Sep 2018 – Present · 7 yrs 7 mos · Brooklyn, New York, United States · Remote

• Building Home Assistant and other products and tools necessary to achieve our Open Home vision: a smart home that cares about privacy, choice and durability.

Apr 2018 – Apr 2019 · 1 yr · Greater New York City Area

• Work on Home Assistant.

Oct 2015 – Apr 2018 · 2 yrs 6 mos · Greater San Diego Area

• Kick ass, create cool stuff.

Oct 2014 – Oct 2015 · 1 yr · Greater San Diego Area

• Design and built new features using React.js, ES2015 and Nuclear JS (Flux architecture)
• Develop APIs in a Ruby on Rails application using test-driven development.
• Ensure that all my code is covered by unit, integration, Jest and Selenium tests.
• Built open-source style checker bot Farcy

Sep 2013 – Present · 12 yrs 7 mos

• I started and lead the Home Assistant development. Home Assistant is an open source home automation platform that puts privacy and local control first. It is the worlds biggest open source home automation project. It is used by tens of thousands of users and over a thousand developers worldwide.

Jan 2012 – Feb 2015 · 3 yrs 1 mo · Netherlands

• Co-founded a non-profit and volunteer-only foundation to encourage people to donate money to charities by making it easy and fun.
• Responsible for the technical implementation.
• Collected over €15.000 for charities.

Jan 2012 – Jul 2014 · 2 yrs 6 mos · Greater San Diego Area

• Responsible for high performance ETL of 10 terabytes of medical records for a Medicaid and Medicare fraud detection solution.
• Efforts resulted in an Informatica PowerCenter 9 development cycle time reduction from 6 months to 1 week.
• Designing and creating processes in Informatica PowerCenter 9 to extract, load and transform data in an efficient way.
• Developing Python scripts to automatically organize and validate incoming data and trigger loads.

May 2010 – Feb 2011 · 9 mos · Amsterdam Area, Netherlands

• Responsible for the technical part of a project to help the government share their data.
• Developed a mobile application for Windows Phone 7 in C#.
• Developed various features for an ASP.NET MVC platform hosted on Windows Azure.

Oct 2009 – Dec 2012 · 3 yrs 2 mos

• Responsible for development and finances of our two-person company.
• Developing a web application to create virtual tours using JavaScript, Closure Tools, Google Street View API, Python, Flask and Google App Engine.
• Developed an Android application to track drinking behavior.
• Developed a mobile application for the University of Twente to guide fresh men using jQuery Mobile.
• Developed a video streaming website for a TV series using Drupal, jQuery and PHP.
• Created a social-media based recruiting product for an international recruiting company.
• Maintaining IT infrastructure for a Java servlet-based web application hosted on Tomcat.

Mar 2008 – Feb 2009 · 11 mos

• Responsible for representing a union of student associations towards the university and the local government.
• Efforts resulted in better contacts at the local government and better opportunities with the university.
• Influenced legislation within the university to maintain our level of benefits and established strong relationships with key figures.

Sep 2006 – Dec 2011 · 5 yrs 3 mos · Enschede Area, Netherlands

• Responsible for leading a team of 6 developers and 2 designers building an online learning environment for high school students.
• Efforts resulted in a modern fresh of the learning environment with improved usability, an interactive user experience and a growing user base.
• Managed the product strategy as part of the product management team.
• Designed and developed a new frontend using Google Web Toolkit (3 years).
• Developed a new backend and frontend with Java, Spring MVC 3 and jQuery (2 years).

Jul 2005 – Sep 2005 · 2 mos

• As a Flash Animator I created interactive animations for the Online Leeromgeving. An e-learning system focused on high school students.

Sep 2006 – Aug 2007 · 11 mos

• Responsible for the human resources and logistics of the bar of student association AEGEE-Enschede with a yearly revenue of €100 000.
• Efforts resulted in an improved planning system for the employees and better stock management.
• Built a web application so people could track their spending in the pub in PHP.

Oct 2003 – Jan 2004 · 3 mos

• My job consisted of writing the first version of MijnAlbum.nl that was released to the public in February 2004. MijnAlbum.nl is a website to allow people to store their photos in online albums and share them with friends and family. I am responsible for all the development of the first version.