Hi,
I am a Full stack developer in Microsoft technologies.
I have extensively worked with electronic invoice integration. I have integrated DIAN successfully for both .net and PHP. You can check the reviews in my profile to confirm this.
My area of expertise is web application development (asp.Net web forms, MVC, classic ASP), web services (SOAP & RESTFul), MySql & Sql Server as back end (through stored procedures).
I have 6 years of experience as a full time software developer.
Kindly contact me, lets discuss your requirements.