Senior Media Buyer (Remote — Brazil) **Company:** Split Rocket **Location:** Brazil — Fully Remote **Working Hours:** US Eastern Time **Employment Type:** Full\-time **Annual Compensation:** Approximately BRL R$249,000–R$383,000, depending on experience and qualifications **Language Requirement:** Advanced English (C1 or C2 level, or equivalent) — mandatory About Split Rocket Split Rocket is a full\-service e\-commerce marketing agency helping brands scale from $5–10 million to $20 million\+ in annual revenue. We manage paid media across Meta, Google, and TikTok for multiple e\-commerce brands, and we're expanding our media team. About the Role We're hiring a **Senior Media Buyer** who thinks like a growth operator, not just a platform specialist. You'll own the strategy, execution, and profitability of a portfolio of e\-commerce accounts. This includes forecasting advertising spend, revenue, and contribution margin, managing combined monthly budgets exceeding USD $200,000, and maintaining reliable performance measurement. You'll lead client conversations around growth strategy, identify testing and expansion opportunities, and take ownership of results across the accounts you manage. You'll report to our Chief Execution Officer, who will partner with you on strategic planning and direction. You'll also mentor one or two junior media buyers. This is a full\-time, remote position open to candidates based in Brazil who can consistently work US Eastern business hours. **Advanced English proficiency is mandatory.** All client meetings, internal communication, performance reporting, and strategic presentations are conducted in English. Candidates must have professional fluency in both spoken and written English, equivalent to C1 or C2 level. Our Approach: Profitable Growth, Not Just ROAS Our clients are typically e\-commerce brands generating $5–20 million in annual revenue. At this stage, in\-platform ROAS can look healthy even when the underlying business isn't generating sufficient profit. Your responsibility is to help clients grow profitably by: * Managing performance against business metrics, including MER, new\-customer CAC, contribution margin after ad spend, and cash payback period, rather than relying exclusively on platform ROAS. * Understanding each client's unit economics, including COGS, AOV, LTV, discounting, and return rates. * Establishing advertising spend limits based on profitability and cash\-flow constraints. * Forecasting revenue and contribution margin to support data\-driven budget recommendations. * Identifying when advertising channels may be taking credit for conversions that would have occurred organically, and using incrementality testing to evaluate impact. * Advising clients when to scale, maintain, or reduce advertising investment based on business performance. Key Responsibilities **Media Buying \& Performance Management** * Build monthly advertising spend and revenue forecasts for each account using historical performance and client goals. * Plan, launch, manage, and optimize campaigns across Meta, Google Ads (Search, Shopping, Performance Max, YouTube), and TikTok. * Manage daily budget pacing and performance against KPIs, including ROAS, CPA, CPL, and MER. * Develop and refine full\-funnel campaign strategies, including audiences, bidding, budgets, placements, and creative rotation. * Identify opportunities to expand channel coverage and increase budgets profitably. **Testing \& Optimization** * Develop and execute structured testing calendars covering creative, offers, landing pages, audiences, and bidding strategies. * Analyze historical campaign performance to identify insights and testing opportunities. * Translate performance data into actionable creative briefs for the creative team. * Evaluate campaign effectiveness through A/B testing, lift studies, and incrementality testing. **Client Communication \& Strategy** * Provide concise daily performance updates to clients. * Lead weekly client strategy calls conducted in English to review forecasts, results, priorities, and next steps. * Own monthly performance reporting and communicate strategic recommendations to clients and internal leadership. * Proactively identify performance risks and opportunities before they become major issues. **Measurement \& Reporting** * Maintain accurate tracking and attribution through GA4, pixels, conversion APIs, server\-side tracking, and UTMs. * Validate advertising performance against Shopify revenue and order data. * Build and maintain reports and dashboards that support forecasting and business decisions. **Team Leadership** * Mentor junior media buyers and support their professional development. * Share learnings, processes, and best practices with the broader team. * Contribute to improving internal media buying playbooks and workflows. Required Qualifications * 4\+ years of hands\-on media buying experience, primarily in paid social or paid search. * Experience personally managing