V2 built beside your live V1, one feature at a time, until every user has moved. $997/week.
soapnoteai.com
tenderpilot.ai
contentpal.app
fidder.app
A rewrite freezes new features for months. V2 beside V1 does not.
| Compared | Big-Bang Rewrite | V2 Beside V1 |
|---|---|---|
| New Features | Big-Bang Rewrite: Frozen until the new app launches | V2 Beside V1: Ship in V2 throughout, starting with what V1 can't host |
| V1 | Big-Bang Rewrite: Switched off on launch day | V2 Beside V1: Live and earning until the last user moves |
| Cutover | Big-Bang Rewrite: Everyone at once, and it partly works | V2 Beside V1: In batches, each user on their next sign-in |
| If Something Breaks | Big-Bang Rewrite: Nothing to fall back to | V2 Beside V1: One-click fallback to V1 on every screen |
| Main Cost | Big-Bang Rewrite: Months with nothing shipped | V2 Beside V1: Each change must work in V1, V2 and the shared backend |
You rank the pieces. I ship the top one, hidden until it's ready, about 72 hours on average.
In Progress
The first feature V1 can't host
Ranked by You
Shipped: shared sign-in and one backend, the bridge
It replaced a V1 that paid the bills for 3 years.
Founders with paying users on a V1 where each change takes longer.
Right For
Better Elsewhere
A simple, predictable and transparent process that eliminates development headaches.
After subscribing, you get a dedicated task board. It becomes your migration roadmap.
Week one: I read V1, map what depends on what and agree the migration order.
You set the priorities. I build the bridge, then V2 one task at a time.
You review each piece on the real app. I revise until you're satisfied.
You approve finished work. Once V2 has everything, the work turns to stability.
Users move and the code linking V1 and V2 comes out. You report issues anytime; I handle them first.
One weekly price for the whole move. No re-scoping if V1 is bigger than it looked.
A senior engineer building V2 while V1 keeps running.
Moving a working app onto a stack you can keep building on. For a founder, often a V1 from two years ago, or an AI-built app from six months ago.
Refactor if the stack can carry what's next: the code gets better as it's touched. If it can't, rebuild beside V1.
Yes. V1 stays live for the whole move, with no maintenance window.
Yes. V1 is the spec while it runs: when nobody remembers a behaviour, I check it there. V2 ships documented.
V1 can be static HTML, older React or Node.js. V2 lands on the default stack, or keeps your backend serving every client. Far from JavaScript, I say so in my first reply.
$997/week, pause or cancel anytime. The length follows how much V1 does.
Yes: one week. I read V1 and hand you the migration order and the rewrite-or-refactor answer. Keep going, or take the plan anywhere.
I revise until you're satisfied. V1 keeps running and the code is yours from day one, so stopping never leaves you without a product.
Fill in the project form, about a minute. I reply the next working day; if it fits, with a first plan and a call invite.
Jurij understand the core problem, insists on building the right experiences for the customers.
Kunal Modi
Founder @ SOAPNoteAI
Working with Jurij is an absolute joy, consistently exceeds expectations.
Janis Ozolins
Content Creator
Consistently delivered quality code in great time, very hard working & precise.
Bartosz Poźniak
CEO @ MyCointainer
The kind of engineer that every company on the planet would be lucky to have.
Hosam Mazawi
COO @ LemonUnit
App Modernization fits founders best: people building a product without a technical co-founder.
“No one makes the technical calls”: the calls and the code, every week.
“An idea nobody has clicked”: the core flow on a live link in one week, one payment.
“An idea, ready to test with paying users”: the smallest real product, launched in week 6.
“Ready to build the whole product”: launched in week 6, then built on real feedback.
“Phones, without three separate apps”: one app that installs from a link.
“An app stuck, unsafe, or left by its developer”: the bleeding stopped and a plan, in one paid week.
App Modernization
“A V1 that holds the product back”: V2 built beside it, until every user moves.
“A raise or a purchase on the calendar”: what diligence will find, ranked, in one paid week.
Not a founder? See what Varstatt offers you.
Sole proprietorship headquartered in Rzeszów, Poland. VAT ID: PL8133854722.
