Office Assistant

Location: Warsaw We Are: RTB House is a next-generation performance demand-side platform (DSP) that uses proprietary Deep Learning AI algorithms to help brands grow. The company is the market leader in driving performance using Deep Learning across the entire purchase funnel. Founded in 2012 and now operating in 90+ markets, RTB House has always been private-by-design. It embraces first-party advertising and a relentless approach to innovation. RTB House offers end-to-end Deep Learning-powered AdTech products and solutions to maximize conversion, drive new customer acquisition, create engagement, and fuel long-term demand for a global base of clients. In 2026, RTB House launched rtb.com, a self-service platform specifically designed to allow small and medium-sized businesses and agencies to deploy auto-built creatives and maximize performance on any budget. You Will: Provide ongoing assistance to associates in the field of administration; Organize office supplies, groceries, and other necessary orders; Take care for the office on a daily basis; Oversee the company’s fixed assets; Report technical office issues to the technical service; Prepare office spaces for associates in the office and coordinating associates' access to the office; Assist associates during meetings (welcoming and setting up all necessary orders and equipment for the meetings); Manage the company’s email inbox and HQ documentation workflow, both internally and externally; Collaborate with vendors; Coordinate office and administrative invoices; Update internal administrative documents; Organize business trips; Perform tasks requested by the Direct Manager and cooperate with other departments. Desired Experience: 1 year of professional experience; Professional administrative experience preferred; Great communication skills, customer focus and strong problem solving skills; Attention to detail and accuracy; Positive attitude, openness to challenges, ability to work independently and with the team members; Strong motivation focused on service delivery in the administrative department; Polish - advanced level; English - intermediate level; Proficiency in Microsoft Office and G-Suite. We Offer: A chance to cooperate in a truly international environment with the best people; An office located next to the metro station; Possibility to learn in an international organisation in one of the fastest growing online advertising sectors; Friendly atmosphere while cooperation with a dynamic team of open minded professionals and passion for internet technology and advertising solutions. Apply now! You don't need to tick every box to apply. If you are passionate about digital marketing, send us your CV, and we'll review it.