Senior Electrical Engineer - Pleasanton, CA

Calyxo, Inc. is a medical device company headquartered in Pleasanton, California, USA. The company was founded in 2016 to address the profound need for improved kidney stone treatment. Kidney stone disease is a common, painful condition that consumes vast amounts of healthcare resources each year. Our team is led by executives and investors with a proven track record of commercializing paradigm-shifting devices to meet unmet needs within urology.

Are you ready to change the future of kidney stone treatment? We are seeking high achievers who want to be part of a dynamic team working in a fun, diverse atmosphere.

Summary:

Calyxo is seeking a highly skilled and innovative electrical engineer to help develop electronic subsystems in kidney stone treatment. This role focuses on the design of PCBAs, cable harnesses, and prototype embedded software for integration of sensing, controls, and communication subsystems into safe and reliable products. This is a hands-on technical leadership role for an engineer who enjoys developing both hardware and embedded software, working across electromechanical, controls systems, and software boundaries to deliver clinically robust performance.

This role requires ensuring that all engineering efforts comply with industry standards and regulatory requirements, while aligning with strategic business objectives.

In This Role, You Will:

• Develop electronic subsystems for a range of sensing, controls and communications applications in medical devices (disposable and capital)
• Translate system-level requirements into schematics, PCBAs, cable assemblies, and interface definitions.
• Define electrical architectures including power distribution, sensing, actuation, safety interlocks, and diagnostics.
• Design low-noise analog, mixed-signal, high-speed and power electronics PCBAs for sensors, actuators, control and communication electronics.
• Specify and design custom cable harnesses (signal, power, shielding, grounding) suitable for medical environments.
• Ensure EMI/EMC robustness and compliance with applicable medical standards (e.g., IEC 60601-1-2).
• Select sensor, actuator, power electronics, and protection components for controls systems with attention to accuracy, drift, long term reliability, environmental exposure (heat, fluids, cleaning agents), component lifecycle, and applicable derating/tolerancing
• Prototype and debug embedded control algorithms for real-time closed-loop control systems (PID, feed forward, fault detection, control limits)
• Collaborate with firmware/software teams to define hardware/firmware interfaces and control strategies
• Support bring-up, tuning, and characterization using lab instrumentation and test fixtures.
• Support electrical and system-level verification and validation testing, including IEC 60601-1 and 60601-1-2 compliance testing
• Contribute to risk analyses (FMEA) with focus on safety-critical failures.
• Support troubleshooting during integration, verification testing, and clinical simulation
• Provide technical oversight to contract design houses and manufacturing partners, including review of schematics, layouts, design changes, test plans, and documentation, ensuring adherence to design intent, quality expectations, and regulatory requirements
• Interact with suppliers and internal operations representatives to perform design transfer, root cause investigation, component lifecycle management, and continuous improvement.
• Partner closely with clinical development engineering, product management, quality, regulatory and other cross-functional teams to bring designs to the market.
• Mentor junior and non-specialist engineering talent, promoting a collaborative and high-performance work environment.

Who You Will Report To:

• Director, Vision and Sensor Systems

Requirements:

Education & Experience

• Bachelor's degree in Electrical Engineering. Master's preferred.
• 8+ years of experience in electronic subsystem design in a regulated product environment; working knowledge of IEC 60601-1, IEC 60601-1-2, and ISO 14971 concepts strongly preferred.
• Analog and mixed-signal circuit design (sensor front-ends, signal conditioning).
• Power electronics and power management (DC-DC, linear regulation, protection).
• PCBA design using modern EDA tools (schematic capture, layout review). Altium experience preferred.
• Design of electrical interfaces for closed-loop control system components (sensors, pumps, valves, heaters). Exposure to manufacturing, DFM/DFT, and field failure analysis of these interfaces strongly preferred.
• Hands-on prototyping, debugging, and lab test methodologies.
• Understanding of EMI/EMC, grounding, and cabling best practices.
• Experience in embedded systems design and hardware/firmware co-
• Proficiency in embedded software development (C/C++) and scripting for hardware automation and data analysis (Python).
  
  Experience with STM
  32 applications preferred.
• Prior experience implementing closed-loop control concepts (PID tuning, stability, disturbance rejection), with exposure to sensor calibration, drift…