About LeydenJarAt 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:<ul><li>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.</li><li>Our initial focus is on consumer electronics, with automotive applications already in development.</li><li>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.</li></ul>To meet global demand, we’re scaling up:<ul><li>PlantOne in Eindhoven opens in 2026, producing anode rolls and validating our roll-to-roll production tools.</li><li>PlantTwo, our large-scale production facility, will follow, establishing LeydenJar as a key player in the global battery market.</li></ul>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.<img src="https://recruitee-main.s3.eu-central-1.amazonaws.com/uploads/3r6nrk3p82/2025-07-21_LeydenJar0062.jpg">Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world? Interested to work for LeydenJar? Let us know what you can bring to our company! 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.You Live Our Values1. Dare to Pioneer At LeydenJar, we believe in bold moves. Turning a failed innovation from another industry into a breakthrough battery technology is bold. Choosing to aim for 70% higher energy density when the norm is 3% is pioneering. Building an international, diverse team takes courage. While we remain humble, bravery is in our DNA. When faced with two similar options, we choose the one that challenges us the most—because that’s how true innovation happens.2. Question Everything – Answer with Data Innovation starts with curiosity. We challenge the status quo, just as we did when LeydenJar was founded. Here, every voice matters there are no dogmas, no “untouchable” ideas. We welcome suggestions, healthy debates, and feedback shared with positive intent. In return, we back up our answers with data and research, ensuring that our decisions are grounded and impactful.3. Own Setbacks and Success We believe in transparency and teamwork, especially when the road gets tough. We celebrate our breakthroughs and we share and learn from failures with the same energy. We take responsibility, we support one another, and we climb the highest mountains together.4. Prioritize Action We are a fast-growing, dynamic company with a strong can-do mentality. When faced with a choice between inaction and progress, we take action. That mindset has brought us where we are today and it will take us even further.5. Empower an Optimistic Future We know why we’re here: the future is exciting. Electrification is shaping a cleaner, smarter world, and our technology makes that future possible. Without next-generation batteries like ours, energy will remain unsafe, inefficient, or unscalable. We choose to focus on solutions and positive change, because optimism drives progress.<img src="https://recruitee-main.s3.eu-central-1.amazonaws.com/uploads/5n379dy4v5/2025-07-21_LeydenJar0100.jpg">

LeydenJar Technologies boosts the energy density of li-ion batteries by replacing the traditional graphite anode with a nanoporous, pure silicon anode. This yields cheaper (-20% costs), greener (-85% CO2 footprint) and higher energy density batteries (+70% as compared to state-of-the-art, 1350Wh/L).


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About LeydenJarAt 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:<ul><li>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.</li><li>Our initial focus is on consumer electronics, with automotive applications already in development.</li><li>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.</li></ul>To meet global demand, we’re scaling up:<ul><li>PlantOne in Eindhoven opens in 2026, producing anode rolls and validating our roll-to-roll production tools.</li><li>PlantTwo, our large-scale production facility, will follow, establishing LeydenJar as a key player in the global battery market.</li></ul>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.<img src="https://recruitee-main.s3.eu-central-1.amazonaws.com/uploads/3r6nrk3p82/2025-07-21_LeydenJar0062.jpg">Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world? Interested to work for LeydenJar? Let us know what you can bring to our company! 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.You Live Our Values1. Dare to Pioneer At LeydenJar, we believe in bold moves. Turning a failed innovation from another industry into a breakthrough battery technology is bold. Choosing to aim for 70% higher energy density when the norm is 3% is pioneering. Building an international, diverse team takes courage. While we remain humble, bravery is in our DNA. When faced with two similar options, we choose the one that challenges us the most—because that’s how true innovation happens.2. Question Everything – Answer with Data Innovation starts with curiosity. We challenge the status quo, just as we did when LeydenJar was founded. Here, every voice matters there are no dogmas, no “untouchable” ideas. We welcome suggestions, healthy debates, and feedback shared with positive intent. In return, we back up our answers with data and research, ensuring that our decisions are grounded and impactful.3. Own Setbacks and Success We believe in transparency and teamwork, especially when the road gets tough. We celebrate our breakthroughs and we share and learn from failures with the same energy. We take responsibility, we support one another, and we climb the highest mountains together.4. Prioritize Action We are a fast-growing, dynamic company with a strong can-do mentality. When faced with a choice between inaction and progress, we take action. That mindset has brought us where we are today and it will take us even further.5. Empower an Optimistic Future We know why we’re here: the future is exciting. Electrification is shaping a cleaner, smarter world, and our technology makes that future possible. Without next-generation batteries like ours, energy will remain unsafe, inefficient, or unscalable. We choose to focus on solutions and positive change, because optimism drives progress.<img src="https://recruitee-main.s3.eu-central-1.amazonaws.com/uploads/5n379dy4v5/2025-07-21_LeydenJar0100.jpg">

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