Hello, I would be more than happy to help you out! (:
I have years of experience in Swift, as well as using Firebase Services. Firebase is my all time favorite database, authentification and storage service. I have used Firebase in about 11 iOS Applications so far, and have developed a deep understanding of the service.
Please feel free to message me, I would be more than happy to show you examples of my work.
Thank You,
Alexander Lester