STM32 Firmware Development

Looking for experienced STM32 firmware developer. The goal is to write a firmware for our printer prototype. It is quite simple and involves receiving data on UART and driving multiple GPIO signals (data, clock, step motor) at a fixed frequency (will start slow but will try to push it to 16MHz) following a simple algorithm that we will provide. The work must be done on NUCLEO-F401RE and you must own this Nucleo board to apply. The first step is to write the basic firmware but there will be a lot more work as we start testing the PCB and eventually move to the full product. We need someone who is available right away and can start the job and can dedicate at least a few hours every day. We will monitor the progress daily so don't bother applying if you cannot start right away. Please briefly detail your experience with STM32. Start your proposal with "STM32 PRINTER" to confirm you have read this description to the end.