growthroles

Senior Client Success Manager

Smadex SLU smadex.com Open · verified Sep 29, 2026
London Full-time Senior Customer Success

At a glance

Senior Customer Success role at Smadex SLU. London · full-time.

Pay not stated

RoleCustomer Success
SenioritySenior
LocationLondon
EmploymentFull-time
PostedJul 2, 2026 · 2mo ago
Role brief

growthroles summary, based on the employer's posting.

What you'll do

  • Manage European client partnerships as their primary contact and grow each relationship over time
  • Track user acquisition campaign results, then optimize delivery against client KPIs
  • Find and execute portfolio growth opportunities tied to business goals
  • Turn cohort and acquisition analysis into clear recommendations and client communications
  • Lead business reviews, present product features, and sell Smadex’s mobile advertising solution

What you bring

  • At least three years managing programmatic, performance-based mobile user acquisition campaigns
  • Strong spoken and written English for developing durable client relationships
  • Hands-on knowledge of cohort analysis and metrics such as ROAS, CPM, IPM, CPI, and CPA
  • A solid grasp of mobile app participants, media buying, sellers, suppliers, and MMPs

Who this fits

You’ll suit a senior, analytical client-facing role that combines campaign optimization, business development, presentations, and problem solving. The position is hybrid in London, with three coworking days and two home-working days each week. Travel to the Barcelona headquarters may be possible, and you must already have legal permission to work because visa sponsorship is unavailable.

From the employer

Smadex is a leading advertising technology company founded in Barcelona in 2010 and sold to American-based and stock-listed Entravision in 2018 (NYSE::EVC). We power campaigns for Apps, Games and Brands across Mobile and CTV using advanced machine learning and optimized creative strategies to deliver results. Smadex is one of the fastest growing DSPs and we are adding talent to fuel our ambitious plans.

To help us maintain our strong position in the industry, we are looking for an Senior Client Success Manager to manage and develop a portfolio of clients across Europe.

This position is a hybrid role based in London
Your mission:

The final candidate will be the first point of contact for all your clients and your main focus will be to grow the partnerships together daily. This includes monitoring the performance of our user acquisition campaigns, optimising towards clients' KPIs and overachieving them. You will be responsible for finding key business development initiatives to grow your portfolio. The right candidate will be keen to work in a team, will be analytically strong, and have a problem-solving attitude.

Your tasks and responsibilities:

  • Build and manage strategic partnerships within your portfolio
  • Identify growth opportunities and execute them to achieve goals
  • Enable decision-making with a data-driven strategy and valuable insights
  • Translate complex data analysis into simple language for clear communications
  • Offer new product features aligned with customers’ business stage
  • Lead client meetings and regular business reviews
  • Represent Entravision & Smadex externally and sell our in-house mobile advertising solution.

Skills and requirements:

  • 3+ years of mobile experience managing mobile performance-based user acquisition campaigns on programmatic is a must
  • Excellent communication skills (verbal and written) to develop strong relationships with your clients in English is a must
  • Analytical, with a deep understanding of cohort analysis and customer acquisition metrics including ROAS, CPM, IPM, CPI, CPA.
  • Strong understanding of the mobile app industry: actors, media-buying, sellers, suppliers, MMP’s.
  • Proactive, disciplined, and highly organized with the ability to manage and prioritize multiple tasks simultaneously in a timely manner.
  • Positive attitude, passion for Apps, and a love for problem-solving.

What’s in it for you?

  • Competitive remuneration
  • Health insurance
  • Be part of a leading, fast-growing, innovative company shaping the future of mobile advertising.
  • Integrate a highly motivated and young team.
  • Possibility of traveling to the Barcelona HQ for collaboration and team-building activities.
  • Hybrid model. Work from our co-working 3 days per week and 2 from home.
  • Exposure to leading global app publishers and media partners in the digital advertising industry.
  • Learning and training opportunities to grow your career.

Please note that we do not provide visa sponsorship. Candidates without a legal permit to work won't be considered.

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