Battery & Electronics Engineer in Neuenburg am Rhein

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 RoleWe 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 ResponsibilitiesBattery System OwnershipLead 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 & ReliabilityDesign 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) DevelopmentSpecify and optimise battery management system architectures for lithium-ion powered products.Work closely with hardware and firmware teams to implement:State of Charge (SOC) estimationState of Health (SOH) monitoringCharging algorithmsProtection systemsPower management strategiesOptimise charging, discharging, and power consumption behaviour to maximise user experience and battery longevity.Support development of battery fuel gauging and calibration methodologies.Electronics Development SupportContribute to system architecture and power subsystem design.Define battery-related hardware requirements including:Power path managementThermal monitoring systemsSupport 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 & ManufacturingSupport 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 ExperienceBachelor’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 ExperienceExperience 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 SkillsLithium-ion battery technologyBattery qualification and reliability testingBattery Management Systems (BMS)Failure analysis and root cause investigation