Compact 32-Pin IO Board Design

I am finalising the architecture for a 32-pin I/O board that must squeeze into a very tight 57.20 × 46.10 mm envelope while cleanly switching 12 V lines. The board will sit behind an external controller,... (Budget: ₹1500 - ₹12500 INR, Jobs: 3D CAD, Circuit Design, Electrical Engineering, Electronics, Embedded Systems, Industrial Design, PCB Layout, Simulation)