Hello,
I'am a fan of project like yours as a raspberry and Alexa (avs and sdk) enthusiast.
I have the experience and skills on Rpi, linux, python, GPIO, flask server , flask_ask , AWS Lambda ,....
I have tested on my material (Rpi 3b, echot dot with single led using python faumo library) like this project .
I'm available to discuss about it .
Regards.
Zak.