assessment.
06 · Book
Book the assessment.
$2,500, credited toward your build.