Embedded Systems, PCB & Firmware Engineer (RP2350 Automotive Touch Gauge)

Job Description: Embedded Systems, PCB & Firmware Engineer (RP2350 Automotive Touch Gauge) ​Job Title: Embedded Hardware & C++ Firmware Engineer – Turnkey Development for RP2350 Touch Gauge (KiCad / Pico SDK) ​Project Overview: ​We are seeking an experienced embedded systems engineer (or engineering firm) to handle the turnkey hardware, firmware, and mechanical design for a high-performance 1.46" Round Smart E85/Flex Fuel Touch Gauge (480 \times 480 IPS display). ​We provide a complete, vetted Product Requirements Document (PRD) detailing all electrical netlists, sensor telemetry formulas, starter C++ logic, and complete UI/UX visual assets. You will be responsible for bringing this architecture to life by creating the production PCB files, full firmware repository, and 3D enclosure models. ​What We Provide to You on Day 1: ​Detailed Technical PRD & Architecture Document: ​Full netlist for the carrier PCB (power conditioning, optocoupler level-shifting, TVS surge protection, RC noise filtering, and connector pinouts). ​Complete Continental sensor signal decoding math (frequency to ethanol %, duty cycle to fuel temp). ​Starter C++ code structure illustrating Core 0 interrupt processing and Core 1 LVGL UI setup. up. ​UI/UX Design & Asset Package: ​High-resolution visual mockups and layout coordinate specifications. ​Ready-to-use 24-bit transparent PNG graphics (boot_logo.png, bg_track.png, arc_gradient.png, temp_track.png). ​Vector logo files (.AI SVG) and typography (.TTF). F). ​Your Required Deliverables (Scope of Work): ​1. Carrier PCB Design & Manufacturing Package (KiCad or Altium) ​Schematic Capture: Draw the schematic in KiCad/Altium based on our provided netlist and component specs. ​2-Layer PCB Layout: Route a 1.6\text mm FR4 carrier board that plugs directly into the rear of the 1.46" RP2350 display board. ​Rear Connector Integration: Incorporate a male Deutsch DT 3-Pin or 4-Pin Flange PCB Header (DT13/DT15 series). ​Production Files: Deliver Gerber, Drill, Pick-and-Place (CPL), and SMT Bill of Materials (BOM with Mouser/DigiKey part numbers) ready for automated assembly (JLCPCB) ​2. Production C++ Firmware Repository (Pico SDK / LVGL) ​Complete Firmware Codebase: Develop the production-ready C++ firmware repository using the Raspberry Pi Pico SDK and LVGL (v8/v9). ​Display & Touch Drivers: Integrate QSPI drivers for the 1.46" round display (480 \times 480) and I2C capacitive touch drivers (CST816 series). ​Dual-Core Execution: . ​3. 3D Mechanical Enclosure CAD ​Required Qualifications: ​Proposal Submission Requirements: ​Please include the following in your bid: ​Core 0: Hardware timer interrupts/PIO sampling GPIO 20 for flex fuel frequency and pulse width, implementing an 8-sample moving average filter. ​Core 1: LVGL 60 FPS graphics engine, converting provided PNG assets into C-arrays, rendering dynamic arc fills, and managing PWM backlight fade animations. ​Non-Volatile Storage (NVS): Flash memory driver to save unit preferences (°C / °F) when toggled via touch. ​Build System: Deliver a clean CMakeLists.txt build system for simple compilation. ​3D CAD Model: Design a .STEP model for a standard 52mm (2-1/16") outer diameter cylindrical sleeve to house the display stack and carrier board. ​Features: Internal board standoffs, rear Deutsch DT flange mount, and downward-facing thermal ventilation slots. ​Material Spec: Optimized for high-temperature 3D printing (PETG, ABS, ASA) or CNC aluminum. ​Demonstrated experience in automotive electronics, PCB design (KiCad/Altium), and power/transient protection. ​Advanced C++ skills with the Raspberry Pi Pico SDK (RP2040/RP2350 dual-core architecture). ​Proven experience developing embedded GUIs using LVGL, including custom drivers and image array conversions. ​Proficiency in 3D mechanical CAD modeling (.STEP files). ​Examples of previous microcontroller PCB designs and embedded GUI/LVGL projects.