Our Team

We are located in Amsterdam and Delft in the Netherlands and our team members each specialize in different disciplines. There is, however, one important thing that connects us: we all love spreadsheets! That’s why we created PerfectXL. For better spreadsheets. All over the world.

Team PerfectXL

Mateo Mol

Mateo Mol - Director :: Team PerfectXL


Mateo has always been crazy about numbers and about games. He studied econometrics and politics. For years, he was a publisher and founder of several online and print media. With Infotron, he found the optimal combination of doing business and playing with numbers.

Mateo on LinkedIn

Felienne Hermans

Felienne Hermans - Founder :: Team PerfectXL

Founder of Infotron

Felienne is Assistant Professor at the Delft University of Technology, where she researches end-user programming. She founded Infotron while she was working on her PhD. Felienne just loves spreadsheets, but also Lego. And she is head of the TU Delft Spreadsheet Lab.

Felienne on LinkedIn

Joeri van Veen

Joeri van Veen - Developer :: Team PerfectXL


Joeri studied Media Technology at Hogeschool Utrecht. He is driven, analytical, creative and he has an eye for detail. Programming and photography are right up his alley. He joined Infotron during his graduation and now works full time unifying technology, design and business needs.

Joeri on LinkedIn

Jucelino Santos Fortes

Jucelino Santos Fortes - Developer :: Team PerfectXL


Jucelino grew up with games and three competitive brothers. They loved games so much that he started developing games during his childhood. He studied Applied Mathematics at the Hague University and TU Delft, because his lust for solving puzzles had exceeded games. He just recently started working for Infotron and he’s enjoying every moment.

Willem-Jan Meerkerk

Software Developer

Willem-Jan, who recently graduated with an MSc from TU Delft, is enthusiastic about bringing his knowledge of Computer Science into practice. In 2019 he successfully completed graduation project on ‘Comparing Spreadsheets’ at Infotron. Now he has joined the team as a software developer, he loves the challenge of developing intelligent solutions for complex problems.

Arie van Deursen

Arie van Deursen - Co-founder :: Team PerfectXL

Co-Founder Infotron

Arie was Felienne’s professor and supervisor during her PhD and was closely involved in the creation of Infotron, Previously, he successfully co-founded the Software Improvement Group. Despite his professorship, Arie has always been the smart programmer that he wanted to be when he was young.

Arie on LinkedIn

Anne Jellema

Anne Jellema - Online Strategist :: Team PerfectXL

Online Strategist

Anne is an independent online strategist and co-owner of JB Promotions Online Advertising & Social Media. She helps Infotron by being responsible for the online presence and online authority of PerfectXL within its niche.

Anne on LinkedIn

Joel Steendam

Marketing & Sales

Joel works full time at Infotron and is responsible for all minutia as related to sales and marketing, he grew up in China, and studied Business Marketing in the United States. Joel has a love for people and building relationships, he is excited to begin building a network of customers through his relational capabilities and though he just started he already feels fully integrated into the team.

Joel op LinkedIn

Michiel Broomans

Marketing Consultant

Michiel is a sales driven marketer, and is a natural team builder. He assists PerfectXL in developing the correct product and marketing strategy and he is responsible for the optimization of the marketing and sales branch of infotron.

PerfectXL is in the perfect stage to be rolled out, it is ready to be of use in businesses across the Netherlands and beyond. It is a fantastic opportunity to be involved in this process”, -Michiel.

Michiel on LinkedIn

Sohon Roy

Sohon Roy - Developer :: Team PerfectXL


Sohon is pursuing a PhD in Software Engineering at Delft University of Technology. He pushes forward the cutting edge technology used within PerfectXL by formulating, implementing, and evaluating new research ideas. In addition, Sohon also enjoys devoting his skills towards the continuous improvement and enhancement of the PerfectXL application.

Sohon on LinkedIn

Walther Bakker

Mateo Mol - Director :: Team PerfectXL

Sales Director

Walther has had a long and successful history in Sales. In 1996 he started the first internet CD shop in the Netherlands. After that he has been involved in a variety of American and Dutch IT related companies. When he has free time he tends to invest it in photography, specifically nature photography.

Walther on LinkedIn

Lajla Brinkhoff

Lajla Brinkhoff - Online Marketeer :: Team PerfectXL

Online Marketer

Lajla is an independent online marketeer and co-owner of JB Promotions Online Advertising & Social Media. She takes care of the online campaigns for PerfectXL that run on social media and Adwords. 

Lajla on LinkedIn