When growth is your constant, your tech partners can’t just be vendors—they need to think, build, and move like your own team. For Whoppah, Europe’s fast-growing secondhand interior marketplace, finding that partner made all the difference.

They didn’t just grow—they scaled 40x.

About the Client

Whoppah operates in 16 countries across Europe, offering a curated digital platform for secondhand interior treasures. At the helm is a CEO with a clear vision—and years of experience wrestling with the frustrations of outsourced development.

"As an entrepreneur, I have worked with a dozen different development agencies—often falling short on hiring highly capable engineers."

That struggle turned into an opportunity when Whoppah was introduced to Quantox Technology through a trusted mutual connection. What began as a straightforward collaboration soon grew into a deep partnership.

"Quantox always delivers quality, and everyone we worked with had good to great communication skills and was likable to work with as well. We have worked with several of their engineers already for years, as if they are part of our team."

The Challenge

Finding the right engineering talent had been a consistent roadblock for Whoppah. The company needed engineers who wouldn’t just code to spec, but who would embed within their team, think strategically, and drive innovation to support rapid scaling.

They needed partners who could keep pace with their ambition, delivering quality work while becoming a seamless extension of their internal team.

The Partnership

Whoppah teamed up with web, iOS, and DevOps engineers from Quantox to power their platform’s ongoing evolution. The collaboration model was refreshingly direct—working directly with engineers, with minimal bureaucracy, trusting in their expertise and professionalism.

"We are working directly with the engineers without actual involvement of the Quantox organization, which isn’t necessary either, as the engineers always deliver."

Clear, professional communication about team adjustments helped ensure smooth transitions and alignment.

"For as far as communication about team changes, we have always had a professional exchange with management to agree on adjustments needed."

Quantox engineers brought expertise across multiple fronts:

• Native iOS app development
• Web platform improvements
• Architectural solidity and DevOps enhancements

A pivotal moment was the complete refactor of Whoppah’s core web platform to Next.js.

"We have completely refactored our core web platform to Next.js in collaboration with engineers of Quantox successfully—speeding up our platform and enhancing conversion."

The Results

Whoppah doesn’t chase quick wins—they measure success over the long haul.

"We work with engineers for years, so do not judge on intermediate sprint releases."

The partnership with Quantox has been instrumental in Whoppah’s remarkable growth story.

"As Whoppah, we have grown 40x during the time that we worked with Quantox, which was the result of leadership at our head office and the execution of our complete organization, including several engineers of Quantox."

Whoppah became the go-to destination for buying and selling pre-owned interior items in Europe, now boasting the continent’s largest sales volume in its niche. This evolution of their product and platform translated into significant end-user satisfaction and platform traction.

Why It Worked

What sets this partnership apart is a balance of quality, flexibility, and trust.

"The price/quality relationship and flexibility of the management supporting necessary changes make Quantox an engineering partner to us."

Just as important, Whoppah emphasizes the need for cultural coherence and proper onboarding when working with external teams:

"We always advise extensive onboarding and continuous relationship development with external engineers to assure alignment and culture coherence."

What’s Next

Whoppah’s journey is far from over. Their ambition continues to drive innovation, fueled by an ongoing collaboration with Quantox.

"For as far as Whoppah is concerned, even though we have achieved great things already, our journey is strongly continued, partly in collaboration with Quantox."

Partner With Us

Working with Whoppah has been an inspiring experience. Their clear product vision, willingness to collaborate, and long-term roadmap helped us craft a scalable, robust solution that grows with them.

If you’re facing similar growth challenges and want a true engineering partner who thinks like part of your team—let’s talk.

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