From side project to a product real estate operators actually use.
Hi, I'm Yann. I'm a software engineer and real estate investor based in Umea, Sweden. I built Property Data Labs to solve my own data headaches, and now it helps thousands of others do the same.
The Origin Story
My journey into building tools for real estate started back in 2021 with a small project called Real Estate Buddy. It was a simple, free browser extension designed to calculate mortgage repayments directly on Zillow and other real estate sites. I built it because I was tired of switching tabs to run basic numbers.
That project taught me two things: first, that real estate professionals are starving for better data tools; and second, that I loved building them. It didn't track users, it was free, and it just worked. That philosophy stuck with me.
The Pivot to Data
By late 2022, I realized the bigger problem wasn't just calculation-it was extraction. Investors and agents were spending hours manually copy-pasting listing data into spreadsheets. I founded Property Data Labs (formerly Zillow Data Exporter) to automate this.
What started as a tool to help me analyze rental markets quickly grew into a platform used by thousands. The goal was simple: turn hours of manual entry into seconds of automated work.
Live Impact Metrics
Engineering Background
Before going full-time on Property Data Labs, I spent years as a software engineer honing my skills in scalable systems.
- Back End Developer at Tise (now part of eBay) (2021-2024)
Built scalable backend services using TypeScript and AWS for a sustainable fashion marketplace. - Software Engineer at ActivePipe (2020-2021)
Specialized in data imports and marketing automation for real estate agents. - Full Stack Engineer at Genie Solutions (now Magentus) (2016-2020)
Developed cloud and desktop practice management software for medical professionals.
I also cut my teeth founding other projects like TesolHub (a job portal for teachers) and JobCompanion. Some worked, some didn't, but every line of code led me here.
Why I Keep Building
Unlike massive data corporations, I'm an engineer who actually invests in real estate. I read every support email. If you have a feature request, you're talking directly to the person who writes the code. This tight feedback loop is why Property Data Labs improves every single week.
Get in touch
I'm always happy to chat about real estate, code, or feature ideas.