My main professional activity is developing an Android app nowadays (and before that it was developing iOS apps) but that’s not a very exciting topic as you can find gazillions of guides on it on the web and most of the time it’s just… normal programming.
But every now and then I have to develop something rather obscure, like a server application based on the outdated SOAP protocol (in this year of 2020), or in this case, printing warehouse/product/shipping barcode labels from an Android app.