iPhone and Android app developer

We are looking for a developer with the experience on native iPhone and Android apps developing with modern interface and backend development.
Also, must have experience on Google admob and knows how to integrate admob sdk in the apps and implementing the admob’s banners into the apps.
Must have experience with Google firebase to host and integrate the apps and backend there.
The job will start as casual and will lead to full time based on the outcome and achievements of your first 3 months of your employment..
Full time job will involve visiting our Australia, Sydney head office at least once a year, all visas, accommodation and travel cost will be paid for by the company including the staying cost..