Dear Sir,
in my last project I worked with ESP8266, relays(simulated with Leds), Raspberry Pi, Texas Instruments SensorTag, MQTT (HiveMQ installed on AWS EC2 machine) and MySQL DB (with Amazon RDS) for logs.
I used python scripts (web services, core backend on AWS EC2 machine) to manage the whole infrastructure.
I'm an experienced programmer (20 years) with a degree in Informatics (5 years at University of Salerno, Italy). Please note that I'm a C/C++, Objective-C, Python, perl, PHP, node-js, javascript, jquery expert programmer.
I developed in the last 6 years many iOS apps for the italian market (i.e. Pagine Gialle, Pagine Bianche, Tuttocittà, Giallo Emergenze and many small apps...)
and I have a deep knowledge of AWS, web services, docker technologies.
I believe to have the correct skills for this job. If you want I can prepare same prototype for you and we can reach together the goal.
Best regards
Giovanni