About us

What we stand for

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We are the team behind Castor EDC (Electronic Data Capture), a web application that allows medical researchers to collect data for their clinical studies. We are one of the fastest growing HealthTech companies, having tripled our customer base in the last year. We are proud of the fact that our customers are our biggest growth engine. Once they use our product, they fall in love and tell their fellow researchers.

Our goal

Accelerate medical research

We want to accelerate medical research by unlocking the potential of every researcher. Starting with an easy to use and affordable EDC we want to help researchers throughout the entire medical research process. We believe that standardizing and reusing research datasets is key to meeting tomorrow’s healthcare challenges.

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"We are changing the way medical research is done, and with that, improving healthcare worldwide."

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Derk Arts, MD, PhD
Founder & CEO


Our EU Horizon 2020 Grant

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Our growth is accelerated by the fact that we have been awarded a €1.1M grant as part of the European Union Horizon 2020 SME (Small and Medium sized Enterprises) Instrument program. This allows us to expedite our growth plans and develop our products much faster than anticipated.

The media is starting to pick up on our story too:
Financieel DagbladEU StartupsTech.eunu.nl and ZorgVisie.

Our team

International and passionate about research

Our team consists of Healthcare and IT enthusiasts who are eager to contribute to the improvement of medical research. We have a diverse team, employing Dutch, Canadian, German, Swedish, Romanian, French and Indian staff. We briefly introduce everyone on our team page

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Castor life

How we work

We work in a healthy (low carb salad @ lunch, but also Fries Friday), efficient (no overhead!), and challenging environment. We have daily body breaks, a lego table (see right) and frequent meditation sessions. Working with us also means having time for other important things in life. We love tech and are always finding new productivity hacks (in Slack, IFTT integrations, marketing automation, etc) to allow us to start the Friday drinks early 😀

Our location

The wonderful city of Amsterdam

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Yes, we're biased, but Amsterdam is a great city to work and live in! Small village feel, but lots of stuff going on and plenty to see. Canals, museums, great parties, parks and the rest of Europe is only a plane ride away from European hub Schiphol Airport. Take a look at the Amsterdam Expat Centers top 10 reasons to love Amsterdam. Our office is not down-town, but the metro there takes 15 minutes.

We will sponsor your highly skilled migrant visum which gives you benefits such as:

  • The 30% ruling, which makes 30% of your income tax-free.
  • No need to do the Dutch driver test exam, you can use your old license
  • Extremely fast processing (join us in two weeks)
  • Your partner can work here and doesn't need to follow civic integration courses

Join us

No suitable vacancy? Send us an email at jobs@castoredc.com

Head of Sales
  • Amsterdam, Netherlands
Head of Marketing
  • Amsterdam, Netherlands
R Shiny Dashboard Engineer
  • Amsterdam, Netherlands
Customer Success Specialist
  • Amsterdam, Netherlands
Senior PHP Architect
  • Amsterdam, Netherlands
Sr. Backend Developer
  • Amsterdam, Netherlands
Junior / Medior Full stack developer
  • Amsterdam, Netherlands

Perks & Benefits

A selection of what we have to offer

  • Help redefine medical research
  • Lego playground in the office
  • Competitive pay
  • Bonus based on company goals
  • Visa sponsorship and 30% ruling
  • Free (healthy) lunch & snacks
  • Pension plan
  • All travel expenses covered
  • Stock options for high performers
  • 30 vacation days + 6 public holidays
  • Courses and conferences
  • Choose your own laptop
  • Friday drinks (and regular champagne)
  • Large office with space to work
  • Office shower (runs to the office!)


Paasheuvelweg 25, Wing 5D, Amsterdam

Castor HQ

Paasheuvelweg 25, Wing 5D
1105 BP, Amsterdam

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