Many countries won't allow foreign first officers or have strict limits on them as F/O positions can be filled by locals eg Malaysia. India doesn't allow upgrades to Captain.
Experienced Commanders are a different matter as often there are very few locals in developing countries with the necessary hours, and big orders for aircraft which need start flying as soon as they arrive in country eg Indonesia.
Was this job advertised and no suitably qualified locals found ? With a minimum of CPL I/R M/E required for the right seat I doubt it it.