Mechanical Engineer - GCS

Senior Mechanical Design Engineer Full-time In-person   At Interstellar Lab, our mission is to build a future full of life, on Earth and beyond. We believe in a world where technology enables humans to live in harmony with nature, where biodiversity thrives and expands, and where terrestrial life becomes multi-planetary. To build this future, we design autonomous biospheric systems to grow plants with precision, on Earth and in Space. Our AI-powered BioPods and BioCapsules leverage biosciences to reproduce and optimize growth conditions for a wide variety of high-value plants. On Earth, we pioneer molecular and biofarming, boosting the production of metabolites and bioactive compounds while offering sustainable, traceable, and high-quality natural ingredients to the beauty, fragrance, pharmaceutical, and nutraceutical industries. In space, we collaborate with agencies and private companies to develop biofarming units that advance life science research in microgravity and lay the foundation for future biofactories in space, enabling innovative terrestrial applications and long-duration space missions.   About the Role As Senior Mechanical Design Engineer, you will lead the design and development of mechanical systems for Interstellar Lab’s biospheric technologies. You will work across the full product lifecycle, from early concepts and prototyping to manufacturing and industrialization, ensuring that every component meets performance, reliability, and cost objectives. This role requires strong ownership, curiosity, and the ability to collaborate across disciplines in a fast-paced, mission-driven environment.   Responsibilities * Lead mechanical design from concept to production, balancing performance, cost, and manufacturability * Develop 3D CAD models and detailed 2D drawings using Onshape or equivalent software * Collaborate with electrical, software, and systems engineers to ensure integration and serviceability * Manage large assemblies and ensure configuration control across design revisions * Support prototyping, testing, and validation activities to verify design performance * Optimize designs for industrialization and coordinate with manufacturing partners * Ensure compliance with design standards, reliability criteria, and DFM best practices * Participate in design reviews and provide technical guidance within the engineering team   Profile / Qualifications * Bachelor’s or Master’s degree in mechanical engineering or equivalent * 6+ years of experience in mechanical design, analysis, and manufacturing * Expertise in CAD design (Onshape, SolidWorks, or CATIA) and large assembly management * Solid understanding of materials, mechanical analysis, and industrial processes * Experience with product testing, validation, and design for manufacturability * Comfortable with hands-on prototyping and integration in workshop environments * Strong problem-solving, communication, and teamwork skills * Fluent in English, proficiency in French is a plus   Equal Opportunity Interstellar Lab is proud to be an equal opportunity employer. Interstellar Lab does not discriminate on the basis of race, regional color, national origin, gender (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with disability, or other applicable legally protected characteristics.

ABOUT US Harmattan AI is a next-generation defense prime building autonomous and scalable defense systems. Following the close of a $200M Series B, valuing the company at $1.4 billion, we are expanding our teams and capabilities to deliver mission-critical systems to allied forces. Our work is guided by clear values: building technologies with real-world impact, pursuing excellence in everything we do, setting ambitious goals, and taking on the hardest technical challenges. We operate in a demanding environment where rigor, ownership, and execution are expected. ABOUT THE ROLE As a Navigation Engineer within our Precise Navigation team, you will design and develop high-precision navigation and positioning solutions based on tightly-coupled IMU/GNSS filtering, improving localisation accuracy, integrity, and robustness to jamming and spoofing for our autonomous systems – from concept to field deployment. You will work hand-in-hand with the Navigation and Radar teams, as well as software and Electronic Warfare (EW) teams, to deliver robust, resilient Position, Navigation and Timing (PNT) and ensure overall performance, robustness and reliability. RESPONSIBILITIES * Navigation Architecture: Drive the architecture and implementation of navigation / PNT solutions for autonomous platforms. * Resilient PNT: Develop navigation resilient to GNSS degradation, jamming and spoofing (anti-jam / anti-spoof). * Sensor Fusion: Design multi-sensor fusion (GNSS, INS/IMU, RF, vision) and the associated estimation and filtering algorithms. * Testing & Validation: Design test plans (e.g. GNSS receiver testing in jamming environments), run simulations and replays, and report on findings and performance against targets. * Technical Coordination: Collaborate across HW, software, EW and ML teams on technical interfaces and system-level trade-offs. * System Reviews & Documentation: Contribute to design and architecture reviews and maintain requirements traceability and documentation. CANDIDATE REQUIREMENTS * Strong mathematical background combined with good physical intuition. * Experience with GNSS, INS/IMU and navigation/estimation filters (e.g. Kalman filtering) is a strong plus, particularly in tightly-coupled architectures. * Experience with navigation in GNSS-denied / contested environments is a strong plus. * Familiarity with RF and EW constraints (GNSS jamming / spoofing) is a plus. * Solid software / algorithm skills; combined algo + software profile rather than a pure coder. * MSc in Engineering (aerospace, robotics, EE or related); PhD is a plus. * Broad engineering culture with understanding of electrical, embedded and mechanical systems. * Rigorous, structured and mission-driven mindset with strong analytical skills. * Excellent communication and documentation abilities. We look forward to hearing how you can help shape the future of autonomous defense systems at Harmattan AI.