I need a developer who have good experience on :
1. Data extraction from difficult site with ssl encryption, cookies, in future might be captcha.
2. Server maintainance ( things like scale up instances )
This task is not regular work. But you only have to work when structure of the site changes or some databse gets down or traffic increase ( this usually happens in few months).
I would make a contract with and pay on per month basis.
The only requirement is you have to be prompt when some problem happen.