Can I publish my app in my Developer Account?

Yes! You can publish your app in your developer account, wheter it's for the App Store or Google Play.

The way of doing that depends on the platforms your app targets:

Android: When sending the app to publishing, on the field "Additional Information", let us know that you want to publish it on your account and we will send you an APK consisting of the app file.
iOS: On iOS the apps are published on your account by default.
Android y iOS: When sending the app to publishing, on the field "Additional Information", let us know that you want to publish it on your account and we will get in touch for coordinating the publication of your app.