Hey, I’m Robert-Jan de Dreu. A freelance software engineer, developing software since 2009. While using PHP and Javascript I build well structured and tested software.I enjoy working together with other software engineers to find the best solution possible. If you want to know what I’m capable off check out my skills.I’m located at Zeist, The Netherlands. Feel free to contact me if you need me for a freelance job or just to ask some questions. Note to recruiters: I would want to ask you not to call or email me directly but to follow me on Linkedin. I won't connect with you because I like to limit my connections to people I know. I'm getting a lot of calls and messages from you but if I have availability I will notify you so on Linkedin.While the list below is certainly not complete, it will give you a broad overview of the tools that I have experience with on a professional level. Feel free to give me a call, when you want to know if I have experience with a certain tool that is not listed.# Development methodologiesAgile/ScrumObject oriented programmingHexagonal architecture / Clean ArchitectureSOLID designTDD, BDD, DDDCQS, CQRSKnowledge about Event sourcing# PHP DevelopmentZend Certified EngineerSymfony Framework 2.x-6.x, Laminas, Kohana 3PHPunit, PHPSpec and BehatPHPMD, PHPCS, PHPlint, PHPCPD, Security CheckerComposer# JavaScriptBackbone, Marionette, Angular 1, Vue 3RequireJS, JQuery, UnderscoreJsNPM, Bower, Grunt, Webpack, ViteFront-end DevelopmentHTML5CSS/Less/SassTwitter Bootstrap# Persistence, Databases, QueuingPostgreSQL, MySQL, Oracle, RedisBeanstalkd# Deployment & ProvisioningDocker, Docker Compose, Docker Swarm, Vagrant, VirtualBoxCapistrano 3, AnsibleTravis CI, Bamboo, Ant, Make, Github Actions# Development & productivity toolsPHPStormGit, SVNGitHub, Gitlab, SlackJira, PivotalTracker, Trello# SecurityHTTPOAuth 2 (Experience with implementing Servers and Clients)OWASP# Human LanguagesDutch (primary language)English# Dev Ops & System AdministrationLinux Alpine/Ubuntu/Debian/Centos, WindowsApache, Nginx