Sure, "just". I haven't done any coding for embedded controllers in over 15 years. I haven't done coding of any sort in over 10 years so would have to "relearn" all of that. I also don't have a 3D printer which would require some sort of CAD program to generate custom parts and since I have no experience with 3D printers or CAD programs, that's another learning curve hill I really don't want to climb.I could release the code and the PCB you would just have to do some basic soldering and adjust the settings for your rocket. Edit and need a 3d printer!
Besides, yours is TVC and I would want an aerodynamic controls so it works for the whole flight. Like I said, something commercially available, and I might be interested.