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The right code unlocks secure platform payments

Build the infrastructure behind Europe’s largest marketplaces. At OPP, your code doesn’t sit in a backlog. It moves real money, for millions of users, every single day.

Tech at OPP

When you buy or sell on a marketplace or a platform, money doesn’t just move from A to B. It needs to be verified, split, held, monitored and paid out securely. The right code unlocks that complexity.

OPP powers the payment infrastructure behind platforms like nature.house, Marktplaats and IKEA. From onboarding sellers and handling KYC to managing high-volume payouts, our systems keep marketplace commerce running. As we expand across Europe, our platform evolves to new markets, regulations and payment flows.

We built the entire platform in-house. No patchwork solutions. No black boxes. When something needs to change, you change it. You’ll work alongside the engineers who built the foundation 15 years ago and evolve it for the next generation of marketplace payments.

At Online Payment Platform you’re not maintaining legacy software. You’re evolving critical financial infrastructure.

Where your code makes an impact

From complex KYC flows to high-volume payout systems, our teams build the infrastructure that keeps platforms compliant, scalable and secure. Explore some of our clients and see what you could be working on next.

Built for developers

Our development teams are located at the tech-only office in the centre of Delft, built for focus and surrounded by good coffee. Our work is structured across four focused teams, each taking ownership of clearly defined domains:

Team 1

Fund Management, Reporting Tool and PayPal ITU

Team 2

Payments, Services and Risk & Compliance

Team 3

Interfaces and KYC & Onboarding

Team 4

Finance Application

Delft
Berlin
London
Valencia

Become part of our team

Data Engineer
  • Delft, Zuid-Holland, Netherlands
Tech
Product Manager
  • Delft, Zuid-Holland, Netherlands
Tech
Senior Backend Developer (PHP)
  • Delft, Zuid-Holland, Netherlands
Tech
Senior DevOps Engineer
  • Delft, Zuid-Holland, Netherlands
Tech
Site Reliability Engineer (SRE)
  • Delft, Zuid-Holland, Netherlands
Tech

Want to learn more about our projects?  

Take charge?

There's a lot more to OPP. Learn more about our mission and team values.

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