Arduino-compatible Isolated Encoder Signal Splitter Hardware Design

I require an intricate hardware developer with technical mastery to custom design an isolated encoder signal splitter board that's compatible with Arduino micro-controller, specifically ATmega2560. Key Features: 1. Voltage Isolation: The board must feature voltage isolation to ensure safe transmissions. 2. Compatibility: It must be fully interoperable with Arduino libraries which serves as a platform for expansion and experimentation. 3. Signal Amplification: the board should not draw more current than pull-up resistors for incremental encoders connection. If required, a signal amplification needs to be implemented. Standard signal voltage is 5V DC. Main Purpose: 1. Noise Reduction: It should provide clear communication by suppressing ambient noise in the signal. There is a 23V AC 16KHz ground noise against a vehicle chassis where the board is intended to be used. So, ground needs to be isolated. 2. Signal Distribution: The designed board will serve as a hub for signal distribution in my project. The original signal shall be provided as an output of the board with the original ground while the splitted signal shall be used for internal processing on the micro-controller with isolated signals and ground. Two AB incremental encoders shall be connected to the board. Power Requirement: The board should operate effectively on a 5V DC power supply via USB. Functionality: It is like a signal sniffer. 1. Input and output are the same signals: two single-ended AB encoders, i.e. 4 lines of 5V DC and a common ground 2. Isolate the inputs and ground and connect them to the Arduino-compatible microcontroller like ATmega2560. Use interrupt pins to connect. 3. The power and communication should be provided via USB. 4. Use micro-controllers with built-in boot-loader or otherwise take care of the boot-loader flashing to be compatible with Arduino framework. Preferred PCBA design software: Autodesk EAGLE or Fusion 360 Potential freelancers must possess proficient hardware development experience, Arduino platform familiarity, and a strong understanding of signal transmission systems for an effective design realization. Experience with ATmega2560 microcontroller will be an added advantage.