Challenge
Selling a small business in Germany is hard. If you own a garage or a coffee shop and you're ready to retire, you're too small for an investment bank to bother with. Amber Deals was built for those owners, and Florian Adomeit built the first version of it himself.
We spent about a year improving that app. Then Amber Deals acquired DUB, and one company was running four platforms at once.
Main challenges:
- 4 platforms to fold into 1: DUB on TYPO3, the Amber app on Bubble, the advisor directory on WordPress, the marketing site on Webflow
- 100,000+ accounts to migrate, many existing on more than one platform
- 10 years of listings, deals, contacts and billing history to move across
- 2 of the 4 platforms still in daily use while we moved them
- A target platform that changed mid-project
Solution
We ran the data migration. Florian's engineers built the new platform.
The data came out of DUB, the Bubble app and the advisor directory; the Webflow site was retired. Their team stayed close to the work the whole way, and that is what makes a migration this size hold together.
We focused on:
- A staged pipeline: extract, reconcile, then load into their new database
- 5 account situations to resolve, including two-account merges
- Deals, saved searches, listings, contacts and settings carried across
- Live subscriptions onto Stripe, contracts and terms untouched
- 2 full rehearsals on production data before the cutover
Results
Four platforms are one platform now, and it runs on dub.de. Amber Deals made the acquisition, but DUB is the name that survived it.
The cutover ran over a single weekend in July 2026, 6 months after the work began. When customers signed in, their deals, saved searches, listings and contacts were already there. Passwords were the one thing that couldn't come across, so everyone set a new one once.
Anatolii ran the migration, and he now sits inside their engineering team: the first time we've placed one of our developers inside a client's team.
Impact:
- 4 platforms consolidated into 1, live on dub.de
- 100,000+ accounts migrated
- Deals, saved searches, listings and contacts carried across
- Contracts and terms unchanged for every customer
- 1 developer embedded in their team, ongoing
