E-Commerce Marketplace Manager – Amazon, Walmart

Workana

. Own and execute the end-to-end strategy, listing setup, and launch of ToolBox Widget’s catalog on Walmart Marketplace .

Posted 9/17/2026contractRemote • Argentina, Brazil, Mexico, Peru, Colombia, ChileMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in managing Amazon Seller Central and Walmart Marketplace operations, including P&L analysis, inventory forecasting, and PPC campaign optimization. Proven ability to transition marketplace management in-house while ensuring catalog integrity and compliance across multiple platforms.

Highest-signal resume keywords

Amazon Seller Central ManagementWalmart Marketplace OperationsPPC Campaign OptimizationP&L AnalysisInventory Forecasting

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Catalog ManagementListing CreationBrand RegistryContribution Margin AnalysisSOP Development3PL Fulfillment OperationsMarketplace Pricing StrategyAd Spend ManagementStock AllocationCase Troubleshooting

Soft Skills

Ownership MindsetCollaborationAutonomy

Tools & Technologies

Walmart ConnectShopify IntegrationAmazon FBAAmazon FBMEBayTarget Plus

Industry Keywords

E-commerceConsumer HardlinesAutomotive AccessoriesToolsHardware

About the role

Key responsibilities & impact

Own and execute the end-to-end strategy, listing setup, and launch of ToolBox Widget’s catalog on Walmart Marketplace
Transition Amazon Seller Central operations (FBA and FBM) in-house, establishing SOPs and eliminating agency reliance
Build and manage per-SKU contribution margin P&L models accounting for platform fees, ad spend, storage costs, and freight
Create, optimize, and manage Sponsored Products, Brands, Display, and Walmart Connect advertising campaigns
Ensure catalog integrity, rich media, A+ content, variations, and compliance across all active SKUs on all marketplaces
Manage inventory forecasting, reorder triggers, and stock allocation with 3PL partners and internal teams
Coordinate marketplace pricing with DTC and wholesale strategies to prevent MAP erosion and channel cannibalization
Troubleshoot seller account issues, including case creation, listing suppressions, Brand Registry, and reimbursement claims
Launch Walmart Marketplace within the first 120 days and transition Amazon management fully in-house
Work with executive leadership, internal content creators, and PPC specialists to drive marketplace profitability and optimize contribution margins

Requirements

What you’ll need

3+ years of hands-on experience as an Amazon Seller Central operator managing account health, listing creation, and Brand Registry
Demonstrated hands-on experience with Walmart Marketplace, including item setup, catalog health, WFS vs. seller-fulfilled setups, and Walmart Connect
Direct hands-on experience running and optimizing PPC campaigns on both Amazon Seller Central and Walmart Connect
Strong P&L literacy with the ability to analyze unit economics, contribution margins, and platform fee structures
Experience with e-commerce inventory forecasting, stock allocation, and 3PL fulfillment operations
High level of autonomy, ownership mindset, and experience collaborating with cross-functional creative and marketing teams
Fluent English is mandatory
Must be based in Latin America
Prior experience transitioning marketplace management from an external agency to an in-house operation
Familiarity with Shopify integration and multi-channel e-commerce architectures
Experience in tools, hardware, automotive accessory, or consumer hardlines categories
Hands-on experience selling on eBay, Target Plus, or international marketplaces (UK, AU, CA, EU)

Benefits

Comp & perks

Competitive compensation in USD
Fully remote work within Latin America with flexible time schedules
Career growth with international clients and dynamic projects
Long-term independent contractor agreement
No additional benefits such as paid time off, health insurance, etc.