Hello,
I have experience in many fields that You have mentioned. My primary skill is microcontroller programming using C (ST, Microchip, NXP) . Second one is schematic and PCB design (Altium) . Third one is soldering and assembling skills (SMD, BGA, etc.).
I work for a company that designs and manufactures smart electricity meters, communication modules and fiscal registers. I have skill in designing products, but also in mass manufacturing optimisation and SMT and troug hole mounting equipment. I also aid in design of injection moulds. I'm capable of Android app design but that is not skill that I can say I'm best at it, same for web application design in .net Framework.
I hope we can cooperate in the future.
Best regards,
Radojica