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.
> Ethereum - Frontier/Solidity and IBM Hyperledger/Fabric<p>translation: IBM talked them into a pilot program using Hyperledger Fabric, which IIRC uses the smart contracts functionality from Ethereum.
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.