Senior Project & Equipment Mechanical Engineer

About LeydenJar

At LeydenJar Technologies, we’re on a mission to redefine the future of energy storage. Our goal is to become the world’s innovation leader in advanced battery anodes, empowering the next generation of batteries that drive progress.

Why does this matter? Because the world needs higher energy density batteries not just for better consumer electronics, but for electric vehicles, e-flight, and beyond. While the battery industry typically advances by only 3% per year, our breakthrough pure silicon anode technology delivers an improvement of up to 70%ma true game changer. Often called the “holy grail” of the battery industry, our technology unlocks new possibilities for electrification, sustainability, and resilience in global supply chains.

What we do:

• We produce pure silicon anode rolls that fit seamlessly into existing battery cell manufacturing lines, enabling customers to make a quantum leap in performance or create entirely new product categories.

• Our initial focus is on consumer electronics, with automotive applications already in development.

• By leveraging semiconductor thin-film technology (plasma deposition) and scaling it to battery anodes, we’ve overcome the long-standing challenges of silicon in batteries, delivering durability and efficiency at scale.

To meet global demand, we’re scaling up:

• PlantOne in Eindhoven opens in 2026, producing anode rolls and validating our roll-to-roll production tools.

• PlantTwo, our large-scale production facility, will follow, establishing LeydenJar as a key player in the global battery market.

This is an enormous opportunity and an ambitious journey. It requires bold, creative, and diverse minds who share our passion for innovation and sustainability. At LeydenJar, we value different perspectives, inclusive collaboration, and gender equality because we know that diversity fuels breakthrough ideas.

We are seeking a highly skilled Senior Project & Equipment Mechanical Engineer to take on a dual-role position, starting immediately and evolving through 2026 and beyond. You will support the successful delivery of the first silicon anode plant in Europe, to be situated in Eindhoven. You will lead the specification, design coordination, and installation oversight of all mechanical utility systems, such as HVAC, process cooling, dust management systems, gas distribution, and safety infrastructure and From 2027 onwards – You will transition into the Production Department, responsible for maintaining and improving equipment performance across the facility, with a strong focus on vacuum deposition systems and all ancillary equipment & utilities required to run these. You will ensure the reliability, maintainability, and safety of both equipment and infrastructure, while mentoring technical staff and driving continuous improvement.

What will be your responsibilities?

Phase 1: Project Phase (until end of 2026)

• Owner of process and tool utility requirements and technical specifications for mechanical systems (e.g. HVAC, process gases, cooling water, air, dust management).

• Produce plant-wide FMEA and HAZOP and manage the design and procurement of a factory safety system to mitigate all identified risks.

• Coordinate with design partners, contractors, and equipment vendors to ensure mechanical systems meet technical, functional, and safety requirements.

• Provide technical review of engineering drawings, installation plans, P&IDs, and equipment layouts.

• Oversee mechanical installation work on site; monitor progress, quality, and compliance with specifications.

• Act as first point of contact for utility system queries from suppliers, installers, and internal stakeholders.

• Support system commissioning and performance testing, including FAT/SAT coordination.

• Identify and resolve engineering conflicts or installation issues that may arise during fit-out.

• Ensure long-term maintainability is considered in all plant infrastructure designs.

• Document decisions, changes, and as-built conditions for future operations and maintenance.

Phase 2: Production Phase (from 2027)

• Ensure optimal performance of vacuum deposition equipment through preventive and corrective maintenance.

• Lead continuous improvement initiatives to increase uptime, reliability, and process performance.

• Maintain and improve technical documentation, procedures, and safety systems.

• Build and manage a critical spare parts strategy and an efficient safety stock to support uninterrupted equipment operation.

• Coach and support technicians and junior engineers.

• Manage maintenance-related contracts and vendors.

• Responsible for plant-wide utility system performance, including HVAC, compressed air, and process gases.

• Drive compliance with safety, environmental, and quality standards.

• Provide technical input and operational support to future factory construction and engineering projects, ensuring equipment and infrastructure design aligns with long-term maintenance and performance requirements.

About you:

• Bachelor’s degree in Mechanical Engineering, Mechatronics, or Industrial Engineering.

• Minimum 5 years' experience in mechanical systems engineering.

• Excellent knowledge of vacuum systems, preferably experience with PECVD.

• Demonstrated experience leading installation or fit-out projects.

• Strong understanding of mechanical design, utility systems, and maintenance best practices.

• Technical drawings, P&IDs, and process flow diagrams: able to produce or effectively manage the production of, as well as read and review these.

• Comfortable working in a fast-paced scaleup environment

• Fluent in English; Dutch is a plus.

Tools & Systems Knowledge (Preferred)

• Vacuum systems (e.g. PECVD, CVD)

• HVAC and process cooling systems

• CAD tools (e.g., AutoCAD, SolidWorks)

• CMMS or asset management tools

• Risk analysis (FMEA, HAZOP)

Working Requirements

This is a hands-on role across both the project and production phases. To succeed in this position, and to support the team effectively, you’ll need to be on-site most of the time.

Phase 1 – Project Phase (through to end of 2026):
You will be part of the Eindhoven factory project team, based at Strijp-TX. On-site presence is expected 4–5 days per week. Occasional travel to equipment vendors or tool builders may be required during installation and commissioning.

Phase 2 – Production Phase (from 2027 onwards):
Once you transition to the Production Department, your role will remain hands-on and site-based. On-site presence of 4–5 days per week is expected, though flexible working can be accommodated when possible.

Competencies:

• Teamwork- Independently and consistently demonstrates the ability to work effectively, collaboratively and respectfully in a cross-functional, diverse team of multiple nationalities and backgrounds. The team spans project, supplier, R&D & operations teams.

• Problem Solving - Applies systematic troubleshooting and root cause analysis.

• Technical Leadership- Leads technical scope with suppliers and internal stakeholders. Develops technical solutions to recurring problems; leads design reviews and proactively recommends improvements.

• Drive & Initiative - Takes ownership of technical results across project and operations. Sets and pursues challenging technical goals to improve plant performance.

• Concern for Excellence - Enforces and exemplifies high standards in engineering, documentation, and execution.

• Adaptability - Works effectively and resiliently in a scale-up environment with changing priorities.

• Customer Orientation- Designs and maintains systems that minimize downtime and support production.

Why LeydenJar?

• Unleash Your Potential: Step into a workplace where growth and ownership go hand in hand. We empower every individual regardless of background, gender, or identity to thrive and achieve their career aspirations.

• Pension & Insurance Security: We care about your future. LeydenJar contributes 10% on top of your monthly gross salary toward your pension and life insurance, ensuring long-term security for you and your loved ones.

• Recharge & Refresh: Enjoy 25 vacation days per year (based on full-time hours) because work-life balance is essential for everyone.

• Travel Made Easy: We cover your home-to-work travel costs with €0.23 per kilometer or provide an NS Business Card for hassle-free public transportation.

• Continuous Learning: Access our online learning platform (Udemy) to develop your skills and unlock new opportunities for personal and professional growth.

• Diverse, Inclusive & Equal: Be part of an international team of 20+ nationalities, where everyone’s voice matters, and where diversity, equity, and inclusion are more than values they’re actions.

• Community & Connection: From team-building events and monthly lunches to year-end celebrations and inclusive gatherings, we create spaces where everyone feels welcome and engaged.

  

Are you ready to take on the challenge as a Senior Project & Equipment Mechanical Engineer ?

We are looking forward to your application!

If you'd like to learn more about LeydenJar amazing team, see below:

At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.