let bundleIdentifier = Bundle.main.bundleIdentifier
            let configuration = URLSessionConfiguration.background(withIdentifier: bundleIdentifier!)
            configuration.timeoutIntervalForRequest = 200 // seconds
            configuration.timeoutIntervalForResource = 200
            self.alamoFireManager = Alamofire.SessionManager(configuration: configuration)

I am using above code setup alamofire for background configuration.
            alamoFireManager?.upload(data!, with: (router))
                .uploadProgress { progress in // main queue by default
                    print("Upload Progress: (progress.fractionCompleted)")
                }.validate()
                .responseJSON { [weak self] response in
}