Scientist - Development of Ion-Selective Electrode

We are developing Wear & Forget® wearables for continuous hormone monitoring, combining on-demand sweat extraction with aptamer-based biosensing. Based at the Lausanne Biopôle, we are a small, multidisciplinary team of scientists and engineers driven by a shared mission: bringing real-time, non-invasive biomarker monitoring to reproductive and maternal health. We thrive in a fast-paced, collaborative environment where scientific rigor, rapid iteration, and real-world impact are at the core of everything we do.

We’re looking for a scientist with hands-on experience developing ion-selective and potentiometric sensors to lead the development of a sweat chloride sensor for our wearable platform.

You’ll take an existing sensor concept through optimization, validation, and integration, with a focus on reliable performance in real sweat: selectivity, stability, drift, reproducibility, calibration, and sensor lifetime.

General electrochemistry experience without prior ion-selective/potentiometric sensor development is not sufficient for this role..

• Design and manufacture the sensor-rich PCB + corresponding mechanical platform
• Develop and optimize chloride-selective and reference electrodes for sweat
• Optimize membrane composition, electrode interfaces, and sensor conditioning
• Characterize selectivity, sensitivity, drift, stability, reproducibility, and lifetime
• Validate sensors in artificial and human sweat and investigate matrix effects
• Establish robust fabrication, calibration, and testing protocols
• Integrate the sensor with microfluidics, electronics, and the Mole Sense wearable platform
• Troubleshoot failure modes and drive the sensor toward a reproducible, manufacturable design
• Document development and contribute to IP and product development

• You have direct, hands-on experience developing ion-selective or potentiometric sensors, ideally for chloride
• You have worked with ion-selective membranes, ionophores, reference electrodes, and electrode fabrication
• You understand practical challenges such as drift, calibration stability, matrix effects, fouling, and reference electrode stability
• You have tested sensors in sweat, biofluids, or other complex matrices
• You have experience taking sensors from laboratory prototypes toward integrated devices
• You have a background in electrochemistry, analytical chemistry, materials science, bioengineering, or a related field
• Experience with wearable sensors, flexible or printed electrodes, or microfluidics is a strong advantage

• Work on cutting-edge femtech hardware from prototype to product
• A collaborative, multidisciplinary, international team
• The opportunity to build next-generation molecular sensing technologies with real clinical impact
• Swiss visa and work permit sponsorship for outstanding international candidates
• A fast-moving, highly collaborative team where decisions happen quickly
• Resources, autonomy and trust to do exceptional work
• Access to EPFL's world-class laboratories and research ecosystem
• Direct collaboration with leading scientists and engineers across biosensing, chemistry and device development
• Clear opportunities to grow into technical leadership as the company scales