How could the following twit be explained:
Tech companies, y'all are sleeping on me. I'm available to hire now and that won't always be the case. Whoever gets me is getting a great team member.
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"Sleep on someone" is an informal phrase; some might consider it a slang. It basically means to ignore someone for whatever reason.
sleep on (someone or something) (The Free Dictionary)
(slang) To fail to appreciate or ignore the significance of someone or something. Typically used as an imperative.
Note this is different from "sleep on it", which means
to think more about something overnight and make a decision about it later (Merriam-Webster)