Full responsibility for payroll coordination in Germany and internationally (collaboration with external payroll providers; review and approval of payroll runs)., Development, maintenance, and communication of Compensation & Benefits programs (including company pension schemes, mobility benefits, international perks)., Advising and supporting international employees on matters of German labor, tax, and social security law (e.g., onboarding, contract-related questions)., Correspondence with public authorities (e.g., social insurance agencies, tax offices, immigration authorities) and communication with external service providers., Creation, maintenance, and standardization of HR documents and guidelines (e.g., onboarding checklists, process SOPs)., Lead administration of the HR Knowledge Management Platform (Jira) — structure, templates, access control, documentation quality, and reporting., Participation in (digital) HR projects and continuous improvement initiatives., Ensuring compliance and process reliability across all administrative HR operations., Preparation of reports, analyses, and KPIs for management and finance.