Senior SEM & Performance Marketing Specialist

Senior SEM & Performance Marketing Specialist

Role Overview: We are seeking a highly technical and data-driven Senior SEM Specialist with 5+ years of experience to manage and optimize our global multi-channel search and app performance ecosystem. This role requires a master of "Search Beyond Google," with deep expertise in Search Ads 360 (SA360) for cross-engine management and specialized knowledge of international platforms like Naver, Bing, and Apple Search Ads.

You will be responsible for the full lifecycle of performance campaigns—from advanced technical setup and automated rule creation to finding hidden anomalies in high-volume global data.

Key Responsibilities

• End-to-end execution on Google Ads, Bing (Microsoft Advertising), and specialized international engines like Naver (Power Link, Brand Search).
• Use Search Ads 360 (SA360) to manage cross-engine bid strategies, utilizing Floodlight tags for unified conversion attribution and intraday bidding.
• Lead App Install and Engagement campaigns across Google App Campaigns (formerly UAC) and Apple Search Ads (ASA), focusing on TTR (Tap-Through Rate) and post-install conversion events.
• Design and deploy complex automated rules to manage budget pacing, pause low-performing assets, and adjust bids based on real-time performance signals.
• Develop and maintain Google Ads Scripts for advanced tasks (e.g., negative keyword expansion, anomaly detection alerts, and external data integration).
• Navigate the shift from manual to AI-driven bidding, effectively managing tROAS, tCPA, and Maximize Conversion Value while maintaining guardrails to prevent budget waste.
• Own the technical implementation of GTM (Google Tag Manager), Server-Side Tracking, and Apple’s AdAttributionKit to ensure data integrity in a privacy-first (cookieless) environment.
• Proactively identify "campaign anomalies"—such as sudden spikes in CPA, tracking drops, or keyword cannibalization—using both manual audits and automated monitoring tools.
• Build multi-dimensional dashboards that reconcile data across web and mobile app environments, providing a clear "path to purchase" view.
• Move beyond basic demographics to leverage first-party data, in-market segments, and life events for hyper-relevant targeting.
• Lead A/B testing for ad copy and visual assets across Video (YouTube/Discovery) and Display networks, utilizing responsive formats to maximize Quality Score and Ad Strength.

Qualifications

• 5+ years of hands-on experience in SEM and Performance Marketing.
• Mastery of Google Ads, SA360, and Microsoft Advertising.
• Proven experience with Naver Ads (essential for APAC markets) and Apple Search Ads.
• Proficiency in JavaScript (for Google Ads Scripts) and SQL/BigQuery is a major plus.
• Expert-level Google Tag Manager and GA4 implementation skills.
• Ability to translate "messy" multi-country data into clear, actionable growth strategies.
• Experience managing campaigns across different time zones, currencies, and languages.