Senior Customer Success Manager B2B - Adtech

We are looking for a Senior Customer Success Manager to manage a portfolio of strategic B2B customers and own the customer relationship from onboarding through retention and growth.

This is a commercial, customer-facing role for someone who enjoys building long-term relationships, understanding customers' business needs, and turning those relationships into measurable business results.

You will act as a trusted partner to senior stakeholders, helping customers achieve their goals while driving retention, renewals, upsell, and cross-sell opportunities.

Key Responsibilities

• Manage a portfolio of strategic B2B customers throughout the full customer lifecycle.
• Build and maintain strong relationships with key decision-makers and senior stakeholders.
• Understand customer goals, challenges, and business priorities and translate them into actionable plans.
• Lead onboarding, ongoing account management, renewals, and account expansion.
• Identify upsell and cross-sell opportunities and manage commercial discussions.
• Develop account plans and customer success strategies aligned with business objectives.
• Monitor customer health, engagement, and satisfaction, proactively addressing potential risks.
• Analyze performance data to identify opportunities for improvement and growth.
• Prepare and present business reviews, performance updates, and strategic recommendations.
• Collaborate with Sales, Product, Operations, and other internal teams to resolve customer challenges.
• Represent customer needs internally and contribute to improving products, processes, and customer experience.
• Maintain accurate renewal forecasts and identify potential expansion opportunities.
• Take ownership of customer outcomes and continuously work to increase account value.

Requirements

• 5+ years of experience in Customer Success, Account Management, or a similar B2B customer-facing role.
• Proven experience managing strategic or enterprise accounts.
• Experience working with international or global customers.
• Strong commercial experience in renewals, upselling, and cross-selling.
• Experience working directly with senior stakeholders and decision-makers.
• Excellent negotiation, presentation, and communication skills.
• Strong analytical skills and the ability to translate data into actionable business insights.
• Excellent relationship-building and interpersonal skills.
• Highly organized, proactive, and able to work independently.
• Strong business orientation and a high level of ownership.
• Native-level English, both written and spoken.

Advantages

• Experience in AdTech, MarTech, Mobile, SaaS, or Digital Marketing.
• Familiarity with performance marketing, paid User Acquisition (UA), SEO, ASO, or related digital marketing ecosystems.
• Experience working with global technology companies.
• Experience managing complex, high-value customer portfolios.

Who We're Looking For

A commercially minded Customer Success professional who goes beyond traditional account management.

Someone who knows how to build trust with senior stakeholders, understand business challenges, identify growth opportunities, and take ownership from problem to solution.

You should be equally comfortable discussing strategy, performance, commercial opportunities, and day-to-day customer needs.