Bluetooth Test Engineer Jobs in Minnesota (NOW HIRING)

Cerillo is a Charlottesville, VA-based HAMILTON Company subsidiary focused on advancing human, environmental, and ecological health through its suite of innovative laboratory instrumentation. Through its Rayo platform of compact, precision microplate readers and the Canopy real-time monitoring system, Cerillo equips academic, government, and biotech/pharma researchers with affordable, accessible tools that ensure consistency and reproducibility.

The Electrical Engineer is a core member of the Engineering team responsible for designing, developing, and testing the electronic systems and PCB hardware that power Cerillo's compact microplate readers. The Electrical Engineer works at the intersection of optics, embedded systems, and precision analog design, collaborating closely with mechanical and optical engineers to deliver innovative, reliable lab instruments for the life sciences market.

The essential functions include, but are not limited to the following:

• Design, develop, and validate analog and digital circuitry for precision absorbance measurement systems, including photodetector amplifiers, LED drive circuits, gas-discharge and arc lamp power supplies, and multi-wavelength optical sensing electronics
• Develop embedded firmware (C/C++) for microcontrollers managing sensor acquisition, data processing, and wireless/USB communication
• Conduct electrical and functional testing, including noise analysis, signal integrity, EMC/EMI evaluation, and regulatory pre-compliance testing
• Collaborate with mechanical and optical engineers to integrate electronics into compact, environmentally robust enclosures suitable for anaerobic chambers, incubators, and field use
• Perform PCB layout, including noise management, impedance control, and thermal management
• Support design for manufacturability (DFM) and design for testability (DFT) activities, working with contract manufacturers and suppliers
• Troubleshoot and debug hardware issues at the board and system level throughout development and production
• Maintain detailed design documentation including schematics, BOMs, design history files, and test protocols
• Assist in the selection and qualification of electrical components and subassemblies
• Support regulatory submissions (FCC, CE, UL) as needed
• Contribute to product roadmap planning and provide engineering input on new product concepts
• Perform ad-hoc engineering tasks as directed by the Chief Executive Officer and/or Engineering leadership

• Proficiency in PCB design tools (Altium Designer, KiCad, or equivalent) and EDA simulation tools (LTSpice or equivalent)
• Experience with analog circuit design: transimpedance amplifiers, low-noise signal conditioning, ADC interfaces, and power management
• Experience with embedded microcontroller platforms (AVR, STM32, ARM Cortex, or similar) and firmware development in C/C++
• Familiarity with optical sensing systems, photodiodes, and LED drive circuits is strongly preferred
• Knowledge of internal and external digital communication protocols: I2C, SPI, UART, USB, ZigBee, Bluetooth/BLE
• Experience with test equipment: oscilloscopes, logic analyzers, and precision multimeters
• Familiarity with regulatory standards (FCC Part 15, CE marking, IEC 61010) preferred
• Strong problem-solving skills and attention to detail
• Excellent written and verbal communication skills
• Ability to work independently and collaboratively in a fast-paced startup environment

• Bachelor's degree in Electrical Engineering or related field required; Master's degree preferred
• 3+ years of experience in hardware/electronics design, preferably in medical devices, scientific instrumentation, or biotech

The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this position. Reasonable accommodations may be made to enable individuals with disabilities to perform the functions.

While performing the duties of this position, the employee is regularly required to talk or hear. The employee frequently is required to use hands or fingers, and handle or feel objects, tools, or controls. The employee is occasionally required to stand; walk; sit; reach with hands and arms; and stoop, kneel, or crouch. The employee must occasionally lift and/or move up to 25 pounds. Specific vision abilities required by this position include close vision, distance vision, peripheral

EEO - It is the policy of this organization to provide equal employment opportunities to all qualified applicants without regard to race, creed, color, national origin, sex, age 40 and over, disability, marital status, sexual orientation, gender identity, genetic information, citizenship status, religious preference, or veteran status in all phases of the employment process and in compliance with applicable federal, state, and local laws and regulations.