Jens Carlén - Web, Mobile & Desktop development

Profile
Record

Hi there! Welcome to my page. My name is Jens and I'm a freelance developer based in Stockholm, Sweden.

What I do
- HTML/CSS
  I develop dynamic web sites using standards as HTML, CSS and Javascript. These sites most often use techniques such as XML, JSON, HAML & SASS
- Flex/Flash
  RIA development with Actionscript, mxml or just Flash.
- iPhone/iPad
  iOS development both using Titanium Appcelerator and native Objective-C
- Java
  Web development with Spring, Hibernate, EJB, JSP & Wicket. Desktop development with Swing. Deployment with Maven & Ant.
- Javascript
  I prefer to develop javascript with the wonderful jQuery library. However I aslo found Prototype and Mootools useful and nice to work with.
- Linux/Unix
  My deployment environment of choice is Ubuntu Linux. I've also used other linux distribution such as Cent OS. When it comes to web servers I prefer nginx, even though Apache Httpd can have it's benifits.
- PHP
  Web development with the standard LAMP-stack. I also been customizing Wordpress, including developing plugins.
- Python
  Desktop development under Windows using Tkinter. Web development with Django.
- Ruby (on Rails)
  Web development with Rails, Padriono & Sinatra. Deployment with Passenger (or Mongrel or Thin) and nginx or Apache Httpd. BDD with Rspec & Cucumber or plain TDD with TestUnit
- SQL
  Database design. Experience with MySQL, PostgreSQL & SQLite.
What I did
- Forskningsstudier
  
  Forskningstudier is a Ruby on Rails web site developed to conduct polls for scientific research.
- Gideon
  
  Gideon is a platform for processing news articles. Its mainly written in Java, using technologies such as Spring, Swing and Tomcat. The project also involved a great deal of user studies.
- Soundcloud
  
  Soundcloud is a sound sharing platform developed by sound & music loving engineers in Berlin, Germany. The platform is mainly build using Ruby on Rails. I was one of the main developers in the original team. My main responsibility came to be javascript development with the jQuery framework
- Shortpath
  
  Shortpath is the backend system for Maze Media Group. It is build using Python and the web framework Django.
- Searchuz
  
  Searchuz was a targeted search marketing platform built in PHP used by partners of Maze Media Group.
- uTales
  
  uTales is a self publishing platform for child books. The techniques used are Ruby on Rails, Flex and Appcelerator Titanium for the iPhone & iPad apps. My role was CTO and lead developer.
Education
Royal Institute of Technology (KTH)
Master of Science in Media Technology
- Fields: Sound & Computer Science
- Master Thesis: 'Test Driven Javascript Development For Web Applications'