Renaissance Fusion (RF) is the first Magnetic Confinement Fusion company in the EU. We are building the first net-energy producing stellarator by combining proprietary innovations in modular design, the manufacturing of next-generation High-Temperature Superconducting (HTS) magnets, and liquid-metal (LM) walls. We are forming a team of the brightest, most driven scientists and engineers to realize and commercialize our non-fusion products within 2 years and integrated fusion solutions within 10 years.

Our team is agile, international, and based in the exciting city of Grenoble, by the French Alps.

Our Liquid Metal department develops key technologies for Renaissance Fusion projects: liquid metal walls, circulation systems, heat exchangers, complex conduits, high temperature diagnostics, and infrastructures enabling the handling of liquid metals in vacuum environments and under extreme constraints.
These systems require high precision mechanical design, perfect materials expertise, and close integration with the vacuum, thermal, process, instrumentation, and magnetic teams.

We are looking for a skilled Designer to join our Liquid Metal team. In this role you will design, model, and industrialize mechanical parts and subassemblies involved in the handling and shaping of liquid metals, considering thermal, geometric, mechanical constraints, and compatibility with vacuum and experimental systems.

Responsibilities

• Design tanks, pipes, flow systems, mechanical supports, and high‑temperature components that will form the experiments conducted in the department

• Produce accurate 3D models (structures, piping, chambers, interfaces, tooling) for systems using liquid metal

• Produce detailed 2D drawings, tolerances, and fabrication‑ready documents

• Participate in the assembly and potentially in the operation of the designed elements

• Participate in multidisciplinary design reviews

• Create and maintain technical documentation (definition files, nomenclature, procedures, notes)

• Support manufacturing, assembly, and integration on R&D test benches

• Contribute to optimizing mechanical solutions and propose concrete improvements

Integrate the specific constraints of the department:

• Vacuum / ultra‑high vacuum compatibility

• High‑temperature thermal management

• Liquid metal safety and containment

• Complex geometries for flow dynamics

• Consideration of high magnetic fields

Work closely with:

• Engineers (mechanical, thermal, hydraulic)

• Vacuum team

• Instrumentation and sensors

• Materials and cryogenics

• Processes and safety

Requirements

Don't hesitate to apply even if you don't match all the requirements. Superheroes don't exist, but people with passion and talent do.

Education and professional experience

• BTS / DUT / Bachelor’s degree in mechanical design or equivalent

• At least 5 years of experience in a design office

• Experience in an R&D, energy, or experimental equipment environment is much appreciated

Languages

• English (C1)

• French (B1 or more) is a plus

Technical skills

• Excellent command of a 3D CAD software (Inventor, SolidWorks, Catia...)

• Very good knowledge of complex assembly design, ISO / GD&T tolerancing, metallic and high temperature materials, machining / welding / manufacturing of scientific parts

• Experience in one of the following fields is a plus: vacuum systems, thermal design, fluids or metallurgy, special machines

What we offer

Visit our career page to learn more about our work environment and benefits.

At Renaissance Fusion, we value diversity and are an equal opportunity employer. We consider all qualified applicants equally for employment. We do not discriminate on the basis of origin; gender; morals, sexual orientation; sexual identity; age; marital status; pregnancy; genetic characteristics; actual or assumed membership or non-membership of an ethnic group, nation or race; political opinions; trade union or mutualist activities; religious beliefs; physical appearance; family name; place of residence; state of health; disability.