Because of your use of commas and semi-colons, it's not exactly clear how the lists are organised, but assuming this:
- new technologies
- web development using varying javascript packages including:
- node.js;
- meteor.js;
- backbone.js,
- contributing to open source projects on github,
- and getting my hands deep into code.
...then — if you can't actually use bullet points like that — I would use the commas and semi-colons exactly the other way round. A semi-colon is a bigger break/divider than a comma.
I'm interested in: new technologies; web development using varying javascript packages including node.js, meteor.js and backbone.js; contributing to open source projects on github; and getting my hands deep into code.
Note that as well as using semi-colons, the colon introduces the whole list rather than the sub-list. And the sub-list includes an and and is entirely self-contained.