Ahmet Yilmaz came to Berlin from Istanbul in 2017 and found work fixing phones in a small Kreuzberg basement workshop owned by a Turkish-German community association. For three years, he fixed 15–20 devices per day, earned €2,200 per month, and watched the shop owner pocket €18,000–€25,000 in monthly revenue.
"I did all the repairs," he says. "He had the business. I had only the skill."
In 2023, he opened his own shop. In Berlin-Mitte — the city center where tech startups, international firms, and Berlin's growing professional class converge.
The German Standard from Day One
Ahmet knew German customers intimately. He knew they expected proper documentation more than almost any customers in Europe. They wanted a Rechnung with the USt-IdNr. They wanted a warranty card. They wanted a systematic business that would still be there in 12 months if something went wrong.
He set up RepairCoreX before opening his doors.
"In Germany, you do not build trust with charm," he says. "You build trust with documentation and reliability. RepairCoreX gave me the documentation system from day one. Every repair ticketed, every invoice compliant, every warranty tracked."
Month by Month
Month 1: €28,000 revenue. Berlin's Mitte district had many of the city's best-earning professionals who had been searching for a repair shop they could trust.
"I had customers who drove 25 minutes specifically because their colleague said I gave a proper Garantieschein," he says.
Month 3: €52,000. Month 6: €74,000 — hired a second technician. Month 12: €89,000.
The Mittelstand Account
At month 8, Ahmet won a service contract with a Berlin-based Mittelstand firm — a mid-size logistics company with 60 employees. Monthly device repairs: €4,000–€8,000. The contract was awarded on the basis of his documentation standard and RepairCoreX's ability to produce monthly consolidated invoices with full repair history.
"The HR manager said: 'You are the first repair shop that has sent us a proper business invoice,'" Ahmet says. "That is the standard of the German professional market."
Today
Ahmet earns €15,000–€18,000 monthly net. He employs 2 technicians and has become one of Berlin-Mitte's highest-rated repair shops on Google Maps.
"Deutschland liebt Qualität und Dokumentation," he says. "RepairCoreX liefert beides."