Administrative Assistant - Part-time

• 23 juin 2026 • 40 - 60% • Indefinite duration • french (Intermediate) • Routes des toches 3, 1026 Echandens • Log in to see the jobup.ch salary estimate Administrative Assistant - Part-time ### ? About PortMix SA : PortMix is a company created in 2017. Today, PortMix specializes in laying, installation, and interior renovation work. Operating throughout Romandie, the company is headquartered in Échandens and has a branch in Genève. Our field of expertise includes notably the installation of custom doors and cabinets for various projects such as commercial, residential, and professional developments. Thanks to our experience and know-how, we have established strong partnerships with important construction companies such as Losinger Marazzi, Steiner SA, Implenia, Edifea, HRS Real Estate SA, Induni, or Complex Bau. Your responsibilities: ### • Ensure the administrative follow-up of ongoing projects (warranty requests, invoicing, contracts, etc.) • Manage telephone calls and incoming mail. • Organize and file administrative documents. • Prepare invoices and follow up on payments. • Data entry and accounting follow-up (customer/supplier invoices, payments, reminders). • Preparation of payroll elements and follow-up of social security declarations. • Management and updating of contracts and administrative documents. Your profile: ### • Previous experience in an administrative or similar role. • Proficiency with IT tools (MS Office, particularly Excel and Word). • Excellent organizational skills and attention to detail. • Good command of French (oral and written). • Ability to work independently and in a team. What we offer: ### • A part-time position with flexible hours. • A dynamic and friendly working environment. • An opportunity to contribute to varied and stimulating projects. • A professional setting based in Échandens Information to apply: ### If you are motivated to join a growing company and contribute to its success, we would be delighted to receive your application.