How to confirm participation in the project?

Question

Career in IT

In vacancies I sometimes see the phrase "the presence of confirmed projects." How are projects approved? How to do it, for example, a mobile developer?

Answer 1

Leave contact information for the manager.
Have edits in the repository made from your account.
Be on the list of developers of software that is usually not hidden.
Just to be aware of what kind of software it is and how it works, balabols are cracked at times by ignorance of the most simple, but special things for a particular project.

Answer 2

List yourself in the credits

Answer 3

letter of recommendation

Answer 4

Either they take your word for it or they don't. However, it is enough to write the field of activity and the specifics of the project. Usually, the NDA does not prohibit disclosure of project details after it has been launched. But check with former employers, suddenly this is not the case.