Hello...
I have read your requirement..,
(Android APP development )
my team members are fully customize android app developer in Android studio (kotlin) , his experience in BLE communication , WIFI(host) data passing experience ,in json ,api , and string data passing knowledge , hi's expert in apk development.
(Embedded )
i can provide to your as per requrment LED Controlling using ESP32,ESP 8266 or as per your requiremnt . i have experience in RGB led pixel set uisng NEO pixel , PWM controll (Brigtness adjust)and FAst switching as per your requiremnt ,
(Hardware design)
And Also 4 Layer PCB design expert in Proteous 8.9 (SP0), and fully expert in any hardware design
Regards
dixit dayani