Mariusz Jagielski
Amazon Ads and Marketplace Consultant
I have worked in e-commerce and online sales for 15 years. Since 2016, I have specialized in Amazon Seller Central and Amazon Vendor Central, Amazon Ads, catalogues and listings, A+ Content, analytics and profitability. My work combines advertising, catalogue, operational and analytical experience.
I cover everything that affects sales: listing optimization, marketplace ads campaign structure, SKU-level profitability analysis, BaseLinker integration, logistics and operational processes. In practice the problem rarely lies in the listing alone — it is usually a combination of factors.
I am not an agency. I work directly with owners and business leaders, review specific accounts, identify gaps and propose data-driven actions. My role is practical consulting and implementation support, delivered as written, asynchronous cooperation in English.
Poland
and EU markets — DE, FR, IT, ES, RO, HU and more
B2B
Manufacturers, brands, distributors
11+
Marketplace platforms in the service portfolio
360°
Strategy, ads, listings, analytics, logistics
Areas of specialization
Amazon Seller Central
3P strategy, account management, A+ Content, Brand Store, visibility optimization
Amazon Vendor Central
1P model, terms negotiation, deductions management, Vendor profitability analysis
European platforms
Allegro, Kaufland, eBay, Empik Marketplace — setup, optimization, scaling
Cross-border sales
EU market expansion, localization strategy, VAT, logistics, operational processes
My experience
First steps on marketplaces
Started selling on Allegro and eBay. Hands-on with the basics: listings, pricing, logistics. First experiments with Amazon Seller Central.
Deepening Amazon expertise
Working with Amazon Seller Central and Amazon Vendor Central. Learning the specifics of each model, Ads campaign structures, FBA management, A+ Content optimization.
Optimization and PPC
Focus on listing optimization, marketplace SEO strategy and Sponsored Products campaign structures. Analysis of ACoS, TACoS and SKU profitability.
Cross-border sales
First EU expansion projects — Amazon DE, FR, IT, ES. Experience with content localization, VAT, cross-border logistics, Kaufland and eMAG.
Processes and scaling
BaseLinker implementation, ERP/WMS integrations, process automation for large catalogues. Consulting for distributors with hundreds or thousands of SKUs.
Consulting and practice
Working with brands, manufacturers and distributors across the Polish and European marketplace landscape. Strategic consulting, audits, operational implementation support.