Arduino firmware to control basic sensors and leds

I need someone to write the firmware code for a few sensors that will get connector to my Arduino Nano. It's quite simple but I need it to be wrapped into a stand-alone class for each sensor (I will provide the details). Only non-blocking programming allowed as there can be many sensors being run in parallel. In short, I need the driver library files for each sensor but in a specified class structure/format. If that sound familiar, then please apply and mention any relevant experience you have. This should be a quick job for someone experience with Arduino and it should lead to more work with us. Thank You !