Senior Client Success Manager (Hybrid)
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
PostedOct 7, 2026 · 1d ago
Role brief
growthroles summary, based on the employer's posting.
What you'll do
- Act as the daily client contact, building durable partnerships across your European portfolio
- Watch user acquisition campaign results and tune performance toward each client’s KPIs
- Spot portfolio expansion opportunities and carry out plans that support business goals
- Turn complex analysis into clear guidance, run client reviews, and show customers useful product features
- Represent the mobile advertising solution in external conversations with clients and partners
What you bring
- At least three years running programmatic mobile user acquisition campaigns tied to performance
- You communicate fluently in written and spoken English and can build strong client relationships
- You understand cohort analysis, acquisition measures such as ROAS and CPI, and the mobile app landscape
Who this fits
This senior client-facing role suits someone who pairs campaign analysis with proactive portfolio development. You’ll work in London from the office three days each week and remotely for two. Applicants need UK work authorization; the employer does not sponsor visas. Travel to the Barcelona headquarters is an opportunity offered for collaboration and team-building.
From the employer
Smadex is a performance advertising engine for mobile apps, enabling the world's leading marketers to grow across Mobile and Connected TV (CTV). Powered by AI models trained on real campaign outcomes, Smadex delivers profitable growth at scale. Headquartered in Barcelona, with teams across the Americas, EMEA, and APAC, Smadex is a business unit of Entravision (NYSE: EVC) and one of the fastest-growing DSPs.
To help us maintain our strong position in the industry, we are looking for a Senior Client Success Manager to manage and develop a portfolio of clients across Europe.
Location: London (Hybrid - 3 days office / 2 days remote)
Your Mission
As a Senior Client Success Manager, you will be the first point of contact for your clients, with a primary focus on growing and strengthening these partnerships on a daily basis.
This includes monitoring the performance of our user acquisition campaigns, optimizing campaigns against clients' KPIs, and consistently striving to exceed them. You will also be responsible for identifying and driving key business development initiatives to grow your portfolio.
The ideal candidate is a strong team player with excellent analytical skills, a proactive mindset, and a strong problem-solving attitude.
Tasks & Responsibilities
Skills & Requirements
What We Offer
Please note that we do not provide visa sponsorship. Candidates must have the legal right to work in the UK to be considered for this position.
To help us maintain our strong position in the industry, we are looking for a Senior Client Success Manager to manage and develop a portfolio of clients across Europe.
Location: London (Hybrid - 3 days office / 2 days remote)
Your Mission
As a Senior Client Success Manager, you will be the first point of contact for your clients, with a primary focus on growing and strengthening these partnerships on a daily basis.
This includes monitoring the performance of our user acquisition campaigns, optimizing campaigns against clients' KPIs, and consistently striving to exceed them. You will also be responsible for identifying and driving key business development initiatives to grow your portfolio.
The ideal candidate is a strong team player with excellent analytical skills, a proactive mindset, and a strong problem-solving attitude.
Tasks & Responsibilities
- Build and manage strategic partnerships within your portfolio.
- Identify growth opportunities and execute strategies to achieve business goals.
- Enable decision-making through data-driven strategies and actionable insights.
- Translate complex data analysis into clear and simple language for effective communication.
- Introduce and promote new product features aligned with customers' business needs and stage of growth.
- Lead client meetings and regular business reviews.
- Represent Entravision and Smadex externally and promote our in-house mobile advertising solution.
Skills & Requirements
- 3+ years of experience in mobile advertising, managing performance-based user acquisition campaigns through programmatic channels is required.
- Excellent written and verbal communication skills in English, with the ability to build and maintain strong relationships with clients.
- Strong analytical skills, with a deep understanding of cohort analysis and customer acquisition metrics (ROAS, CPM, IPM, CPI, and CPA).
- Strong understanding of the mobile app industry, including key players, media buying, sellers, suppliers, and MMPs.
- Proactive, disciplined, and highly organized, with the ability to manage and prioritize multiple tasks simultaneously.
- Positive attitude, passion for apps, and a strong problem-solving mindset.
What We Offer
- Competitive remuneration package
- Private health insurance
- Hybrid working model (3 days per week in our London co-working space, 2 days from home)
- Opportunity to travel to our Barcelona HQ for collaboration and team-building activities
- Continuous learning and training opportunities to support your career growth
- High visibility working with leading global app publishers and media partners
Please note that we do not provide visa sponsorship. Candidates must have the legal right to work in the UK to be considered for this position.
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