Senior Media Buyer (Meta + TikTok) - Agency

Media Stack is a network of ecommerce specialists with 50+ years of combined experience across paid media, creative strategy, and CRO. We work with ambitious consumer brands across fashion, beauty, and wellness, and we're building a team of people who take genuine ownership over their work and care about the results as much as our clients do.The Role We're looking for a Senior Media Buyer to take the lead across a number of paid social accounts at Media Stack. This is a full-time, remote role for someone who is as comfortable in the data as they are in a client call — and is able to lead and craft the creative strategy.You'll be managing and scaling campaigns across Meta and Tik Tok for a portfolio of ecommerce clients, working closely with our in-house Creative Strategist, and helping shape how the paid media function operates at the agency. This is a leadership role as much as an execution role.What You'll Be DoingPlanning, executing, and optimising paid social campaigns across Meta, Tik Tok, and other paid social channelsCollaborating closely with our in-house Creative Strategist — you'll be the key performance input, feeding data-driven insights into the creative process to inform what gets made and tested nextLeading on creative strategy from a performance perspective — analysing what's working, identifying winning angles, and briefing creative on hooks, formats, and messagingOwning client relationships directly — communicating performance clearly, proactively flagging issues, and building trustForecasting, budget pacing, and reallocation across accounts to maximise performanceSetting up and interpreting A/B tests across creatives, audiences, and bidding strategiesApplying attribution modelling knowledge to reporting and client-facing analysisContributing to how the paid media department is built and runWhat We're Looking For7+ years managing paid social campaigns, primarily Meta and Tik TokProven track record with ecommerce consumer brands — fashion, beauty, and/or wellnessStrong analytical ability — attribution modelling, ROAS, CAC, funnel dynamicsA genuine creative strategist — you understand why an ad works, not just whether it doesDirect client-facing experience — you're transparent, articulate, and proactiveSomeone entrepreneurial — if you've run your own venture at some point, even betterAdvanced in Excel or Google Sheets for reporting and analysisFamiliarity with Motion (creative strategy tool) — not a hard requirement, but a strong preferenceComfortable working independently in a remote environmentAgency experience is a strong plus; brand-side experience also valuedSomeone that is always looking to improve process efficiencies.AI native to support with work.You’ll Thrive Here If YouWant to own a channel, not just execute on itHave strong opinions about creative and can back them up with dataAre energised by fast-moving ecommerce environmentsTreat clients like partners, not accountsAre naturally entrepreneurial and take initiative without being askedInterview ProcessYou'll be asked to complete a full account audit of one of our client accounts as part of the process.#J-18808-Ljbffr