Sander Breukink, Developer in Eindhoven, Netherlands
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Sander Breukink

Verified Expert  in Engineering

Machine Learning Developer

Eindhoven, Netherlands
Toptal Member Since
June 8, 2017

Sander is a developer who's currently living in the wonderful city of Eindhoven. He's been building websites since he was 14 years old, and at the time it was just a hobby, but over the years, he's worked for several companies and has gotten a significant amount of professional experience with website development.



Preferred Environment

SourceTree, PhpStorm

The most amazing...

...thing I've worked on was supply management software for web shops that prevented unnecessarily high inventory levels and lost sales.

Work Experience

Data Scientist

2017 - 2019
Future Facts
  • Built and maintained data lakes.
  • Performed clustering on incoming complaints.
  • Created dashboards on public data.
  • Improved an intelligent email campaign.
Technologies: Amazon Web Services (AWS), Java, Python

Graduate intern

2017 - 2017
  • Analyzed data the medical cost of the Dutch population using R.
  • Applied several machine learning techniques to predict future costs in R.
  • Worked with private, sensitive data and created a full report on the research done while not violating these rules.
  • Wrote a full report with advice to the Dutch government on how to improve their existing models to make more accurate predictions on future healthcare costs on an individual level.
Technologies: R


2016 - 2017
  • Created several APIs within the Laravel framework as a back-end developer.
  • Wrote complex queries combining data of 5+ different tables in PostgreSQL.
  • Created a dashboard with front-end languages to visualize data in a user-friendly way.
Technologies: PHP, PostgreSQL, Laravel

Web Developer

2007 - 2017
Freelance Work
  • Developed several hobby projects: websites for associations where I'm a member of and school projects over the years. In most of these projects, I was the only person responsible which meant I did both the back-end, front-end, and overall structure.
  • Translated website ideas into a plan that's actionable and can be done efficiently by understanding the goals of a website.
  • Created entire websites from just a couple of ideas using HTML, CSS, JavaScript, PHP, and MySQL.
Technologies: jQuery, MySQL, PHP, JavaScript, CSS, HTML

Creative Developer

2014 - 2015
  • Maintained several WordPress websites—making sure that all updates are installed and fix all bugs that appeared as a consequence of these updates.
  • Built new websites with the customer's wishes in mind.
  • Developed and edited WordPress plugins in such a way that they fitted the needs of each specific website.
  • Built and edited WordPress templates to fit the customer's needs.
  • Made the existing websites responsive; this meant being responsible for the code and the design on tablets and smartphones.
Technologies: WordPress, Drupal, JavaScript, CSS, Sass, HTML, MySQL, PHP


2014 - 2014
  • Worked on web development with AJAX—making the websites more responsive than just plain JavaScript, HTML, and CSS would do.
  • Read data from streaming APIs and did real-time computations on this data.
  • Read, wrote, and edited data on other servers using external API calls.
  • Performed sentiment analysis on short texts.
  • Analyzed social media data, extracted keywords, and performed matching with other data based on these keywords.
Technologies: JavaScript, CSS, HTML, Ajax

Tempo Team Live
Via Future Facts, I worked for Randstad on a project called Tempo Team Live. In this project, we linked online job vacancies to eligible candidates in the Randstad database and automatically sent potential customers emails where we briefly introduce the top three candidates.

All of this runs in the AWS cloud infrastructure of Randstad and my main tasks were scaling, improving efficiency, automating manual tasks, and keeping everything stable. For this project, the team I was part of won the DDMA award that won the best email campaign in the Netherlands.

Data Engineer PostNL

Via Future Facts, I worked as a data engineer at PostNL; I was part of the team responsible for creating the AWS data lake. Tasks involved making sure the data was available to the right persons within the right time window, the data was in the correct format, the data was transferred and stored in a secure matter, keeping costs low and document everything in an internal wiki.

Brickster Website
This is a website that I made for a Dutch building maintainer. The texts, logo, and some sketches were delivered to me which then I translated them into the website it has become.

Holi Run Website

A website for a Holi Run event that was held in 2014.

HLD Drôle Website

I built a website for a student fraternity.

Cafe de Bruine Pij
This is a website for a Dutch cafe; the goal was mostly to create an ambient website with a limited amount of content.

Optiply Interface
I created a dashboard for managing inventory for webshops. It displays information on service levels, expected sales, and future orders. The dashboard itself is not publically available but is based on a template that is given in the link. During this project, I was responsible for creating most of the APIs and transforming a template into a functioning dashboard.


JavaScript, R, CSS, HTML, PHP, Sass, Python, Scala, Java


jQuery, REST APIs


Git, SourceTree, Eclipse IDE, PhpStorm, Adobe Photoshop


Amazon Web Services (AWS), WordPress, Drupal


PostgreSQL, MySQL






Machine Learning, Ajax, htaccess

2017 - 2018

AWS Certified Solutions Architect Associate in AWS

AWS - Global

2016 - 2017

Master of Science Degree in Data Science

Eindhoven University of Technology - Eindhoven, Netherlands

2015 - 2016

Master of Science Degree in Data Science

Université Nice Sophia Antipolis - Nice, France

2010 - 2015

Bachelor of Science Degree in Computer Science

Eindhoven University of Technology - Eindhoven, Netherlands


AWS Certified Solutions Architect Associate


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