Data Scientist

Mendix, Rotterdam

We help enterprises achieve their digital goals

Duration: Full-Time

Mendix is on a mission to enable anyone in any organization – from the marketing coordinator to the software developer to the CEO – to create things that are transformational for their company.  We are fundamentally reinventing the way applications are created and we’re reinventing the future of software development.  Sounds ambitious, right?  We agree.

Not to brag, but nearly 4,000 organizations worldwide, including KLM, Medtronic, Merck, and Philips, rely on Mendix to build web and mobile applications.  Thousands of our customers use our platform to delight their clients and empower their employees. It’s no surprise that we’re a recognized Leader by Gartner and Forrester in a red-hot market expected to exceed $21 billion by 2022.  Ok, maybe we did want to brag a little.  But we’re proud of what we’ve accomplished…and…we’re humble enough to admit that we need you to make us even more effective.

As a Data Scientist in the DS unit, you will be faced with all the tricky internal business problems that can potentially be solved by data science. Such problems include but not limited to: tactic & strategic forecasting, optimal targeting, optimal control and controlled experiments (AB tests). This is a free role in the sense that you don't have a fixed responsibility field, and you don't dedicate to a specific department, rather that all Mendix internals are your potential stakeholders, you challenge existing processes & products based on your deep business & professional knowledge, you spot areas of improvement with a keen eye and proactively forming task forces to solve them.

In a typical end-to-end process you will need to collaborate with analysts, product managers, snr managers, engineers, researchers and most importantly your own teammates to research on the problem, build a model, solve it mathematically, productionize the result in reality and evaluate the business impact.

Among the process you are responsible for:

Research & prototype the mathematical models.
Explain key concepts to non-technical stakeholders.
If needed, Facilitate engineers for productionization.
Guide the AB testing process to avoid certain pitfalls.
When suitable, contribute to the related academic communities in the forms of papers or forum posts.
DS unit is a group of people with strong scientific background, rich practical experience and business knowledge. The unit focuses on extracting facts from data that provide research consulting services to all internal business stakeholders. The provided services are designed for optimization of existing business processes & product and exploration of futuristic ideas & solutions. Instead of insights, DS makes sure that all research results are immediately-actionable and their business impact be evaluated.


  • Ideally PhD or Master's degree in a quantitative discipline (e.g., Statistics, Bioinformatics, Econometrics, Computer Science, Mathematics).
  • Expertise in Bayesian statistics and modern statistical inference & learning techniques(e.g. variational methods, sampling methods).
  • Expertise in statistical software (e.g., R, Python, MATLAB).
  • Demonstrated skills in computational statistics and statistical machine learning techniques (such as publication records in the field of expertise, contribution to popular open-source repositories, winning of Kaggle competitions, cross-validated etc.).
  • Experience conducting A/B tests.
  • Experience articulating business questions and mathematical solutions to non-technical stakeholders.

Beneficial Requirements

  • Expertise in probabilistic graphical models and/or reinforcement learning.
  • Strong publication record in top venues in the field of expertise.
  • Experience with C/C++.


Our Guiding Principles

While we live on different continents, speak different languages, and work on different things, we are bound by our “MendixBlue” guiding principles.  Being “MendixBlue” means that you live the culture, and you consistently improve it as we grow.  It’s kind of a big deal.

We put the customer first.  Without our customers, we have no business.  So, if you act in the best interest of our customers, always…you belong here.

We think big. We work to have a meaningful, lasting impact on the world.  So, if you aim high and think long term…you belong here.

We innovate.  We want to be what happens next.  So, if you ask “what if?” and work to find a way or make one…you belong here. 

We nurture talent.  We look, not just at the sum of what an individual has done, but at the potential of who they can be.  So, if you’re up for learning from your failures…you belong here.

We hear every voice.  Inflated egos don’t last here, humility does.  So, if you share credit and ensure that the best ideas win – regardless of who they come from…you belong here.

We own it.  If something needs doing, we do it. So, if you focus on the outcome, and take initiative to get it done…you belong here.

We have fun.  We use laughter as a common language.  We can ask for help and we’re happy to give it.  So, if you find joy and purpose in what you do…you belong here.

Make your career at Mendix.

There are precious few jobs that let you create the future. But you’ll find one at Mendix. We are at a pivotal time in our company’s existence: where rapid growth meets stable funding.  This is the time for industrious people to raise their hands to solve the next generation of problems. Mendix is a place where ambitious people can thrive; where you can identify an issue, propose a solution, and build the structure to make it happen.

Important to know: Mendix is a Siemens business, which means we’re backed by the resources and stability of one of the world’s largest and most forward-looking enterprises. Think: job security.

Since our company was founded in 2005, our aim has been to create a great work environment for people at all stages in their careers. That’s why we are so pleased and honored that we were rated a top Cloud Computing Company to work for in 2019, based on feedback from our employees on Glassdoor. With offices in the Netherlands, the UK, Germany, and the US, (and more coming), we provide an international playground to truly impact the world through low-code.

About Mendix

About us We are creating an application platform that empowers people to build and continuously improve apps at unprecedented speed and scale. Who we are We’ve been in your shoes We know firsthand how hard it can be to quickly build software your users love, while maintaining the control you need. Having worked with hundreds of enterprise customers, we also understand how difficult it is to successfully execute a digital strategy. Our mission Our founders created Mendix to solve the biggest challenge in digital innovation: to empower IT and Business teams to collaborate like never before, while experiencing unmatched speed and control. These principles are architected into the very core of our platform, and they drive our relentless focus on your success. We are here to help We love helping you build breakthrough digital experiences, rejecting the conventional approach of merely doing the same things faster. We seek a long-term partnership with your team so we can help you deliver transformative value through applications. Our conviction—and your success—is powered by a diverse team of passionate and exceptional talent.

Want to learn more about Mendix? Visit Mendix's website.