Willem Stuursma-Ruwen's Email Addresses & Phone Numbers

My passion is making software that doesn't suck. I do that by applying my usability knowledge to make a great product and by making the code clear and expressive as to keep it maintainable. I can work as easily on a complex backend as on the Javascript at the front end. Since the entire web stack works...

My passion is making software that doesn't suck. I do that by applying my usability knowledge to make a great product and by making the code clear and expressive as to keep it maintainable. I can work as easily on a complex backend as on the Javascript at the front end. Since the entire web stack works together, it comes as a great benefit to be able to work on it at all levels. I have a deep knowledge of the possibilities and limitations of web technologies. I can bridge the gap between the user and the developer. Furthermore, I am a usability specialist with an academic background in Psychology and in Human-Machine Interaction. During my student years, I have had a seat at the board of my student organization Cleopatra A.S.G. (which is a full time position) during which I developed organizational and leader skills. Whilst working at iWink B.V., I had the opportunity to apply these skills in leading our internal development team. At Hyves, I played the role of Scrum master and have been responsible for making several new hires productive. At Mollie, I am responsible for making sure our code can move at a fast pace and of course for implementing new products. Specialties: Backend development (PHP 5.5, Python, Facebook's HPHP and XHP), MySQL. NoSQL data stores (memcached, Redis, Sphinx). Creating scalable, secure and well performing web sites. I further specialize in security: preventing injections of all sorts, making sure sensitive data is stored securely and also preventing social engineering. I have extensive experience with test-driven design (TDD) for PHP using PHPUnit, and with integration testing using Selenium.Head of Development @ Mollie is a technology-based company processing payments for more then 30.000 clients as a collecting payment service provider (CPSP) with the payment methods such as iDEAL, paysafecard, Bancontact/Mister Cash, Bitcoin, SEPA bank transfer, SOFORT Banking and credit card. At Molie I spend my time about evenly on development and taking care of the development department. Additional responsibilities include hiring, dividing work, prioritizing management requests and whatever else comes along. From July 2014 to Present (1 year 6 months) Senior Developer @ Mollie is a technology-based company processing payments for more then 30.000 clients as a collecting payment service provider (CPSP) with the payment methods such as iDEAL, paysafecard, Bancontact/Mister Cash, Bitcoin, SEPA bank transfer, SOFORT Banking and credit card. At Mollie I work on application development, API design, application security and optimizing code quality by professionalizing our development process. For example, I set up continuous integration with Jenkins for all our projects. I also maintain – together with my colleagues – our open source plugins for web shops such as OpenCart and Magento on Github. Finally, I provide tier-2 support to our customers who have trouble implementing our APIs. From March 2012 to June 2014 (2 years 4 months) Core Developer @ Hyves is the leading social networking site in the Netherlands with over 10,5 million members. Hyves reaches 57% of all Dutch people and generates over 6,7 billion page views per month. I have worked on various products such as the social guide, group chat and the mobile web site. Furthermore, I have taken the role of deploymeister, in which I was responsible for deploying new versions of our web site to our hundreds of web servers. At Hyves, I also have worked on our mobile web site and mobile applications for iPhone and iPad (both native and Phonegap based apps). From March 2011 to February 2012 (1 year) Junior Core Developer @ Hyves is the leading social networking site in the Netherlands with over 10,5 million members. Hyves reaches 57% of all Dutch people and generates over 6,7 billion page views per month. At Hyves I worked in the ticket team (solving bugs and adding small features) and on Hyvesense, Hyves' self-service advertizing product. From September 2010 to February 2011 (6 months) Intern Interaction Designer @ Interaction design and usability testing for a single project (part-time) From June 2010 to August 2010 (3 months) Graduate at Interactive Banking department @ At ABN AMRO, I worked on my master thesis as part of my internship (full-time). I conducted a study on the relation between web page performance and conversion. I measured client-perceived loading delays at the ABN AMRO web site, and conducted an experiment in order to find out how loading delays influence web site usage (abandonment rate, pageviews per visitor and evaluation). I presented my results to the Internet management team. If you are interested in the results from my thesis, you can read about it on my web site or contact me to receive a copy of my thesis (in English). From February 2010 to August 2010 (7 months) Volunteer at Usability Week 2009 Conference @ Volunteerd at the Usability Week 2009 Conference in Berlin, November 2009. Light duties such as checking attendance, helping with logistics. From November 2009 to November 2009 (1 month) Web developer @ At iWink I was responsible for the technical part behind most of the web sites we created. I mostly worked on our internal framework and CMS (content management system), which we used for nearly all our clients and products. My specialities include performance optimization, database optimization, character sets, integration with web services and Javascript. On most projects I worked alone, but sometimes I led a small team to work on a project. Technologies used included PHP 5, MySQL 5, Smarty, Zend Framework, many PEAR packages, Prototype and Script.aculo.us, squid, and memcached. I worked part-time at iWink (0.5 fte), combining working with studying. From May 2005 to August 2009 (4 years 4 months) Volunteer at User Experience 2008 Conference @ Volunteerd at the User Experience 2008 Conference in Amsterdam, November 2008. Light duties such as checking attendance, helping with logistics. From November 2008 to November 2008 (1 month) Msc, Human Machine Interaction @ University of Groningen From 2007 to 2010 Msc, Theory and History of Psychology @ University of Groningen From 2007 to 2009 Bsc, Psychology @ University of Groningen From 2003 to 2007 Willem Stuursma-Ruwen is skilled in: Software Development, Web Development, Programming, PHP, OOP, MySQL, JavaScript, jQuery, CSS, Web Services, Front-end, Usability, Software Engineering, Design Patterns, Web Applications