Automation Expert: Schematic Design, PID Control & Python UI for Reflow Oven

We are seeking an experienced automation, electrical, and embedded systems engineer to design the schematic and develop the firmware for PCB reflow oven The system must precisely follow standard lead-free solder reflow profiles (preheat, soak, reflow, and cooling) Key Responsibilities & Requirements: Electrical Schematic Design: Create a safe, reliable wiring schematic detailing the connections, thermal sensor amplifiers PID Thermal Control: Implement and tune a Python-based PID loop algorithm to eliminate thermal overshoot and handle heating lag via SSR control.Touchscreen UI (Python): Build a clean, responsive graphical user interface using a framework. Hardware & Input Redundancy:The interface must be optimized touchscreen, but allow a standard USB mouse to take over seamlessly if the touchscreen fails.Integrate physical hardware buttons for critical operations (e.g., Start, Stop, Emergency Pause) handled via GPIO.Profile Management Database: Program the system to save, edit, and load multiple distinct solder profiles (using JSON or SQLite) optimized for different PCB thicknesses and components. Required Skills:Proven expertise in electrical schematic design (KiCad, Altium, or EasyEDA) with a strong understanding of mains AC safety and hardware isolation.Expert proficiency in Python development (specifically UI frameworks like PyQt/PySide and GPIO interfacing).Deep understanding of PID loop tuning and industrial thermal dynamics.Prior experience with reflow ovens or profile-based industrial heating is highly preferred. Deliverables:Complete electrical schematic diagrams (PDF and native CAD files).Fully functional PID control algorithm and responsive Python UI code.Local profile storage system with pre-configured standard reflow profiles.Clear documentation detailing the tuned parameters and wiring guides.