Customer Success Manager in London

Starcount is fast‑building a reputation as one of the most exciting, innovative audience data products in the market. We are delivering significant performance uplifts for our partners. In an industry of commoditised data where everyone has access to the same signals, Starcount gives clients a unique advantage: the ‘Why’ intelligence layer. The ultimate competitive advantage isn't just knowing what someone bought; it’s knowing why they bought it. Starcount exists to reveal these hidden motivations by bringing together fragmented data across online web behaviours, banking spend transactions, and telco movement. We don't just find shoppers; we reveal their reasons for choosing every brand so our clients can deliver high‑performance outcomes across every channel. We are an independent challenger business, quickly scaling across media agencies, media owners, and brands directly. Our data is applied across omnichannel campaigns, including Out‑of‑Home (OOH), Connected TV (CTV), digital, paid social, mail, and CRM. We are a small but growing team based in Liverpool Street, London.

The Role

We are looking for a Customer Success Manager who enjoys making sense of data, understanding audience behaviours and helping clients make better decisions for their media campaigns. This role offers the opportunity to work with a talented team and manage a great mix of clients. It is a superb opportunity for someone ready to accelerate their career in an ambitious, fast‑growing data business. We are looking for someone committed to delivering excellent value and service to clients, who is excited by the power of data‑driven insight to make a tangible difference to campaigns.

Key Responsibilities

• Act as a primary day‑to‑day contact for clients, maintaining strong working relationships and keeping them updated on our data, platforms, and solution offerings.
• Coordinate and collate central account management documents, including Quarterly Business Reviews (QBRs), platform roadmap sessions, and renewal plans.
• Proactively track account health, usage metrics, and satisfaction to protect renewals and identify organic growth opportunities.
• Work closely with clients to interpret campaign briefs and utilise Starcount’s data to build custom, high‑performing audiences.
• Turn complex data and research findings into compelling stories, clear recommendations, and practical next steps for client strategy, planning, and activation.
• Manage day‑to‑day delivery across insight projects, overseeing brief alignment, timelines, outputs, and quality control.
• Become fluent in Starcount’s unique data taxonomy, confidently translating complex client briefs into high‑performing audience segments.
• Work closely with our internal data scientists, product and sales teams to effectively translate marketplace feedback and client needs to shape our product roadmap.
• Ensure campaign effectiveness is measured wherever possible, securing the data and performance metrics needed to build undeniable, ROI‑led case studies.

What You Need to Know

Required Skills & Experience

• Excellent written and verbal communication skills, with a proven ability to simplify complex data and present confidently to senior stakeholders.
• Proficiency in building compelling PowerPoint decks and narratives that move seamlessly from evidence to implication to action.
• Strong interpersonal skills with a track record of building trust and rapport with agency partners or brands.
• Prior experience translating campaign briefs into actionable audiences, media plans, and measurement strategies across various sectors.
• Strong numeracy and attention to detail, with the ability to turn raw data into commercially useful recommendations.
• Ability to challenge received wisdom and design creative solutions that balance budgets, objectives, and timeframes.
• A keen interest in culture, trends, and behavioural science to explain the ‘why’ behind consumer actions.

Nice‑to‑Have Skills

• Experience using data for audience targeting across the programmatic ecosystem (e.g., Circana, Experian, Mastercard, O2, etc.).
• Familiarity with industry insight tools such as TGI, IPA TouchPoints, YouGov Brand Index, social listening tools, or survey platforms.
• Experience using survey or alternative data to inform brand lift studies, campaign analysis, and effectiveness reporting.

Our Benefits

• Holiday: 25 days annual leave
• Work‑Life Balance: Early Friday finishes (4pm)
• Hybrid Working: 2 days in our London office, 3 days WFH
• Financial: Salary Sacrifice Pension scheme
• Equity: Employee Share Options scheme