I can't in any way see how this ad means they are looking for 'Ethereum developers' other than it being a desired skill. Please refrain from posting misleading titles to articles.
You have to understand that a lot of people is expecting to get rich with cryptos, so they need to create a lot of hype, even if that means fabricating false news from a job posting.
BofA's been messing around with talk of various blockchainy projects for a while now, though little visible result beyond overexcited articles in the Bitcoin blogs.
5 years of Ethereum development experience is longer than Ethereum has been around. These boilerplate Wanted ads won't attract developers with bleeding-edge skills.