I experienced this. Due to various undiagnosed mental health issues I ended up with a serious record in the UK - a total of 15 charges, all computer related.
Due to the clear lack of malicious intent I didn't serve any time, but did get shackled with: 12 months suspended for 12 months; 10 years on the sex offenders register; 7 years sexual harm prevention order; and 5 years of something else I can't remember.
Every computer I touch - whilst in the UK - should have "monitoring" software installed, which pretty much ruled out any office job, let alone tech.
So after 2 failed suicide attempts and a stay in hospital I decided to completely reinvent myself and start from scratch. Time to hit the big reset button. Legally I have to reveal my convictions ahead of signing a contract in the UK. I got frog-marched out of several buildings by security after the interviews were terminated immediately when I revealed my convictions. I was basically unemployable in the UK and decided to leave and never return. Even after the 10 years is up I am still required to declare "spent convictions" for 5/6 years. This would take me close to my 50th birthday until I no longer have to say anything - 15 years from conviction date.
It took 1 year to "create" a new identity, including complete change of name, severing any connection with friends, and faking an employment history.
I moved abroad with my new identity and hoped for the best... and so far have had an incredibly successful career (post-conviction), and the one thing which has driven me is being good enough that IF my employer learns of my past, they will weigh up what I offer them vs. what I have done in my past.
I remain forever optimistic because _I have to_ . There is no other option.