I am a professional Software and Electrical Engineer, with a polytechnical masters degree and an all round interest in many subjects. I have worked professionally at a number of software companies and generally try not to edit pages on those companies or their products (in accordance with WP:COI).
I have made edits not under this account, including a large number of edits attributed to my IP addresses at various times, but I think that is OK, as each contribution is written to stand on its own (article contributions are generally cited or mere editorial changes such as formatting).