E-Commerce Marketing Junior Assistant

October 8, 2026

Remote

Junior

Madrid

May rule you out

Another language required
Spanish

Worth knowing

English is required

Description

Junior e-commerce marketing role covering the full cycle of paid digital promotion: budget planning, traffic strategy, campaign QA, reconciliation and performance analytics. The hire manages SEM, CPS/affiliate, paid social and media buying campaigns aligned with product launches and major sales events. The role works across MKT, Product, Operations, PR and external agency partners.

Responsibilities

Plan, forecast, and manage quarterly and annual e-commerce paid marketing budgets across SEM, CPS and media buying
Formulate budget allocation plans for SEM campaigns based on product launches, campaign objectives and business targets, handling approvals
Manage CPS commission budgets, paid media procurement fees, and promotional resource expenditures
Align marketing resource planning with product launches and major shopping events such as Black Friday and Summer Sales
Dynamically adjust budget distribution and media resource allocations based on real-time business performance and campaign ROI
Develop traffic generation plans in line with the annual marketing calendar, major sales events and product launches, collaborating with MKT, Product and Operations teams
Conduct media market research to evaluate trends, consumer behaviors and publisher performance to inform channel selection and allocation strategy
Optimize CPS affiliate commission tiers, negotiate partner placements, and execute resource barters to boost partner efficiency
Design custom traffic acquisition and conversion strategies tailored to specific campaign goals across different product categories
Oversee day-to-day management of SEM Search and Shopping campaigns, including keyword research, ad copy, sitelinks, bidding strategies and promo integrations
Produce creative briefs for search ads including copy, keywords and sitelinks aligned with Global HQ account structure
Draft creative briefs for CPS media networks, overseeing creative production and launch workflows
Create, track, and distribute promotional discount codes and coupons to agencies, media outlets and channel partners
Ensure accurate product specifications, promotional mechanisms and marketing assets are distributed to agencies, media partners and publishers
Develop briefs for Demand Gen ad creatives, copy and promotional materials for launch events and major sales
Coordinate on-site content planning and messaging execution for owned push notifications
Perform routine maintenance, audits and error checks for SEO product feeds
Partner with PR, Social and Brand MKT teams to ensure unified promotional and product messaging across all touchpoints
Conduct pre- and post-launch QA checks on SEM, Shopping and Search campaigns to ensure accuracy of product information, pricing and landing pages
Verify ad creatives and promo details for Demand Gen campaigns during key sales periods
Inspect media buying ad placements to ensure ads run according to agreed schedules, placements and specs
Audit promo codes and coupon functionality live on-site and resolve any technical errors immediately
Identify and troubleshoot discrepancies across ads, creatives, pricing, landing pages and stock availability
Manage monthly CPS affiliate commission reviews and campaign data verification, validating commission rates and order statuses
Lead proof-of-performance acceptance for media buying campaigns, collecting screenshots, delivery proofs, business data and campaign reports
Maintain clear communication with media partners, agencies, internal finance and business operations to facilitate campaign execution and invoice settlements
Audit order anomalies, commission disputes and tracking discrepancies to drive swift resolutions
Monitor and analyze daily/weekly SEM performance metrics such as Cost, CTR, Conversion Rate, ROAS and CPA to evaluate channel effectiveness
Track affiliate platform dashboards to analyze orders, commission payouts and conversion trends
Conduct post-campaign reviews to evaluate conversion funnels and identify traffic leakage or growth opportunities
Leverage store traffic and consumer data to build target persona profiles and understand user intent
Optimize audience targeting, media mix and budget distribution based on real-time channel performance and campaign objectives
Build performance media plans based on campaign KPIs, selecting appropriate media channels, targeting parameters and budget distributions
Select optimal ad formats and ad creatives tailored to specific media platform mechanics such as Meta, TikTok and Paid Search
Write creative briefs for ad copy and design assets, collaborating with internal design and agency teams to produce performance assets
Continuously track performance metrics such as Cost, CTR, Conversion and ROAS to dynamically optimize audience segments, placements and ad creatives

Requirements

Experience in E-Commerce Digital Marketing, Performance Marketing, or Paid Media Management targeting the Spanish market
Proven track record in managing SEM (Google Ads, Shopping), CPS/Affiliate Networks, and Performance Media/Paid Social
Strong data analysis capabilities using Google Analytics, Excel (Pivot Tables, VLOOKUP), and attribution tools
Deeply familiar with key performance metrics such as Cost, CTR, CVR, ROAS, CPA
Prior experience briefing agencies, managing external media vendor relationships, and handling financial reconciliations
Professional working proficiency or fluency in Spanish and English, written and spoken; prefer Chinese speaker
Highly organized with exceptional attention to detail, strong cross-functional communication skills, and an agile problem-solving mindset

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