Once, I did a small change on a security software, including a new feature, then I went to update servers in loco, on our clients office. I went there, and the

Once, I did a small change on a security software, including a new feature, then I went to update servers in loco, on our clients office. I went there, and the people of security (my users), once they discovered why I was there, they got very very happy, their eyes were brightening, and started to make calls to their colleagues to tell the great news. The feature I included on that version was very easy, did not took more than 2 hours to me to develop, but for them, it had a great value. That day was the first time I remember that I was doing a meaningful work, literally my software was improving people lives.