The Onegini team

Making your online business easy and safe

Ronald Kasteel


Experience (non) executive in the software and consulting industry. Ronald invested in several businesses after being CEO for twelve years at listed Ordina.  He was the co founder of Keylane, a successful International SaaS business for the pensions and insurance industry. 

When he is not working, Ronald loves to visit Italy to enjoy the food, culture and nature this country has to offer.

Jeroen Starrenburg

Founder & COO


Successfully bootstrapped companies and lead multiple IT projects to successful completion. Because of his Dutch heritage and passion for wines he founded the price comparison site for wines called

Denis Joannides

Founder & CSO


Successfully bootstrapped companies and helped many companies with translating business opportunities to IT solutions. Famous for his beef and pulled pork from the big green egg BBQ you can often find him outside, cooking meat to perfection.

Vincent Philipsen

Director of Sales


Seasoned entrepreneur who founded and sold multiple companies. Sales is in his DNA and he knows the playing field by heart. Loves everything in black, from his sneakers to his clothing and even his 'green' Tesla is black.

Stein Welberg

VP Engineering


Responsible for the technology vision and product development. Stein oversees the development teams but still loves to write code. As a water polo player and cyclist he plays well in a team but also on his own.


Development team

At Onegini we are proud to be backed by a brilliant team of developers who live and breath code. Although the general misconception is that they are almost like Rain Man but nothing can be further from the truth. They sure know how to socialize and party, work hard, play hard is their mantra. You are welcome to meet the team and hey if you are like them you can join them too!

Check out our job opportunities here....

Office screenshot

Get in touch

We're happy to talk