4S 16.8 V BMS Design

I need a compact Battery-Management System for a 4-cell Li-ion pack that reaches 16.8 V at full charge. The board must integrate every key safeguard: over-charge, over-discharge, short-circuit, thermal cut-off and reliable cell-to-cell balancing... (Budget: ₹1500 - ₹12500 INR, Jobs: Circuit Design, Electrical Engineering, Electronics, Embedded Systems, Firmware Development, PCB Layout)