Low-Power BLE Motion Sensor Design

Here is the professional project description in English, ready to be posted on platforms like Upwork, Fiverr, or Freelancer.com. Project Title: Hardware Design (Schematic & PCB Layout) for Ultra-Low Power BLE Motion Sensor (nRF52810) Project Description: I am looking for an experienced electronics design engineer with a background in Nordic Semiconductor SoCs to develop a compact, high-efficiency PCB for a motion-tracking sensor node. Hardware Requirements: MCU: Nordic nRF52810 (BLE 5.0 SoC). Sensor: STMicroelectronics LIS2DW12 (3-axis accelerometer, ultra-low power). Memory: Winbond W25Q512 (512Mb SPI Flash) to store 15 days of data at 6Hz. Power Source: CR2032 Coin Cell Battery (Design must be optimized for low peak current/high internal resistance). Antenna: Integrated PCB Trace Antenna or Ceramic Chip Antenna (with impedance matching network). Required Deliverables: Full Schematic: (PDF and source files). PCB Layout: 2-layer design, compact form factor (approx. 25x25mm to 30x30mm). Fabrication Files: (Gerber RS-274X, Excellon Drill) ready for PCBWay/JLCPCB. Assembly Files: Pick & Place / Centroid file for automated SMT assembly. BOM (Bill of Materials): Updated Excel file with exact Manufacturer Part Numbers (MPN). Design Constraints: Surface Finish: Optimized for ENIG finish to ensure battery contact reliability. Power Consumption: Deep sleep current target < 5µA. Efficient power rail decoupling is a must. DFM (Design for Manufacturing): The board must be easy to mass-produce (1,000+ units). Include Test Points for SWD programming and functional testing. Candidate Profile: Strong experience in RF layout (Bluetooth) and battery-optimized IoT devices. Please provide examples of previous work involving Nordic nRF52 series and SPI Flash integration.