The whitepaper explains this thoroughly and to what extent we can use blockchain in order to revolutionise traditional recruitment methods - https://jobchain.co/JobChain_Whitepaper_.pdf

In short:
We can create an immutable source of candidate history
Automated recruitment process between Employer and Employee using a smart contract
Incentivise a smoother recruitment process e.g. people showing up for interviews
Global transactions for hiring from/to abroad

There's more and it's all explained in much more detail in the Whitepaper, hope this helps