Process Engineer

At Ilion Water Technology, a watertech spin-off from the École Normale Supérieure (ENS) in Paris, we are developing an innovative pressure-free reverse osmosis technology, stemming from our nanofluidics research work.

Our technology, currently under development, has already been recognized with several distinctions, notably:

• Winner of the Innovation Award at Pollutec Paris 2024;

• Finalist of the Miriam Balaban competition, organized by the European Desalination Society 2025;

• Currently in the running for the international desalination competition XPRIZE.

We are confident that our approach can simplify the operating conditions of reverse osmosis skids and significantly reduce their cost and environmental impact. Indeed, our pressure-free technology has anti-fouling properties aimed at decreasing energy consumption and the need for chemical products. It also integrates a system for real-time water quality monitoring.

Paris 75005 (On-site) | Start date: ASAP Contract: Full-time – CDI | Experience: 2-5 years

About Ilion

A spin-off from world-class research at ENS Paris, Ilion Water Technologies is developing a groundbreaking water treatment technology combining nanofluidics, electro-driven processes, and advanced membranes.

We are seeking a pivotal Senior Process Engineer to lead our exciting transition from scientific breakthrough to industrial application.

What you will do

You will be at the helm of our process development, turning innovative prototypes into a robust pilot towards a market-ready product. You will also shape the structure and culture of our process engineering team.

• Lead Process Scale-Up: Design, test, and optimize our next-generation electro-driven membrane processes from early pilot to industrial scale.

• Manage early adopter pilot programs and act as the primary technical liaison with our first clients.

• Drive R&D with Data: Design experimental protocols, analyze complex data to generate actionable insights, and guide our R&D strategy.

• Collaborate & Communicate: Work closely with a world-class team and external stakeholders, reporting results with clarity and rigor.

Your adventure

• A Pivotal Role: Join a mission-driven startup at an early stage where your work will have a direct and tangible impact on our success and the environment.

• Cutting-Edge R&D: Work with high-quality lab equipment and proprietary technology at the forefront of water innovation.

• A-Team: Be part of a supportive, agile, and exceptionally talented team of experts dedicated to a common goal.

• Growth & Learning: Unmatched opportunities for professional growth as the company expands.

• Other Benefits: A competitive package designed to help you thrive both professionally and personally.

Send us your CV and Motivation letter at jobs@ilion-watertech.com

We are looking for a visionary engineer with a hands-on, problem-solving mindset.

• Education: Master’s degree (BAC+5) or PhD in Process Engineering, Chemical Engineering, Electrochemistry, or a related field.

• Experience & Skills: Proven experience in process development, optimization, and scale-up, demonstrated through hands-on expertise in at least one of the following areas:

  • Electro-driven purification (e.g., Electrodialysis/ED, Capacitive Deionization/CDI)

  • Pilot-scale testing

  • General Electrochemistry and Membrane Processes

• Professional Attributes: Strong analytical and organizational skills, a true team spirit, high adaptability, and a proactive mindset ready for the challenges of a fast-paced startup environment.