At zerothird (zerothird.com), we’re building the future of secure communications. As a fast-scaling quantum technology company, we specialize in entanglement-based Quantum Key Distribution (eQKD) — the most advanced, physically unbreakable encryption method available today. Based on Nobel-Prize winning research, our systems enable critical infrastructure, telecom providers, and enterprise customers to protect their networks against both today’s threats and tomorrow’s quantum attacks.

We are hiring a finance professional who enjoys working hands-on, thrives in dynamic environments, and wants to have real impact on the future of our company. Join us as Finance & Administration Manager and take on a key role at the heart of our operations!

In this role, you will work side-by-side with the CFO and take ownership of critical finance and administrative processes. You’ll not only keep our numbers sharp and our reporting on point – you’ll also play a central part in building up our ERP system (Odoo) and helping the entire organization work more efficiently.

This position is ideal for someone who enjoys a wide range of responsibilities, values autonomy, and is excited about growing into the internal expert and go-to person for all things finance and ERP.

In more detail:

• You ensure smooth day-to-day accounting in cooperation with our external tax advisors
• You support the preparation of financial statements and audits
• You help with budgeting and financial planning
• You manage the administration and financial control of national and international grant projects
• You actively contribute to the implementation of our ERP system (Odoo) – and develop into our internal ERP Key User
• You prepare financial insights and materials for shareholders and key meetings
• You take care of essential administrative workflows that keep our company running smoothly

• At least 5 years of professional experience in finance, accounting, or controlling
• A degree in business, finance, accounting – or equivalent practical experience
• Accountant or tax advisor training is a plus
• Strong analytical mindset and a hands-on, structured working style
• Excellent Excel skills , PowerPoint and ERP (especially Odoo) experience are a plus

• High Impact: Join at the intersection of Nobel-Prize winning quantum physics and secure communications — and help shape solutions that will protect global infrastructure for decades.
• Vibrant Quantum Community: Join a young and ambitious team with a strong spirit of collaboration, regular team-building events, and a shared passion for meaningful tech. Enjoy rooftop coffee breaks overlooking Vienna’s Wienerberg.
• Family-Friendly Workplace: We support flexible schedules and work arrangements to help you balance your professional drive with personal priorities and family duties.
• High-Growth Opportunity: Be part of one of the most exciting sectors in deep tech. As demand for quantum-secure communication accelerates, you'll have the opportunity to shape new markets — and grow with us.
• Inclusive Culture: We believe in "Duz-Kultur”, flat hierarchies, and fast, transparent communication.
• Targeted Onboarding & Learning: You’ll receive a tailored onboarding and a dedicated mentor to help you ramp quickly and succeed. Stay sharp with access to training, coaching, and market insights.
• Extras That Count: Enjoy premium coffee, fresh fruit, team lunches, and summer & holiday events when working from our Vienna HQ.

A competitive salary significantly above the collective agreement minimum of EUR 48.894,02 gross per anno , depending on your qualifications and experience.

Ready to Apply?

Send your CV and a short motivation letter!

This position is based in Vienna only. We’re reviewing applications on a rolling basis — if you're ready to be at the center of quantum-secure innovation and help shaping the financial backbone of a growing tech company, we’d love to meet you.