This. To all the people who call this job post "silly", imagine how silly it is if a simple mistake of missing "-" like in "1-2 years" is overblown out of proportions and half the internet is discussing it. I've stumbled upon this "news" a few times during past 2 days. What a waste...

I assume it's on the front page because the majority of HN applicants have at one time or another seen job listings with impossible requirements as prerequisites. "Minimum 12 years Rust experience", etc.

The unstated half of this is that the honest programmer would say, "Well that's clearly impossible, I should either let them know or not apply," while the sleazy programmer tells the recruiter with a straight face that yes, he has the requisite 10 years' Swift experience, and gets the job.

If it requires two why isn't it considered "senior" It must be a typo of 1 year

Not sure why you are getting downvoted. Typo or a copy-paste from another job ad.

Its not like IBM team/dept is actually requiring this.

I clicked into this thinking oh maybe it had a long alpha/beta and IBM is doing something really interesting and needed someone with a deep history.