leonard ceo explains mission of praxa sense

Afi is the missing link for the next generation hospital at home.

Leonard Moonen,
Founder Praxa Sense

Our story

Graduation Project of Leonard

I'm Leonard Moonen, founder of Praxa Sense. During my graduation project at the faculty of Industrial Design Engineering at Delft University of Technology, I created Afi. I graduated from CardioLab, which is a consortium of TU Delft, Philips Design and the Dutch Heart Foundation (Hartstichting). The first version of Afi was a device located on the upper arm, which could collect PPG data using a green LED.

First prototype of Afi made during Leonard's graduation
From graduation to start-up

Afi was presented at the Dutch Design Week 2017 and received media attention from i.e., BNR, Radio-West, Nationale Zorggids. Consequently, Leonard decided to register Praxa Sense B.V. as a company.

“Praxa Sense refers to Praxagoras of Kos, an ancient Greek who was the first to use the pulsation of the heart for diagnostic purposes.”

Praxa Sense was accepted in the EIT Health Validation Programme 2018, run by Trinity College Dublin. At this point, Liselotte Stolk joined Praxa Sense as a co-founder.

After Afi was validated in Dublin, we were accepted to participate in the YES!Delft Accelerator Programme. YES!Delft offered us an office space, which is where we are located today. YES!Delft is recognized as the second-best business incubator worldwide according to UBI Global. After the programme, Pourya Omidi joined Praxa Sense as co-founder.


Left: Liselotte and Leonard in Dublin. Right: Leonard, Liselotte and Pourya.

Where we are now

In 2020, we developed the first fully operational version of Afi. The final adjustments are now being made and machine learning algorithms are developed. In the following years, we aim to receive Medical CE certification, and will be performing several clinical research studies.

Meet our team

  • Leonard Moonen

    Leonard Moonen

    Founder & CEO
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    Liselotte Stolk

    Co-founder & COO
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    Marnix Kraus

  • Cyprien Kraaijpoel

    Cyprien Kraaijpoel

    Quality Assurance Manager
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    Gerard Simons

    Machine Learning Engineer
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    Joep van de Klundert

    UX & Service Designer
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    Enzo Claveau

    Fullstack Developer
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    Cas Bramer

    Sensor Development Engineer
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    Maaike Delemarre

    Office Manager & Management Assistant
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    Annefleur Kluft

    Technical Physician
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    Emma Joziasse

    Product Designer
  • Iris Moes

    Iris Moes

    Project Assistant
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    Jaap van Brussel

    Photonics Engineer
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    Violeta Chatalbasheva

    Intern Machine Learning Engineering
  • Luuk Bolhuis

    Luuk Bolhuis

    Intern Technical Medicine
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    Elena van Breukelen

    Intern Photonics Engineering
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    Brian van Winden

    Intern Technical Medicine
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    Peter Tait

    Intern UX Design
  • Mr Bean thumbs up

    Carlijn Oerlemans

    Intern Technical Medicine
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    Anibal Luciano Pastinante

    Photonics Engineer
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Join us!

Do you want to help improve people's health by innovative technology? Praxa Sense is the right place for you. We are an ambitious, friendly and informal team. We would love to get to know you!

  • Ambitious young team
  • Friendly and informal organisation
  • Open and transparent communication
  • Horizontal company culture
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