Finance Operations Coordinator ( Part-time)

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.

To support our rapid growth, we’re looking for a Finance Operations Coordinator to join our team on a Part-time basis (16-24 hours a week). This role is essential to keeping our financial operations running smoothly and supporting the backbone of our growing organization. If you're detail-oriented, organized, and eager to make a real impact this might be the role for you.

You will be responsible for:

1. Administrative Support:

• Assist with day-to-day administrative tasks, including answering phones, managing correspondence, and scheduling meetings.

• Coordinate travel arrangements, prepare expense reports, and maintain filing systems for financial documents and records.

• Act as a point of contact for internal and external stakeholders, providing excellent customer service and resolving inquiries promptly.

2. Data Entry and Recordkeeping:

• Enter financial data into accounting software and spreadsheets accurately and efficiently.

• Maintain up-to-date and organized financial records, including invoices, receipts, and purchase orders.

• Assist with the preparation of financial reports and presentations as needed.

3. Billing and Accounts Receivable:

• Assist with billing processes, including generating invoices, tracking payments, and reconciling accounts receivable.

• Follow up on outstanding invoices and communicate with clients to resolve payment discrepancies or issues.

• Prepare and distribute billing statements and reminders as necessary.

4. Accounts Payable Support:

• Assist with accounts payable processes, including coding invoices, obtaining approvals, and processing payments.

• Monitor vendor accounts and reconcile statements to ensure accuracy and timely payment.

• Assist with vendor inquiries and resolve billing discrepancies or disputes as needed.

5. General Finance Support:

• Provide general support to the finance team, including assisting with budget preparation, financial analysis, and special projects.

• Collaborate with team members to streamline processes and improve efficiency within the finance department.

• Stay informed about relevant financial policies, procedures, and regulations to ensure compliance

About you:

• HBO education in finance, accounting, Business administration, or a related field

• 1 year experience in Finance domain and Administrative role.

• Strong attention to detail and accuracy, with excellent organizational and time management skills.

• Ability to maintain confidentiality and handle sensitive financial information with discretion.

• Adaptability and willingness to learn new task and technologies as needed.

• Strong communication skills both written and spoken English and Dutch.

  Competencies:

• Procurement/Accounts Payable skills and knowledge

• Execution – Takes responsibility for accurate data entry, reconciliations, and task completion

• Concern for excellence – Ensures financial records and admin tasks are error-free

• Flexibility – Handles changing systems, tools, and deadlines (common in scale-ups)

• Teamwork – Works with finance team and responds to queries from other departments

  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 Finance Operations Coordinator?

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.