Short answer in bold; click thru questions to long answers, if any.
- How much experience do you have with platform/language/package X?
~40 overall as an IT worker in 2015.
- How about references?
Click thru and DIY.
- How many interests/parties you can work with in paid work?
3 including myself as first person, the often implicit end consumer (market/society/clients/customers) as second, and the collective of workers I'm joining in production as third.
- On-Site Rate?
1000 per diem ($ or €).
- Will you take our test?
- Will you work without an advance?
Unless I'm considering a partnership with you, probably not, but exceptions are made where adoption of my projects is involved. The normal practice is half, though I generally only require a token amount, not half of a large project.