I've worked on pretty cool projects since then at other companies. And, it isn't the only interview I've ever had like that, it is more common than I would like

I've worked on pretty cool projects since then at other companies. And, it isn't the only interview I've ever had like that, it is more common than I would like. It is sometimes very hard for me to prove myself. Even though I've had plenty of jobs in the past with proof I can code and with good references. I sometimes feel like I'm an imposter, even while kicking ass on a project.