Firmware Engineer- Embedded Systems – STM32

4–6 Month REMOTE Contract:

Electrical & Firmware Engineer — Weather Station Redesign Project

We are seeking an experienced Electrical & Firmware Engineer to support the redesign of a modular weather station system. This contract position involves consolidating three legacy weather station products into a unified hardware and firmware platform, featuring ultrasonic measurement and advanced environmental sensors. You will handle both PCB design and low-level firmware development, seeing the electronics through design, prototyping, and iterative test cycles—all in close collaboration with our internal engineering team.

Project Duration: 4–6 months, with potential for extension or future opportunities

Location: Remote (occasional travel to Grants Pass, Oregon may be required for testing and project handoff)

Start Date: ASAP

	
• Design and layout PCBs using Altium Designer (license and shared vault provided)
  
  	

• Develop electronics using STM32 ARM Cortex processors, from schematic to board bring-up
  
  	

• Select and integrate humidity/temperature (RH/T) sensors, barometric pressure sensors, and ultrasonic transducers
  
  	

• Implement and test connectivity using RS-232, RS-485, SDI-12, and USB interfaces
  
  	

• Develop embedded firmware in C using STM32Cube/HAL for hardware abstraction
  
  	

• Implement and maintain communication protocols and sensor control—including ultrasonic measurement routines
  
  	

• Develop serial communications and manage peripheral interfaces via UART, SPI, I2C, analog signals, and A/D and D/A conversion
  
  	

• Apply basic digital signal processing (DSP) and PID control as needed for sensor data handling
  
  	

• Reference and optimize existing sensor firmware code for system integration and performance
  
  	

• Lead iterative prototype and system testing, particularly during wind tunnel qualification
  
  	

• Document design, code, and test procedures; participate in knowledge transfer with the internal team
  
  	

• Collaborate closely with the customer’s hardware and firmware teams to ensure project success
  
  

	
• Hands-on experience with Altium Designer for PCB development
  
  	

• Proven ability to design with STM32 ARM Cortex processors (both hardware and firmware aspects)
  
  	

• Strong embedded C programming skills and expertise with STM32Cube/HAL
  
  	

• Solid knowledge of serial communications (RS-232, RS-485, SDI-12, USB) and sensor integration
  
  	

• Familiarity with ultrasonic transducer selection and environmental sensor interfacing
  
  	

• Experience with A/D, D/A, DSP, and PID control in embedded systems
  
  	

• Capable of working independently and collaboratively across disciplines
  
  	

• Willingness and ability to travel periodically to Grants Pass, Oregon for critical test and integration phases (if required)
  
  	

• Local candidates preferred, but remote candidates considered
  
  

If you’re ready to tackle an end-to-end electronic systems challenge and help deliver the next generation of modular weather station technology, please send your resume and a brief summary of related project experience.

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