Battery Engineer

About the job

We are seeking an experienced Battery Engineer with a strong passion for energy storage, system‑level electrochemistry, and the real‑world impact of their work. In this role, you will focus on developing testing protocols for our next‑generation redox flow batteries. You will work closely with the engineering team responsible for designing the cells and system, translating electrochemical test results into robust KPI data sheet and actionable performance metrics. This role is ideal for someone with a strong foundation in fundamental electrochemistry and hands‑on experience in testing energy storage systems—from a single cell, to stacks/packs, and up to a full system level validation.

About Us

Unbound Potential (UP) is a Swiss startup founded in 2023 by a group of passionate engineers, chemists, and economists from ETH Zürich. We envision a resilient, electrified society, independent not only from fossil fuels but also from critical mined materials such as lithium and vanadium. Our disruptive solution is a membrane‑less redox flow battery powered exclusively by organic chemistry, suitable for both energy‑intensive industries and utilities seeking affordable and sustainable storage options.

What you will do

• Develop and conduct internal electrochemical testing protocols for the fundamental characterization of electrolytes (including pre‑ and post‑mortem analysis), electrodes or BPPs (including corrosion tests).
• Develop and execute testing protocols for single cells and stacks, including studies on the influence of flow rate, current density, SOC, and capacity utilization.
• Develop and perform system‑level testing protocols, including evaluation of round‑trip efficiency (RTE).
• Design and conduct long‑term stability and accelerated aging tests, including the use of a climatic chamber.
• Optimize operational conditions of membrane‑less redox flow batteries to minimize self‑discharge, and maximize coulombic efficiency (CE) and voltage efficiency (VE).
• Validate and execute testing protocols for SOC and SOH monitoring at the system level (including usage of OCV cells and other electrochemical techniques).

What you will bring

• Experience in energy storage system testing (RFB, Li‑ion, FC).
• Degree (MSc or PhD) in Chemical Engineering, Material Science, Physics, or a related field with a strong foundation in electrochemistry.
• Hands‑on experience with potentiostat and data analysis using Python.
• Solution‑oriented mindset with out‑of‑the‑box thinking.
• Experience with good laboratory practices, physico‑chemical characterization of electrolytes, and setting up flow‑based test set‑ups.