Job Description: HR Administrator (m/f/d) — Munich (Onsite)
Role: HR Administrator (m/f/d)
Location: Munich, Germany (onsite)
Employment: Part-time with potential to scale to full-time contract
Start: ASAP
Reporting to: COO
Key interfaces: CFO (payroll), Hiring Managers, external recruiters (occasionally), Spain team
About us
At OncoBeta, we’re redefining how the world addresses non-melanoma skin cancer (NMSC), the most common cancer globally, while leveraging our expertise and advanced infrastructure in rhenium-188 and intend to diversify our capabilities and expand our portfolio into new therapeutic areas and markets. As a growing medical device start-up, we’re pioneering radionuclide-powered therapies designed to improve patient care and challenge the status quo.
With headquarters in Munich, Germany, and affiliates in Europe, South Africa, and Australia, our mission is global, ambitious, and focused on making a difference for millions of patients worldwide.
The role
As our HR Administrator, you will run day-to-day HR administration for our EU team (currently ~20 employees). You’ll ensure smooth onboarding/offboarding, maintain accurate HR data and documentation in Personio, and prepare monthly payroll inputs for our CFO (payroll is run in-house). You’ll also support offer/contract workflows and occasionally coordinate with external recruiters. As we grow, you’ll help standardize and scale HR processes across countries, including close coordination with our Spain team.
Responsibilities
- Own employee lifecycle administration: contracts (template-based), amendments, confirmations, and standard HR letters.
- Coordinate onboarding/offboarding (checklists, document collection, internal coordination, system process triggers).
- Maintain high-quality HR master data and documentation in Personio.
- Administer time & absence workflows in Personio (tracking approvals and completeness).
- Prepare monthly payroll inputs for the CFO (changes, absences, any variable components if applicable) and manage cut-off discipline.
- Be first point of contact for employee HR admin questions; escalate complex matters to COO/CFO.
- Support offer preparation/contract workflow and occasional recruiting coordination (scheduling, recruiter liaison).
- Improve and document HR processes (templates, checklists, SOPs) and support cross-country process harmonization (incl. Spain).
- Handle employee data with strict confidentiality and comply with applicable data protection requirements.
Requirements
- ~2 years of hands-on HR administration / HR operations experience (Germany-based experience strongly preferred).
- Able to run HR admin independently for a small team with minimal supervision.
- Very strong attention to detail, reliability, and comfort with deadlines/data accuracy (especially payroll inputs).
- HRIS proficiency; Personio experience is a strong plus.
- Strong German and good English skills (international environment).
- High confidentiality and a service-oriented mindset.
Nice to have
- Experience in a growing company/scale-up where processes are still being built.
- Experience coordinating across countries (e.g., Germany + Spain).
- Basic familiarity with payroll concepts (even if not executing payroll).
What we offer
- High-ownership role with clear growth as the company scales.
- Direct collaboration with COO and CFO; fast decision-making.
- Onsite team environment in Munich with an international team of smart and passionate individuals.
How to apply
Send your CV and earliest start date to [email protected]
Compensation depends on working hours and experience.
Bewerbungsfrage(n):
- Do you have experience in Germany-based HR administration?
Do you live in or near Munich?
Arbeitsort: Vor Ort
