Embedded Systems Engineer for Firmware Review

Luminary Jewels — PCB & Schematic Review Upwork Job Posting PCB & Schematic Review — $150 Fixed Rate I'm looking for an experienced embedded systems engineer or PCB designer to review the schematic and PCB layout for a small wearable product I've designed in KiCad. This is a real commercial product heading toward manufacturing at JLCPCB. What the Device Does A smart reminder bracelet that glows (WS2812B LED) and vibrates (coin motor) at scheduled times throughout the day. Screen-free, jewelry-style wearable. Core Requirements the Design Must Support • RP2040 microcontroller • WS2812B NeoPixel LED (center, front-facing) • Coin vibration motor • PCF8563T RTC (real-time clock for scheduled reminders) • W25Q16 SPI Flash (for storing reminder schedules) • USB-C connector (charging + firmware programming via Web Serial API) • LiPo battery charging (MCP73831 or similar) • 3.3V regulation • Capacitive touch input (single pad, GPIO-based) • NO Bluetooth required Board Specs • 36×23mm oval, two-layer PCB • Designed in KiCad • Intended for JLCPCB SMT assembly What I Need From You 1. Schematic review — verify all connections are correct, no missing pull-up/pull-down resistors, decoupling caps properly placed, power sequencing is sound 2. PCB layout review — check trace routing, via placement, ground pour integrity, crystal placement and keepout zones, USB differential pair, component clearances 3. BOM review — confirm all components are correct values and JLCPCB-sourceable 4. Flag any issues that would prevent the board from functioning or passing basic manufacturing DRC at JLCPCB 5. Short written summary of findings with priority levels (critical / important / minor) What I'll Provide • KiCad schematic file (.kicad_sch) • KiCad PCB file (.kicad_pcb) • Gerber files • BOM (CSV) • CPL placement file