Hello... I have read your requirement you pixhawk4 drone sw for nitro heli quad. Lets discus details in chat.
I have master degree in Mechatronics Electronics Engineering I have 5 years experience in dealing with hobby products like Planes, drones, quadcopters and helli etc. I have experience in all types of flight controllers like Pixhawk APM etc. I a expert in dealing with software like ArduPilot, Motion Planner, PX4 etc and I have 7 years of Industrial experience in dealing with Robotics(Mobile robots, Manipulators), Power Electronics, Electrical Engineering, Electronics components and all type of microcontrollers C/C++, Python programming like Arduino PIC STM 32 Esp32 ESP8266 Raspberry PI
Since I am new at free Freelancer.com I will give you cheapest price for service because I am building my profile. Kindly contact me and we will discus the detail of task. Budget and time will be decided in chat.
Regards
M Ali Abid