Founding Hardware Engineer

Arsenals AI

Paris

Sur place

EUR 80 000 - 110 000

Plein temps

14 jours+

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Résumé du poste

Arsenals AI is seeking a Founding Hardware Engineer in Paris to own the physical heart of our underwater systems. From prototype to sea-proven products, you will design, prototype, test, and iterate across mechanical, electrical, and software boundaries.

You will move between CAD, electronics bench, and the water, shaping the company as an early employee and leading major projects. Must have 7+ years of hardware experience and hands-on fabrication skills.

Qualifications

Graduate from a top engineering school or university.
7+ years of hardware engineering experience with shipped or field-tested hardware.
Fast prototyper with hands-on fabrication (machining, 3D printing, composites, wiring).
Fluent in CAD (SolidWorks, Fusion 360, Onshape) and mechanical analysis (FEA).
Strong systems thinking across mechanical, electrical, and software boundaries.
End-to-end ownership from requirements to production-ready hardware.

Responsabilités

Own end-to-end development of core hardware subsystems: mechanical structures, pressure hulls, propulsion, electronics integration, payload interfaces.
Design, prototype, and validate innovative solutions from sketch to sea trials.
Design for underwater environment: pressure, corrosion, sealing, buoyancy, thermal management, shock/vibration.
Build test infrastructure to validate hardware quickly and rigorously.
Take designs from prototype to small-series production: DFM/DFA, supplier selection, sourcing, quality control.
Build and lead a future team of engineers (hiring, onboarding, standards, delivery).

Connaissances

Fast prototyping

Systems thinking

Hands-on fabrication

Problem solving

Leadership potential

Formation

Engineering degree (top school/university)

Outils

SolidWorks

Fusion 360

Onshape

FEA

3D printing

Machining

CAN/UART/SPI/I2C

Description du poste

About Arsenals AI

Arsenals AI builds autonomous underwater systems to transform the future of democratic navies. We design and manufacture full-stack products—embedded electronics, autonomy software, and production hardware—built for harsh, real-world environments.

We’re an early team. If you join, you will shape the technical foundations, culture, and velocity of the company.

About the role

As a Founding Hardware Engineer, you will own the physical heart of our systems and push them from prototype to field-ready, sea-proven products.

This is not a narrow role. You will architect, design, prototype, test, debug, integrate, document, and iterate—often with incomplete information and aggressive timelines. You will move between CAD, the electronics bench, the machine shop, and the water, sometimes in the same week.

As one of the company’s first employees, you will play a major role in shaping the company and building and leading major projects that operate like “companies within the company”.

We are looking for the best engineers who are committed, passionate about the mission of transforming democratic navies, and thrilled by the major technical challenges ahead.

Responsibilities

Own end-to-end development of core hardware subsystems: mechanical structures, pressure hulls, propulsion, electronics integration, and payload interfaces.
Design, prototype, and validate innovative solutions that no one has ever done—from first sketch to sea trials.
Design for the underwater environment: pressure, corrosion, sealing, buoyancy, thermal management, and shock/vibration.
Build the test infrastructure (benches, jigs, pressure/environmental testing, instrumentation) to validate hardware fast and rigorously.
Take designs from prototype to small-series production: DFM/DFA, supplier selection, sourcing, quality control, and assembly processes.
Build and lead a future team of engineers (hiring, onboarding, setting standards, and owning delivery).

Candidate requirements (must-have)

Graduate from a top engineering school or university.
7+ years of hardware engineering experience (mechanical, mechatronics, electromechanical systems) with evidence of shipped or field-tested hardware.
Fast prototyper: able to design, build, test, and iterate quickly with real-world feedback—comfortable with hands‑on fabrication (machining, 3D printing, composites, wiring).
Fluent in CAD (e.g., SolidWorks, Fusion 360, Onshape) and mechanical simulation/analysis (FEA, structural, thermal).
Strong systems thinking: reason about system‑level trade‑offs (mass, cost, reliability, manufacturability, maintainability) across mechanical, electrical, and software boundaries.
Own a subsystem end-to-end—from requirements and architecture to validated, documented, production‑ready hardware—and be eager to learn in a fast‑evolving environment.
Solutions‑first mindset: you look for ways to make things work, not reasons they won’t.

Preferred skills (nice-to-have)

Marine or underwater hardware experience: pressure vessels, subsea connectors, sealing (O-rings, penetrators), anti‑corrosion design, buoyancy and trim.
Propulsion and actuation experience: thrusters, motors (BLDC), ESCs, control surfaces, gearboxes.
Electronics engineering experience: PCB design and bring‑up, power electronics, battery systems (Li‑ion pack design, BMS, safety), harness design.
Familiarity with embedded systems and how hardware choices affect software (sensors, buses like CAN/UART/SPI/I2C, EMI/EMC considerations).
Experience with hydrodynamics or fluid dynamics (CFD, hull/fairing design, drag and stability analysis).
Experience taking hardware from prototype to production: DFM/DFA, supplier and contract‑manufacturer management, BOM and cost management, quality processes.
Experience with environmental qualification and testing (pressure, ingress, thermal, shock, vibration, salt fog) and relevant standards.
Experience operating hardware in harsh environments (marine, aerospace, automotive, defense).

Practical details