Senior Media Buyer

Madrid, Madrid, Spain
Full Time
Senior Manager/Supervisor

Happy Mammoth is a fast-scaling natural food tech company with a strong presence in the United States, Australia, and Europe. We formulate, manufacture, and scale premium gut health foods and microbiome-focused supplements, operating at the intersection of science, performance marketing, and brand.

We are looking for an exceptional Senior Media Buyer to take ownership of paid acquisition and play a key role in scaling revenue efficiently across markets.

This role is not for a junior executor. We are looking for someone who has already managed meaningful spend, understands direct-response eCommerce deeply, and knows how to scale without destroying efficiency.


What You’ll Get

  • Strong compensation aligned with seniority and impact

  • Fully remote, full-time contractor role

  • Autonomy and ownership 

  • Direct access to decision-makers and a fast execution environment

  • Long-term growth opportunity within a scaling global brand


Important Role Notes

  • Full-time, fully remote contractor position

  • Strong B2C / direct-to-consumer background required


What We’re Looking For

Core Requirements

  • Proven experience managing $600K+/month ad spend 

  • Strong background in eCommerce performance marketing

  • Demonstrated ability to scale while maintaining ROAS and CPA discipline

  • Deep understanding of Meta ads at scale

  • Experience running campaigns across US, Australia, and EU markets

  • Ability to independently plan, test, scale, and optimize campaigns

  • Strong analytical skills with a performance-first mindset

Strategy & Execution

  • Excellent at writing clear, actionable creative briefs for designers and video editors

  • Strong understanding of full-funnel acquisition, including:

    • Prospecting

    • Retargeting

    • Upsells and post-purchase flows

  • Comfortable testing offers, angles, hooks, formats, and audiences

  • Experience collaborating with creative, CRO, and product teams

Nice to Have

  • Experience in health, supplements, or regulated products


Responsibilities

  • Own and scale high-budget paid media campaigns across Meta and other platforms

  • Drive profitable growth with a strong focus on ROAS, CPA, and LTV

  • Develop and manage structured testing roadmaps

  • Build and refine full-funnel acquisition strategies

  • Adapt messaging and targeting by market (US, AU, EU)

  • Analyze performance data, extract insights, and iterate fast

  • Stay ahead of platform changes, algorithm shifts, and competitive landscape


Application Notes

  • CV must be in English

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