Junior Sales Administrator (m/f/d) - part-time

About the Role

Behind every delivered system is a series of commercial steps that need to be handled accurately - from preparing offers and processing sales orders to maintaining complete documentation. As Junior Sales Administrator at ARX Robotics, you will support the day-to-day administration of these processes and help keep the operational backbone of our commercial team running reliably.

You will create and process sales offers, orders, invoices, and the related documentation centrally in SAP, and you will be the point of contact for the departments involved in after-sales. Your accuracy keeps our order process clean and auditable - and it gives the wider Sales team the room to focus on customers, process improvements, and strategic work. This is a strong entry point for someone who likes clear processes, reliable systems, and being the person others trust to get the details right. We start at 50–60%, with the option to increase hours as the team grows.

What You'll Build

• Create and process sales offers and sales orders in SAP, from order intake through to invoicing
• Prepare and issue invoices on time, in close coordination with Sales and
• Maintain complete and correctly filed order documentation, including order confirmations, delivery documents, and invoices
• Check order data for accuracy and completeness, and keep it up to date in
• Handle order changes, queries, and discrepancies, clarifying them early and escalating where
• Act as the point of contact for other departments involved in after-sales, including Finance, Logistics, and Mission Operations
• Support the team with recurring administrative tasks, reports, and data checks
• Provide dependable operational support that frees up senior colleagues for processual and strategic work

What You Bring

• 1–3 years of experience in sales administration, order management, back office, customer service, or a comparable commercial support role
• Experience working with ERP software. Knowledge of SAP S/4HANA is a strong
• Practical experience managing purchase orders, tracking deliveries, coordinating with suppliers, and resolving operational discrepancies.
• A structured, dependable approach and the ability to manage and monitor multiple sales orders and priorities in a fast-growing environment.
• Strong attention to detail when maintaining sales and customer data.
• Clear and friendly communication with internal stakeholders across
• Completed commercial training (e.g. Industriekaufmann/-frau, Kaufmann/-frau für Büromanagement) or a comparable qualification or degree
• Good German and English language skills, both written and
• Discretion in handling confidential commercial information

Please note: You do not need to meet every single requirement to apply. We welcome motivated candidates who are eager to grow into the role and develop their expertise further.

What We Offer

Join a mission-driven European defense tech company at a pivotal stage of growth, where you can help shape meaningful technology, take ownership early, and grow with the business!

• Competitive compensation package including a bonus opportunity
• 27 vacation days to start, increasing with tenure up to 30 days
• Employer-supported pension contribution
• Learning & development support and team events budget
• Employee discounts and flexible benefits budget via Probonio
• Hybrid working setup depending on role and team needs
• Structured salary bands, levelling framework, and bi-annual development conversations
• Referral bonus program, dog-friendly office, and relocation support where applicable

About Us

ARX is a dual-use technology company that specializes in developing autonomous unmanned systems and sensors for the European defence sector. Our dual-use unmanned ground systems and sensors assist NATO Armies and civilian first responders in tackling their most challenging problems by providing them with training and information to make better decisions and take effective actions in life-or-death situations.

As our team continues to expand rapidly, we are seeking motivated candidates who are excited to work in a highly energetic, creative, and innovative team dedicated to developing autonomous systems for challenging environments. We operate in a dynamic sector where collaboration, sharing innovative ideas, and developing novel problem-solving strategies are ingrained in our work culture.

If you are passionate about overcoming challenges that have a real impact on the security of our democracies, apply here to join ARX and help shape the future of dual-use technology!


ARX is an equal-opportunity employer, and we encourage candidates from all backgrounds to apply.

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