Hi Christian!
Perhaps your introduction would sound little better like this:

Good morning. My name is Christian and I have worked for <MY_Company> for six years. During this time I have developed web systems, client/server and stand-alone for Power Operations and Back Office in Italy.
I'm very glad to meet you.

I hope that helps!
-Georg

English presentation at work
Tomorrow I have to make a mini-presentation to my colleagues from England:

Good morning, I'm Cristian and I work in <MY_COMPANY> for six years.
In this years I have developed web systems, Client/Server and Stand-Alone for Power Operations and Back Office Italy.
I'm very glad to meet you.

English presentation at work

Tomorrow I have to make a mini-presentation to my colleagues from England:

Good morning, I'm Cristian and I work in <MY_COMPANY> for six years.
In this years I have developed web systems, Client/Server and Stand-Alone for Power Operations and Back Office Italy.
I'm very glad to meet you.

English presentation at work

Tomorrow I have to make a mini-presentation to my colleagues from England:

Good morning, I'm Cristian and I have worked at in <MY_COMPANY> for six years.
In this years  During this time I have developed web systems, both Client/Server and Stand-Alone, for Power Operations and Back Office Italy.
I'm very glad to meet you.

Good luck tomorrow!