Hi,
I have experience for 15+ years in electronics/embedded development.
I have several years of advanced AVR/arduino development, including library development from scratch. Practically all Arduino AVR boards used, like: 2009, 2010, UNO, MEGA, NANO, MICRO, MINI, etc. Several shields used like Ethernet (W5100, ENC28J60, etc.) with various IP protocols implementation, various graphical TFTs with and without touchscreen and various BUS types (parallel, SPI, I2C, etc.), all kinds of sensors and buses, serial and parallel memories, etc.
I also have experience in homemade CNCs and 3D printers, with axis movement generated by stepper motors. I have used several types of drivers, like "pololu a4988" controllers or simple h-bridges (L298/L293-alike) with the 4 coil outputs directly controlled by arduino output pins (with help from stable and reliable libraries).
I have never used bitvoicer, but I am familiar with it and will have no problem in implementing your project.
If you are interested in my bid, please let me know some more details about your project and I'll be able to answer you back telling if I'm up to the task or not. Feel free to contact me.
Regards,
Carlos.