Hi,
I am an Electronics and computer science engineer, I have experience working with various prototyping boards, Raspberry Pi, Arduino, mbed (ARM proto board)... as well as developing custom PCBs, you can find some of my projects on my portfolio.
IoT systems are my forte, I can show you an example smart city iot system I worked on in the past upon request as an example, I would also recommend not going with QT, because of the problems you'll get if you ever want to turn it into a commercial product someday, don't worry, there are alternatives to it
I pride myself on ensuring that the customer is satisfied with the quality of the work and strive to sustain good communication and complete the project (5-star reviews/ 100% completion rate)
Looking forward to working with you.
Regards,
Nabil