You could write a shell script to build, sign, and upload your app to iTunesConnect. (You mentioned in a comment you have 40 apps to upload, if that's the case you should definitely, definitely, automate the whole process like this)
I won't cover building and signing (plenty online how to do this via shell script/terminal commands), but uploading to iTunes connect uploading isn't as well known about or documented.
/Applications/Xcode.app/Contents/Applications/Application\ Loader.app/Contents/Frameworks/ITunesSoftwareService.framework/Versions/A/Support/altool --upload-app -f "signed .ipa file" -t ios -u username -p password
Your script could in succession for each app you need to upload. Or heck, you could spawn a different instance for each app and run them all at the same time (don't know how iTunes Connect would handle that though).