Over 25+ years of engineering experience. I'm particularly good at prototype development and light manufacturing. I am an American -- educated in Computer Engineering from an abet accredited university. I am located in Asia for a competitive advantage. I work with the ESP-IDF (no Arduino). I'm also competent with PICF18 processors but I haven't used them in about 2 years. I have a history in Windows Application development, but lean today towards dotNet MAUI for multi-cross platform app development.
One of the areas of concern today in firmware is that we have a lot of developers (or people who think they are) shoving library code together without a deep understand of how things work. You can make a lot of short term progress -- only to produce a product you don't understand with mysterious problems. Holistic system integration is probably one of the more important attributes of really solid firmware.
If you really want to know who is on the other side -- I always suggest to any client that they should put me in front of an expert for a technical interview. I am happy to take a video conference call and handle probing questions from a professor in Computer Science/Engineering, Electrical Engineering, or Physics. Anyone one of these folks should be able to judge my background and experience.