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. Also developed several projects in tools from Atmel like AVR Studio and Atmel Studio. Practically all Arduino boards used, like: 2009, 2010, UNO, MEGA, NANO, MICRO, MINI and others like DigiSpark (attiny85) and DUE (ARM Cortex-M3).
By your project description, I couldn't understand if you want the firmware developed in assembly or any other language ("I am looking for someone to write the code either assembler for AVR ATtiny85 micro-controller.").
This bid is not for assembly programming. I would propose implementing your requirements in an attiny85 board I have (digispark) with arduino toolchain (with support for digispark) - in the final you will have an *.hex file you load into the attiny85 AVR chip, along with full source code.
Some details may need clarification in your specification, but we can take care of that if I get the project awarded.
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.
Best regards,
Carlos.