PCB Design Engineer (KiCAD)

Freelance PCB Designer (KiCAD) Looking for a PCB designer to modify an existing open-source ADS1299-based biosignal acquisition board. The schematic is mostly complete. The work primarily involves PCB layout, component placement, routing, design review, and preparing the board for manufacturing. Requirements - Experience with KiCAD - Experience designing 4-layer PCBs - Familiarity with ESP32-based designs - Understanding of mixed-signal layouts (analog + digital) Preferred - Experience with EEG, EMG, ECG, or other biosignal hardware - Experience with low-noise ADC layouts Deliverables - Updated KiCAD project - PCB layout - Gerber files - Manufacturing-ready design - DRC-clean final board This is a modification of an existing open-source design, not a board designed from scratch.