About Lprint
LPRINT is a French deep-tech start-up, supported by INRIA, X-Up, and École Polytechnique. We are developing an innovative 3D printer for the additive manufacturing of industrial-grade multilayer printed circuit boards (PCBs). Our mission is to transform the way PCBs are designed and manufactured — enabling faster, more flexible, and more sustainable production that empowers hardware engineers and product development teams.

Internship mission

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You'll work closely with our CTO on the core product. Your primary goal is to contribute to the R&D of our printing processes and functional materials, helping to push the boundaries of what our laboratory prototype can achieve on 2D and 3D substrates.

• Characterise and test functional inks and conductive materials on various substrates.
• Develop and optimise printing processe.
• Contribute to the design and prototyping of printed electronic circuits.
• Evaluate printed structures using standard characterisation techniques (electrical, morphological, adhesion).
• Document experiments and contribute to internal R&D reporting.

Requirements

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You are able to manage demanding hands-on projects with rigorous methodology, while thriving in a collaborative and fast-paced startup environment. You are eager to take ownership and learn.

• Interest in printed electronics, functional materials, or additive manufacturing processes.
• Familiarity with inks/functional fluids, substrates, interfaces, and adhesion concepts.
• Knowledge of printed circuit design principles.
• Experience with characterisation tools and laboratory instrumentation.
• Rigorous documentation habits and attention to detail.
• Fluent English.
• Currently completing a Master's in Sustainable Printed and Integrated Electronics (e.g. Grenoble INP – Pagora e.PEPS).

Nice to have

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• Experience with 3D printing on complex shapes.
• Familiarity with lifecycle analysis (LCA) and ecodesign methodologies.
• Interest in electronics end-of-life and sustainable innovation.
• Knowledge of antenna design or RF prototyping.
• Ability to work independently and take initiative.

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