Battery & Electronics Engineer

We are Senbiosys, also known as Velia after our first product, the Velia smart ring. A fast-growing Neuchâtel-based technology and product company dedicated to creating innovative solutions that empower people to live healthier and more connected lives. Our vision is to combine cutting-edge science with thoughtful design, delivering products and experiences that enhance well-being and longevity. We value curiosity, excellence and teamwork, and we are building a culture that thrives on innovation and trust.

Personal health and wellness tracking is a dynamic and growing market. People want to understand their bodies better, using insights from signals such as heart rate and blood oxygen to build healthier habits and stay motivated. The challenge is to integrate sensors that measure these signals more accurately, without placing an excessive burden on the battery.

That challenge is at the heart of what we do. We have developed a new, patented generation of photoplethysmography (PPG) sensors that use CMOS image sensor technology to build monolithic PPG sensors. They capture a high-quality signal with far less power, in a fraction of the space of conventional approaches. In the Velia ring, our patent pending 360° sensor constellation, with 108 optical paths, tracks signals such as sleep, breathing and heart rhythm, and the app turns them into meaningful guidance instead of constant alerts.

Every microamp matters in a ring. Our sensors make measurement efficient; the next challenge is turning that efficiency into outstanding battery life. That's where you come in.

We are seeking an experienced Battery & Electronics Engineer to join our Electronics Engineering team in Neuchatel. This role will be responsible for defining, developing, validating, and optimising lithium-ion battery systems for consumer electronics and wearable products.

The successful candidate will have a proven track record of taking battery and power electronics from concept through prototype, validation and mass production. They will act as the technical lead for battery-related development activities, working closely with battery suppliers, electronics engineers, firmware engineers, mechanical engineers, and manufacturing partners.

This position is critical to delivering products with industry-leading battery performance, reliability, safety, and lifetime.

• Lead battery technology selection and specification for new consumer electronic and wearable products.
• Define battery performance requirements including capacity, energy density, cycle life, charging performance, operating temperature range, and safety requirements.
• Develop battery qualification plans and acceptance criteria.
• Own battery-related technical decisions throughout the product development lifecycle.

• Design and execute battery characterisation and validation programmes.
• Analyse battery performance under real-world use cases and environmental conditions.
• Drive root cause investigations for battery-related issues during development, manufacturing, and field operation.
• Define and manage reliability, lifetime, and degradation testing.
• Establish battery performance metrics and monitoring strategies.

• Specify and optimise battery management system architectures for lithium-ion powered products.
• Work closely with hardware and firmware teams to implement:
• State of Charge (SOC) estimation
• State of Health (SOH) monitoring
• Charging algorithms
• Protection systems
• Power management strategies
• Optimise charging, discharging, and power consumption behaviour to maximise user experience and battery longevity.
• Support development of battery fuel gauging and calibration methodologies.

• Contribute to system architecture and power subsystem design.
• Define battery-related hardware requirements including:
• Power path management
• Thermal monitoring systems
• Support PCB design reviews and validation activities.
• Collaborate with firmware teams on power optimisation and battery control strategies.
• Act as primary technical interface for battery suppliers and battery-related component vendors.
• Review supplier test data, qualification reports, and manufacturing controls.
• Drive supplier technical reviews and issue resolution.
• Support sourcing activities, supplier audits, and technology evaluations.
• Work with manufacturing partners to ensure consistent battery quality and performance.