[Used to be in a similar situation as yours (have a LLB, became a software engineer), but not a lawyer in any capacity]
My understanding is that H1B rules allow 3 years of experience to count as one year of a relevant degree. So if you don't have any higher education in computing subjects, theoretically 12 years of relevant experience would meet the requirements.
That said even if you legally meet the requirements, non-typical cases often get mishandled due to administrative error. In my case, I applied for a L1 visa (which unlike H1B does not have degree requirements) but the officer somehow decided to apply H1B requirements anyway and rejected the application (he probably got confused). There was no feasible appeal process, so our lawyers advised me to go on a trip to another jurisdiction and re-apply. It worked out in the end, but the officer basically told me that we weren't supposed to shop around different consulates like that, but he did say he'd look up the law before deciding, presumably he wasn't able to find any legal basis for rejecting the application. (The process was pretty exciting!)
My understanding is that H1B rules allow 3 years of experience to count as one year of a relevant degree. So if you don't have any higher education in computing subjects, theoretically 12 years of relevant experience would meet the requirements.
That said even if you legally meet the requirements, non-typical cases often get mishandled due to administrative error. In my case, I applied for a L1 visa (which unlike H1B does not have degree requirements) but the officer somehow decided to apply H1B requirements anyway and rejected the application (he probably got confused). There was no feasible appeal process, so our lawyers advised me to go on a trip to another jurisdiction and re-apply. It worked out in the end, but the officer basically told me that we weren't supposed to shop around different consulates like that, but he did say he'd look up the law before deciding, presumably he wasn't able to find any legal basis for rejecting the application. (The process was pretty exciting!)