I'm Salesforce Developer.
Before working with Force.com platform I developed desktop apps using C# and Qt programming languages; web sites/apps using PHP, Flex, Java; and mobile apps using Java.
I took a part in developing various apps for Force.com platform. There were small projects like to track users requested trial, and medium ones like external service integration or huge data migration to Salesforce.com.
I'm pretty busy to make a beautiful portfolio but you can check my LinkedIn or follow me on Salesforce Stack Exchange.