We are incorporating a **Billing Administrator** to support billing-related tasks You will work from home, and on office presence days, in Bilbao (Arenal 5\), where you will primarily carry out the following responsibilities: * Check data for invoicing (purchase order expenses, etc.) * Follow-up and management of collections and phone-based collection claims. * Resolution of incidents related to collections management. * English language skills are highly valued (minimum B1 level, certifiable) **We offer:** * Temporary contract covering maternity leave * Working hours: Monday to Thursday from 08:00 to 16:15 (flexible) / Friday 8:00-14:00 h * Hybrid work arrangement (office/remote) Proficiency in Microsoft Office English B1