Audio Recording+Playback Circuit Design

We are looking for an electronics circuit designer with expertise in audio recording and playback to design a circuit for a small device with the following specifications:

Device Requirements:
Recording and Playback Functions:
The device should record audio when a button is pressed.
The playback should be triggered by an interrupt (via I2C).
Audio Quality:
The audio resolution should be at least 16-bit for high-quality recording and playback.
Audio Alerts:
The device should emit audio alerts in the following scenarios:
When recording starts.
When recording ends.
When the battery is low.
Power Efficiency:
The microcontroller must support sleep mode to save power.
The device should operate on 3 AAA batteries, using low-cost and power-efficient components.
Trigger by Event:
The device should remain in sleep mode until activated by an I2C interrupt.
Hardware Testing:
The designer must be able to personally test the circuit and hardware and perform experiments to ensure proper functionality.
Additional Information:
Board dimensions: Predefined dimensions will be provided upon request.
Component list: A preliminary list of possible components is available and can be shared with the designer.