Careers

Join Us in Shaping the Future of Programmatic Advertising

At One Tech Group, we build cutting-edge technology solutions for Digital Out-of-Home (DOOH) & Retail Media. Be part of an innovative team that drives the next generation of programmatic advertising.

What You Can Expect

We’re not just building technology — we’re building a workplace where people thrive.
Innovation, collaboration, and flexibility are part of our DNA. Here’s what you can look forward to when joining our team.

Innovation First

Work with leading-edge technologies in programmatic advertising and DOOH & Retail Media. Whether you’re coding backend logic or optimizing media delivery, your work directly impacts the future of digital media. Innovation isn’t just encouraged — it’s expected.

Agile Environment

Our flat hierarchies and fast decision-making structures empower you to act, adapt, and move forward quickly. You’ll work in cross-functional teams with direct access to decision-makers — no unnecessary red tape, just results.

Flexible
Work

We believe flexibility is the key to productivity and well-being. Choose from hybrid working models and benefit from adjustable working hours that allow you to balance your personal and professional life.

Career
Growth

Your development counts: Through workshops, training budgets, mentoring, and personalized learning paths, we support your growth and long-term success — because your personal and professional progress is our shared achievement.

Team
Culture

Join a diverse, open-minded team where collaboration, knowledge-sharing, and mutual respect define our everyday culture. We work hard, celebrate our wins, and grow together. Regular company events, sports activities, and creative office spaces ensure there’s always room for inspiration, connection, and fun.

Extras

We believe that great work thrives on great conditions. We offer flexible working hours, part-time options, and remote-friendly setups. Choose your preferred devices and take advantage of extras like job ticket, job bike, employee discounts and meal subsidies.

Current Opportunities

We are looking for talented individuals who want to drive the future of digital media with us.

Accounting & Commercial Administration (m/f/d) – Düsseldorf
Your Role

You own the day-to-day accounting at our Düsseldorf office — from daily bookings to closing preparation. You’ll work closely with our Finance lead in Düsseldorf and the operational teams on site. This is a part-time role of approx. 30 hours per week, based in our Düsseldorf office.

What you’ll be doing:
  • Financial accounting: You independently manage the ongoing financial accounting for the Düsseldorf location.
  • Accounts receivable & payable: Invoice verification, account assignment, and document management are in your hands.
  • Open items & dunning: You monitor and resolve open items, post incoming payments, and run the dunning process.
  • Bank accounting: You handle ongoing bank accounting and reconcile bank accounts.
  • VAT: You prepare the advance VAT returns.
  • Closings: You prepare monthly and annual financial statements together with our tax advisor.
  • Billing: You support client and agency billing, including credit notes and corrections.
  • Expenses & travel costs: You review and process expense and travel cost reports.
  • Commercial administration: Contract and document filing, acting as the interface to service providers, and supporting HR and office topics at the Düsseldorf location.
  • Reporting: You maintain and prepare analyses and reports.
What You Bring
  • Education: You’ve completed a commercial apprenticeship, ideally with further qualification as a financial accountant or tax clerk.
  • Experience: You bring several years of professional experience in financial accounting.
  • Software: You’re confident with common accounting software (e.g. DATEV, Lexware Office, sevDesk) as well as MS Office / Google Workspace.
  • Work style: You work in a structured, careful, and independent way — and keep track even when several topics run in parallel.
  • Discretion: You handle sensitive financial and personnel data with absolute reliability.
  • Process mindset: You enjoy not just running processes, but making them cleaner and simpler.
  • Language skills: You’re fluent in German, written and spoken; English is a plus.

Apply now

Didn’t Find the Right Role? Apply Anyway!

We’re always on the lookout for talented, curious minds — even if there’s no open position that matches your profile right now.
If you’re passionate about digital media, technology, and shaping the future of programmatic advertising across DOOH, Retail Media, and In-Store environments, we’d love to hear from you.

Tell us what you’re great at, what drives you, and how you want to contribute.
Let’s explore what we can build together.

Apply now

Our Hiring Process

We believe a great hiring process should be fast, clear, and respectful. Here’s what you can expect when applying at One Tech Group:
Step 1
Step 1
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Online Application

Submit your application quickly and easily — just your resume and a few words about what drives you. We’re curious to get to know you!
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Step 2
Step 2

Screening & First Contact

Our People & Culture team reviews your application. If there’s a potential match, we’ll schedule an initial call to get to know each other better.
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Step 3
Step 3

Team Interview

You’ll meet your future colleagues and team leads in a more in-depth interview. Together, we’ll explore your experience, expectations, and ideas.
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Step 4
Step 4

Expert Interview or On-site Meeting

In this step, we go deeper into your professional skills and role-specific topics. Depending on the position, the interview takes place remotely or at our office in Düsseldorf.
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Step 5
Step 5

Offer & Onboarding

If everything aligns, you’ll receive your offer and we’ll start planning your onboarding. From day one, you’ll be part of a motivated team shaping the future of programmatic media.
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Apply Now

We’re excited that you’re interested in joining One Tech Group!
We’re looking forward to learning more about you and what drives your passion for tech, media, and innovation.

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One platform, many features.
All in one for your media success!

Create campaigns, store all your creatives and manage your ad activities.
Monetize your inventory programmatically and optimize it in real-time.
Use 1st and 3rd party data to enrich your campaigns and target groups.
Manage your entire DOOH network in one single platform.                          
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