software for uC, UART and SPI

I am in need of a software developer who can create a software for a specific microcontroller, ARM. The purpose of the software is to handle data transmission. The project requires the use of a custom communication protocol for UART and SPI.

Ideal skills and experience for the job:
- Proficiency in programming for ARM microcontrollers
- Experience in developing software for data transmission
- Familiarity with custom communication protocols for UART and SPI