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Offer description

📍 Location: Roncq (59223)

📅 Desired start date: September 2026

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About Weenav:

Our company : Weenav is a French start-up based in Roncq (Lille Metropolis), founded by three engineers who were childhood friends — two specialists in intelligent electric vehicles and one expert in information technology. Our core business: to design, equip and integrate high-power electric and hybrid engines on new or existing boats, in the service of cleaner and more pleasant navigation.

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Our products:

• KRONOS : Powerful and flexible electric outboard motor, designed for fast boats and dynamic navigation, combining performance and responsiveness.

• ARION : Robust and silent electric inboard motor, integrated into the hold for smooth propulsion, without vibrations, offering optimal navigation comfort.

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A turnkey offer : Beyond products, Weenav supports its customers from end to end: technical studies, custom design, on-board integration, regulatory compliance. This integrated approach makes Weenav a trusted partner in a maritime market in profound transformation.

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A promising positioning : With 35 million boats in circulation in the world and a market potential estimated at 16 billion dollars over the next decade, Weenav is located at the crossroads of energy transition and demanding nautical uses: sustainability, performance, silence.

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Background of the internship

As part of the continuous development of our KRONOS electric outboard motor, Weenav wants to integrate a TRIM system into its architecture to dynamically adjust the inclination of the engine in relation to the transom. This device is essential to optimize the boat's attitude according to speed, load and sea condition, and thus improve hydrodynamic performance, energy consumption and navigation comfort.

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Main missions

Under the supervision of the technical team, you will take charge of the design of the KRONOS engine TRIM system. As such, your missions will be as follows:

• Analysis of the need and technical monitoring: study the internal specifications, benchmark existing solutions on the nautical market (hydraulic, electromechanical, mixed actuation) and identify the applicable normative constraints (marine environment, IP, CEM).

• Mechanical design: define the kinematic architecture of the system, size the parts (forces, fatigue, choice of marine materials), model the whole in CAD and produce the associated manufacturing plans.

• Choice and integration of the actuator: compare the actuation solutions (hydraulic cylinder vs electric cylinder) according to the criteria of power, compactness, reliability and cost, then select the solution most suited to the KRONOS architecture.

• Prototyping and testing: create a functional prototype or have it produced, define and execute a test plan (load resistance, endurance, tightness, response time), then analyze the results to iterate on the design.

• Technical documentation: write the definition file (calculation notes, plans, nomenclature), the test report and contribute to the elements of the EC conformity file.

The intern may also be required to participate in other tasks and other projects in the workshop or in the mechanical design of the company depending on the needs and activities of the moment.

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Profile wanted

• Engineering school student (Bac+4/Bac+5), with a specialization in mechanical design, mechatronics or mechanical engineering.

• Good knowledge of CAD software (knowledge of the 3DExperience platform and SolidWorks is a plus).

• Skills in mechanical dimensioning (RDM, force calculations, fatigue resistance), choice of materials and manufacturing processes.

• Notions of hydraulics and/or electromechanical actuation.

• Practical sense and ease in the workshop: the project involves regular back and forth between CAD and prototyping.

• Rigor, autonomy, curiosity and team spirit.

• Proficiency in technical English to read supplier documentation.

• An interest in the nautical sector would be appreciated.

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What we offer

• A rewarding experience in a fast-growing start-up

• Supervision by experienced and passionate professionals

• Direct involvement in innovative projects with a high environmental impact

• A corporate culture based on learning, autonomy and team spirit

• Gratuity according to legal scales

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Candidacy

To apply, please send your CV and a cover letter to recrutement@weenav.com with the subject line “TRIM Mechanical Design Engineer Internship Application - [Name First Name]”. We look forward to discovering your profile and welcoming you to our dynamic team!