Customer Success Manager

**Job Description:** As a Customer Success Manager (CSM) at IAS, you are a relationship manager, an ad-tech consultant, a cross-functional orchestrator, and a strategic problem solver. You will independently own a high-value, fast-moving book of direct advertiser and agency clients across CEE (with a strong focus on the DACH region). In the digital ad-verification space, technology changes daily and internal processes are constantly evolving. We are looking for an adaptable, resilient professional who thrives in complexity, remains calm under high-stakes client pressure, and loves the challenge of building structure out of ambiguity. If you require highly rigid, pre-packaged processes to get things done, this is not the environment for you. If you are energized by cross-functional firefighting, technical deep-dives, and driving commercial growth, you will thrive here. Furthermore, as the advertising and tech landscape enters the era of AI, we are actively looking for a tech-forward strategic thinker who understands how to seamlessly integrate AI tools into their daily operational workflows. You should possess a genuine curiosity about how AI and Agentic technologies are transforming the digital advertising industry, and be excited about bringing those insights to our clients. If you require highly rigid, pre-packaged processes to get things done, this is not the environment for you. If you are energized by cross-functional firefighting, technical deep-dives, and leveraging the AI revolution to scale your impact, you will thrive here. **What You’ll Do:** * **Drive Commercial & Programmatic Retention:** You feel comfortable to secure renewals and unlock expansion, even without a sales partner on your side. You will proactively identify platform adoption gaps, optimize campaign delivery, and guide clients on maximizing their ROI. * **Command Client Rooms & High-Stakes Escalations:** Confidently own senior-level meetings, strategic performance reviews, and sensitive client escalations (e.g., tech discrepancy disputes). You must remain highly composed, analytical, and empathetic in situations with urgency. * **Master & Translate Complex Ad-Tech:** Develop a deep, hands-on technical understanding of the IAS product suite. You must be able to translate complex data, technical anomalies, and product mechanics into simple, actionable business value for clients. * **End-to-End Account Ownership:** Orchestrate the entire client lifecycle (onboarding, technical integration, campaign optimization, QBRs, and renewals) for around 30 strategic and highly demanding accounts. * **Lead Through Ambiguity & Gaps:** Act as an internal pioneer. When processes are uncompleted, siloed, or under review, you don't wait for a manual. You proactively coordinate with Product, Technical Client Operations, Sales Operations and Finance to build temporary workarounds and champion permanent solutions. **What You'll Need:** * **Languages:** **Professional fluency in both Ger