High-End Custom MP3 Player Design

Freelancer Job Post: Hardware Engineer for Custom High-Fidelity MP3 Player (DAP)
Project Overview:
I am seeking a highly skilled hardware and PCB designer to develop a compact, premium digital audio player (DAP) inspired by the classic iPod form factor but modernized with high-end specifications. This device is intended for manufacturing and must balance a sleek aesthetic with a powerful internal feature set.

Key Technical Specifications:
Display: High-resolution E-Ink/E-Reader style screen. Requirement: Must support a high refresh rate capable of smooth video playback without ghosting.

Connectivity: * Dual-Mode Bluetooth: For audio output and high-speed data transfer (dedicated mobile app integration for wireless song downloads).

Dual 3.5mm Aux Jacks: For shared listening or multi-output routing.

USB-C: Universal port for fast charging and high-speed wired data transfer.

Storage: Integrated Micro SD card slot for expandable library support.

Audio I/O: * Integrated high-sensitivity Microphone for high-quality voice/instrument recording.

Built-in internal Speaker for playback without headphones.

Power: Optimized power management circuit to provide 30+ hours of continuous playback.

Form Factor: Very compact, pocketable design with a focus on premium, durable materials suitable for mass production.

Project Deliverables:
Full PCB schematic and layout (optimizing for RF/Bluetooth and Audio signal integrity).

Bill of Materials (BOM) focused on sourcing manufacturing-grade components.

all other files dedicated to updating the hardware design in the future

Since i also know embeeded designing i would like to inspect the progress.