Product Development Engineer

About Dioxycle

Dioxycle is pioneering breakthrough carbon utilization technologies that convert industrial emissions into sustainable chemicals with unprecedented energy and cost efficiency. By displacing fossil fuels for the production of key chemicals, Dioxycle has the potential to ultimately reduce over 800 million tons of CO2 per year, representing over 2% of the world's emissions. At the core of our process is a novel "carbon electrolyzer", a machine capable of using just electricity and water to convert carbon emissions back into valuable everyday essential chemicals. Our team is innovating across chemical, mechanical and system engineering to turn carbon transformation into an economically feasible, industrial reality through this completely novel technological approach. Having completed our industrial‑scale electrolyzer prototype, we are now working with our chemical and downstream offtakers towards First‑of‑a‑kind plant deployment and subsequent commercial roll‑out. We are supported by world‑class funders including Bill‑Gates‑founded Breakthrough Energy Ventures, Lowercarbon Capital and Gigascale Capital and have raised $40M to date. We operate from two centers in Paris and California.

Your Mission

Dioxycle is seeking a Product Development Engineer to join our design team. You will work on end‑to‑end development of our electrolyzer stacks, at the intersection of mechanical design, breakthrough electrochemistry and manufacturing – taking concepts from CAD to physical reality and iterating fast. This is a role for someone who thinks rigorously, builds pragmatically and isn’t afraid to get into the details of a component tolerance or a supplier negotiation. You will have real ownership over a core piece of our technology. The problems are hard, the impact is direct, and the work is never boring.

Key Responsibilities

• Design new electrolyzer stacks using CAD software, from early concept to detailed drawings
• Dimension and validate components (manifolds, bipolar plates, sealing systems, compression systems) using theoretical calculations and computational simulations
• Own innovative product design initiatives in close collaboration with the stack team, chemistry team and scale‑up team
• Lead manufacturing planning, procurement, and supplier relationships for the stack product

Abilities and Expertise We Are Looking For

• 4+ years of hands‑on experience in mechanical design
• Strong knowledge of mechanical parts and computer‑aided design (CAD) – a requirement
• Solid experience in Product Lifecycle Management for design documentation and revisioning
• Manufacturing experience is strongly appreciated
• Solid theoretical knowledge in fluid mechanics, thermal management, solid mechanics (compression, material resistance) – a nice‑to‑have
• Good knowledge of suppliers for prototype components manufacturing
• Experience in electrolyzer or fuel cell stack design such as hydrogen electrolysis or chlor‑alkali electrolysis – a nice‑to‑have but not a requirement
• English is our daily work language

Mindset We Are Looking For

• Exemplary work ethic and self‑driven attitude: you get things done fast and to a high standard and you don’t drop the ball
• "Street‑smart": you don’t take no for an answer and will figure out a way to solve anything with the means available
• Commitment to the mission and ambition and to creating a kind, high‑performance and fun atmosphere at work (100% on‑site role)
• Passion for innovation and problem‑solving attitude
• Dedication to investing time and effort for the betterment of the team
• Going the extra 20% that makes a good deliverable into an outstanding deliverable
• Humble, low‑ego and curious

What We Have To Offer

• Unique journey: an early‑stage company with a world‑class team and a flat structure
• Impact: building a product that will reshape century‑old industrial processes for a better, more sustainable and resilient world
• People‑first: we love our people and are excited to see one another each morning at work
• Feedback over ego: we are self‑improving while helping others grow; we are no‑ego doers and all are responsible for shaping the company
• International team: over 17 nationalities and many more to come
• Fun: we constantly strive to cultivate a great work atmosphere and organize regular team events
• Competitive compensation packages
• Generous Employee Stock Ownership plans
• Health insurance: medical, dental and vision coverage
• Ergonomic workstations and state‑of‑the‑art equipment

Equal Employment Opportunity

We are an equal opportunity employer and welcome applicants from all backgrounds. All qualified applicants will receive consideration for employment.