Battery & Electronics Engineer

Velia; Neuenburg; On-site; CHF 120,000 - 170,000; Full time

Job summary

Senbiosys (Velia) in Neuchâtel is seeking an experienced Battery & Electronics Engineer to define, develop, validate, and optimise lithium-ion battery systems for consumer electronics and wearables. You will lead battery-related decisions, work with suppliers, and partner with hardware and firmware teams to maximize battery life and safety.

The role includes ownership of battery architecture, validation programs, and integration with power management, with a focus on mass production readiness

Qualifications

• Bachelor’s or Master’s degree in Electronic Engineering, Electrical Engineering, Physics, Materials Science, or a related discipline.
• 5+ years of experience developing lithium-ion battery powered consumer electronics products.
• Experience delivering products from concept through mass production.
• Experience specifying and qualifying rechargeable lithium-ion batteries for consumer electronics, wearables, or portable devices.
• Strong understanding of battery degradation mechanisms, cycle life, and reliability engineering.
• Experience working directly with battery manufacturers and suppliers.
• Hands-on experience with battery characterisation, test methods, and data analysis.
• Experience defining battery qualification and validation plans.
• Strong understanding of power electronics and embedded hardware design.

Responsibilities

• Own battery technology selection and specification for new consumer electronics and wearables.
• Define battery performance requirements including capacity, energy density, cycle life, charging performance, operating temperature, and safety.
• 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.
• Collaborate with hardware and firmware teams on SOC/SOH, charging algorithms, protection, and power management.
• Support development of fuel gauging and calibration methodologies.
• Support PCB design reviews and validation activities.
• Act as primary interface for battery suppliers and related components.
• Review supplier test data and manufacturing controls.
• Drive supplier technical reviews and issue resolution.
• Support sourcing activities, supplier audits, and technology evaluations.
• Work with manufacturing partners to ensure battery quality and performance.
• Support EVT, DVT, PVT, and mass production phases.
• Develop manufacturing test and screening requirements for battery systems.
• Review production data and drive improvements.
• Support regulatory compliance and certification activities for battery safety.

Skills

Lithium-ion battery technology

Battery qualification and reliability

Battery Management Systems

Failure analysis

Cross-functional collaboration

Education

Bachelor’s or Master’s degree in Electronic Engineering or related field

Tools

Fuel gauge ICs

Battery management ICs

Job description

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.

About the Role

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.

Key Responsibilities

Battery System Ownership

• 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.

Battery Validation & Reliability

• 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.

Battery Management System (BMS) Development

• 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.

Electronics Development Support

• 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.

Product Development & Manufacturing

• Support products through EVT, DVT, PVT, and mass production phases.
• Develop manufacturing test and screening requirements for battery systems.
• Review production data and drive continuous improvements.
• Support regulatory compliance and certification activities related to battery safety and transportation.

Required Experience

• Bachelor’s or Master’s degree in Electronic Engineering, Electrical Engineering, Physics, Materials Science, or a related discipline.
• 5+ years of experience developing lithium-ion battery powered consumer electronics products.
• Demonstrated experience delivering products from concept through mass production.
• Experience specifying and qualifying rechargeable lithium-ion batteries for consumer electronics, wearables, or portable devices.
• Strong understanding of battery degradation mechanisms, cycle life, and reliability engineering.
• Experience working directly with battery manufacturers and suppliers.
• Hands-on experience with battery characterisation, test methods, and data analysis.
• Experience defining battery qualification and validation plans.
• Strong understanding of power electronics and embedded hardware design.

Preferred Experience

• Experience developing wearable devices, smart rings, smart watches, fitness trackers, or other highly space-constrained battery powered consumer or medical electronic products.
• Experience with fuel gauge ICs and battery management ICs.
• Understanding of lithium-ion cell chemistry selection and trade-offs.
• Experience with thermal modelling and battery thermal management.
• Familiarity with battery safety standards and regulatory requirements.
• Experience analysing battery field-return and reliability data.

Key Skills

• Lithium-ion battery technology
• Battery qualification and reliability testing
• Battery Management Systems (BMS)
• Failure analysis and root cause investigation
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• Supplier technical management
• Cross-functional collaboration

Success Measures

• Achievement of product battery life and runtime targets.
• Delivery of battery systems meeting reliability and safety requirements.
• Successful qualification and launch of battery-powered products.
• Reduction of battery-related field failures and warranty returns.
• Continuous improvement of battery lifetime, charging performance, and user experience.
• Strong supplier performance and technical partnerships.

What you can expect

• A flexible and dynamic working environment within a motivated startup team cumulating a vertical stack of technology from sensor chip to wearable health monitoring devices and associated algorithms and applications
• Daily challenges as a member of a very motivated, multicultural team.