Matteo Vaccari — Matteo Vaccari

It is possible to write software that solves real business problems, cheaply and reliably. The recipe is well known, even though it's not easy to do.

I am an Extreme Programmer. I help individuals, teams and organization become more effective. I'm lucky to work as a developer for ThoughtWorks, mostly in the Milano area. I used to teach at Università dell'Insubria.

Current stuff

Twitter: @xpmatteo
Github repositories. You might be interested in the Birthday Greetings Kata, or the Open-Closed Principle Dojo. Or see how to do a frameworkless REST service.
My old Blog, and my newer stuff on Medium.
My presentations at various conferences.
A list of Italian XP User Groups and related communities.
I co-organize the Agile Coach Camp Italy.
I am a member of the Italian Agile Movement, and I helped organize several editions of the Italian Agile Day.
Me on Linkedin.

Older stuff

An unfinished book on TDD for Android, in collaboration with Carlo Bellettini.
Web Applications course (taught from 2003 to 2015)
Internet Technology and Applications course (taught from 2009 to 2013)
Operating Systems course (taught from 2000 to 2006)
My Ph.D. thesis on Calculational Derivation of Circuits

One of the reasons that TDD works is that the tests become kind of a universal client of your code, forcing your code to have a lot of surface area, so to speak, and not a lot of hidden depth or interactions. Again, this is valuable because code without hidden depth is easier to understand and easier to change. If writing tests becomes hard or slow, the tests are trying to tell you that your code is building up interior space where logic is hiding — you need to break the code apart to expose the logic to a unit test. Noel Rappin