Client Success Trainee

Client Success Trainee We’re looking for a Client Success Trainee to join our team in Madrid and play a key role in shaping the future of neuro-contextual advertising at a global scale. Who We Are Seedtag is the leading Neuro-Contextual Advertising Company. We are redefining how advertising works in a privacy-first world by moving beyond keywords and cookies, towards understanding human emotion, intent, and context. Powered by advanced AI and neuroscience, our proprietary technology, Liz, delivers a deep, human-like understanding of content and attention. This enables brands to connect with audiences at the right moment, in the right mindset, with ads that are relevant, engaging, and respectful of the user experience. Founded in 2014 by two ex-Googlers, Seedtag has grown into a global company with 700+ Seedtaggers across 17 countries, backed by €250M in funding, and expanding rapidly across the open web and Connected TV. We’re not just building technology, we’re rewriting the rules of advertising. Your Challenge As Client Success Trainee, you will: Support the day-to-day management of digital advertising campaigns to ensure smooth execution Collect and organise performance data to assist in the preparation of client reports Participate in internal and client meetings to better understand objectives and needs Collaborate with Sales and Operations teams to support campaign delivery and optimisation What You’ll Need to Succeed Advanced proficiency in Excel or Google Sheets and data analysis tools Good level of English (minimum B2) International and multicultural mindset, with an interest in working with global teams Proactive attitude, willingness to learn, and ability to suggest improvements and new ideas Why Join Seedtag? This is a defining moment to join Seedtag, a company that combines scale, ambition, and soul. Growth & Opportunity: Accelerated, hands-on development with real ownership, global projects, and internal mobility. Flexibility: We trust you to balance work and life with flexible schedules and a hybrid model; work from home, the office, or wherever you do your best work. Learning & Development: Access to our online platform for learning, continuous training, and optional English or Spanish group classes. Culture that Cares: Well-being is part of how we work, supported by initiatives like SeedDay, Digital Disconnection, and team-building moments. Connection & Fun: Global events, offsites, celebrations, and a strong sense of belonging across all Seedtag locations. Additional Perks Gympass access to wellness and fitness programs Seedsave Program with exclusive discounts Ready to Join the Seedtag Universe? If you’re looking for a place where technology has soul, where ideas turn into impact, and where people truly come first, welcome to Seedtag. At Seedtag, we foster an inclusive environment where everyone can thrive. We welcome diverse perspectives, as they fuel our innovation and growth. If you require any accommodations during the hiring process, please let us know. We’re committed to ensuring a positive and accessible experience. Send us your CV and let’s build the future of advertising together. #MakeItHappen #OneTeamOneDream #ILoveSeedtag #DreamBig Department Sales Locations Madrid Remote status Hybrid About Seedtag Founded in 2014 Coworkers 700