Fully aligned with the global challenges of the energy transition, Sweetch Energy is working toward a carbon-neutral world by developing a large-scale electricity generation technology that harnesses osmotic energy, naturally produced when freshwater meets seawater.
Our INOD® technology will enable us to generate clean electricity competitively from a massively available yet untapped energy source: osmotic energy.
We collaborate closely with major industrial partners such as the Compagnie Nationale du Rhône (CNR) and EDF Hydro to deploy these solutions at scale. The first pilot osmotic power plant, located at the mouth of the Rhône River, aims to demonstrate the potential of this technology under real-world conditions.
Driven by a commitment to push the boundaries of renewable energy, our team combines scientific expertise with industrial vision.
Your mission is to design the architecture of the cell (mini-stack) and define the electrodes (materials, interfaces, geometry) in order to achieve performance (power, efficiency, ΔP), reliability, and cost targets. You specify and validate the functional and geometrical definition; the creation and management of 3D models are under the responsibility of the Module Integration Lead and the Product Development Lead, with whom you will work in close collaboration.
Cell / mini-stack architecture: define the structure (flow fields, plates, gaskets, compression interfaces) and the trade-offs between hydraulics / electrochemistry / pressure drop; freeze the product definition at the appropriate maturity level.
Electrodes & interfaces: specify substrates, active layers, and surface treatments; optimize porosity, conductivity, specific surface area, contact resistance, and chemical stability.
Microfluidics & distribution (co-engineering with the Filtration & Micro-Hydraulics System Engineer): design channel/collector networks for flow and current density homogeneity; the Senior Cell Designer defines the flow fields, interfaces, and performance criteria; the F&MH System Engineer formalizes hydraulic requirements (pressure drop, allowable gradients, connections, fouling limitations) and validates module-level integration.
Materials & compatibility: select metals/polymers/composites; define coatings, anti-corrosion measures, and material pairings compatible with membranes and fluids.
Assembly & sealing (co-engineering with the Module Integration Lead and the Filtration & Micro-Hydraulics System Engineer): define, with the aforementioned leads, the assembly strategy (bonding/welding/compression) and gasket plan; clearly allocate responsibilities (Senior Cell Designer: cell architecture, interfaces, and gasket plan; Module Integration Lead: module/skid interfaces, tooling, DfA/DfM; F&MH System Engineer: hydraulic requirements, pressure drop, connections); co-validate mechanical integrity/sealing and set acceptance criteria and control plans.
Specifications & deliverables: produce functional requirements, critical tolerances, and 2D schematics; review/annotate/validate 3D models issued by the Module Integration Lead / Product Development Lead; maintain bills of materials and calculation notes.
Design validation testing: define, with the Validation team, cell/electrode test protocols; analyze results and drive design iterations.
Industrialization: work with the Process Team (stacking, bonding/welding, in-line controls) and Material Development (membrane/electrode interface) to translate design into robust processes (DfM/DfA).
Cost & durability: propose cost-down options (materials, processes, standardization) and reliability levers (robust design, accelerated aging).
Configuration management: manage design changes (ECR/ECO) and ensure consistency between calculations, tests, and product definition.
Mechanical / Materials / Electrochemistry Engineer (Arts et Métiers, Mines Paris, CentraleSupélec, INSA, ENSAM, Grenoble INP, Polytech, or equivalent).
7 to 12 years of experience in the design of cells/mini-stacks or fluidic/electrochemical devices (fuel cell, battery, electrolyzer, heat exchangers, fluid-based medical devices).
Proven expertise in microfluidics, electrochemical interfaces, and the assembly of soft materials, tolerances, and DfM/DfA.
3D CAD: ability to read, annotate, and validate 3D models and drawings; ownership of 3D modeling (creation/management) lies with the Module Integration Lead and the Product Development Lead.
Simulation: ability to define load cases and criteria and to review FEM/CFD analyses carried out by experts; hands-on practice is a plus.
Co-engineering: demonstrated ability to work with the Module Integration Lead and the Filtration & Micro-Hydraulics System Engineer (multi-constraint trade-offs: electrochemistry / microfluidics / assembly / DfA-DfM), to prioritize design compromises, and to secure alignment of deliverables (requirements, models, tests).
Data analysis & iteration: comfortable with analyzing test data and conducting rapid design→test→design loops; experience working in a matrix organization (Product / Materials / Process / Validation).
Fluent in technical English; strong documentation discipline, sense of priorities, and team spirit.