I did front-end dev for a company for just over 9 1/2 years, it was my first job out of university so came into it feeling incredibly self-conscious anyway. I guess I struggled with that for the best part of 7 years, which combined with feeling like an impostor was great fun. I'd managed to begin to ignore feelings of inadequacy by about year 8, despite moving from Junior to Senior, so using any tangible evidence should have got away from that way of thinking a long time ago.
Cut to today - I was made redundant from that company after 9 1/2 years in March and had to find something new. I'd been working in niche software and found myself with no "current" knowledge and a whole bunch of industry specific know-how, which in the job market seemed incredibly useless.
After what felt like an eternity of interviews, and re-learning a lot of the academic side of programming (as that was what the crux of almost all interviews was) I was finally offered a new role somewhere else. Ironically, my superior here already noticed I was suffering from impostor syndrome within a week and oddly enough embracing it has made it a whole lot easier to deal with.
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