Imposter Syndrome, a fancy term for a lack of confidence, is real. And it is likely to stick with you even if you're an experienced developer.
But, as you'll soon find out, that is perfectly fine.
Like any complex skill, confidence can be learned and earned.
Seeing people struggle with this, and the pain it causes (for example when entering or even before submitting a code review), we produced the following training to start framing this fear in the right way.