Senior Paid Advertising Specialist

About Us Mongoose Social is a leading DTC performance marketing agency, managing £75M+ in ad spend across 250+ ecommerce brands. We partner with mid-market to enterprise brands to drive profitable growth through paid social, creative strategy, and retention. We move fast, obsess over results, and give our people real ownership and rapid progression. This is an A-player culture where high performers accelerate quickly. The Role We're looking for a Senior Paid Advertising Specialist to take full end-to-end ownership of a portfolio of mid-market to enterprise ecommerce accounts. This is a paid social-first role - primarily Meta, then TikTok and Pinterest where you'll own strategy, execution, and client relationships. On smaller accounts, there is also Google ads management - full training provided. You'll think beyond in-platform metrics, using tools like Triple Whale and GA4 to analyse the full ecommerce picture and build growth strategies that move the numbers that actually matter: MER, efficiency ratio, and profitability. What You'll Own End-to-end account management: strategy, execution, optimisation, and client relationships across a portfolio of mid-to-enterprise brands. Building and scaling paid social and search campaigns - primarily Meta, then TikTok and Pinterest - to drive profitable, sustainable growth. Analysing performance holistically across Triple Whale and GA4, going beyond platform ROAS to blended MER, efficiency ratio, and EBITDA-level profitability. Developing and executing growth strategies tailored to each brand's margins, goals, and stage. Leading client meetings and QBRs - communicating strategy, performance, and next steps with confidence and clarity. Partnering with the creative team to brief, request, and coordinate the assets that fuel campaign performance. Owning your accounts' commercial outcomes and being accountable for retention and growth. What You'll Bring Proven experience managing Meta ads for ecommerce brands at meaningful scale (£20,000+/month, ideally into six figures monthly spend). Strong command of broader ecommerce analytics - Triple Whale, GA4 - and the ability to make decisions based on MER, efficiency ratio, NCPA and profitability, not just in-platform metrics. Experience across mid-market to enterprise DTC brands. TikTok and Pinterest advertising experience; light Google Ads experience is advantageous but paid social is the primary focus. A genuine understanding of what drives profitable ecommerce growth, beyond just running ads. Confident, client-facing communication and the ability to lead relationships independently. Strong organisation, attention to detail, and the drive to thrive in a fast-paced, high-growth environment. Why Mongoose Social

• Fast progression and real growth opportunities - we promote from within and reward performance.
• Work with premium mid-market and enterprise brands on genuinely challenging accounts.
• Regular events with our platform partners - Meta, Google, Triple Whale, and Attentive.
• Team trips, dinners, and travel abroad throughout the year.
• An A-player culture where ambitious, high-performing people accelerate quickly.