Marketplace Growth Manager | E-commerce & Sales Development
I grow salesI increase profitabilityI automate processes
I build and grow marketplace sales — from channel launch and advertising to analytics, optimization and automation.
WHAT I BRING TO THE BUSINESS
I grow sales. I improve performance. I automate
I launch and grow sales channels
I launch products on new marketplaces and develop existing accounts across catalog, content, SEO, advertising, pricing and promotions.
Launch → Optimize → GrowI find growth opportunities in data
I analyze sales, advertising, assortment and competitors to identify what should be scaled, optimized or discontinued.
Analyze → Decide → ImproveI reduce manual work
I automate reporting, advertising monitoring, catalog operations and recurring workflows using APIs, Python and AI.
Less manual work → More control → Faster scalingHOW I WORK
From analysis to results
Analysis
I analyze sales, competition, costs and market potential to identify problems and growth opportunities.
Strategy
I define goals, priorities and an action plan based on sales potential and profitability.
Execution
I implement solutions and optimize offers, advertising campaigns and operational processes.
Optimization
I monitor KPIs, review results and expand the activities that deliver the strongest outcomes.
PROFITABILITY
Marketplace profitability and financial analysis
I analyze product, packaging, logistics, marketplace commission and advertising costs. I compare sales-channel economics and identify opportunities to improve profitability.
Cost analysis · Channel profitability · Pricing strategy · ROAS / ACOS / TACOSBUSINESS DECISIONS
Not every increase in sales means higher profit
Before launching a channel, I assess its potential, costs and likely profitability. I compare marketplace performance and recommend solutions with a sound business rationale.
SELECTED PROJECTS
Results I've Delivered
Growing sales on Amazon.de
Amazon Ads · Offers · Customer feedback · Sales analytics
Managing and growing Allegro sales
2000+ SKU · Allegro Ads · Analytics · API · Automation
Launching and growing Leroy Merlin
Launch from zero · Mirakl · Catalog · Retail Media
Launching sales on Castorama
Channel launch · Catalog integration · Pricing · Availability
PLATFORMS
Platforms I've Worked With
Experience across marketplace management, catalogs, advertising, integrations and product visibility.
AmazonMarketplace
AllegroMarketplace
Leroy MerlinMarketplace
CastoramaMarketplace
EmpikMarketplace
Media ExpertMarketplace
MoreleMarketplace
CeneoMarketplace
TikTok ShopMarketplace
Facebook MarketplaceMarketplace
Google Merchant CenterProduct & advertising channelHow I develop a marketplace
Sales potential · competition · pricing · assortment
Integration · account setup · marketplace requirements
Offers · SEO · content · attributes
Advertising · promotions · visibility
Sales · ROAS · profitability · competitors
Budget · prices · offers · processes
Automation · assortment · new opportunities
APPROACH
I treat a marketplace as a business, not a collection of separate tasks
Sales, advertising, assortment, pricing, analytics and operations are interconnected. I start with the business goal and data, implement the right change, then automate what can be scaled.
AUTOMATION
Less manual work. More possibilities
I build practical solutions that save time, improve control and make e-commerce operations easier to scale.
Automated reporting
Automatic collection, processing and presentation of sales and advertising data.
Monitoring and analytics
Automated monitoring of KPIs, advertising campaigns, competitors and important changes.
Operations automation
Catalog workflows, API integrations and repeatable operational processes.
REAL IMPLEMENTATION
Marketplace process automation
Automating promotional price updates reduced the process from around two hours to five minutes.
Python · REST API · Playwright · AIABOUT
E-commerce is more than marketplace administration
I work with e-commerce and marketplaces end to end: from launch and daily channel management to advertising, analytics and automation.
I look beyond how a platform works to understand its impact on sales, margin and the wider business. That is why I combine commercial work, performance marketing, data and technology in one system.
I can launch a channel, find growth opportunities and build processes that remain manageable as the business scales.
CONTACT
Let’s talk
Have a project, opportunity or challenge worth discussing? Send me a message and I’ll get back to you.
Download CV ↓Warsaw, Poland
AmazonAllegroLeroy MerlinCastoramaEmpikMedia ExpertMoreleCeneoTikTok ShopFacebook MarketplaceGoogle Merchant CenterAmazonAllegroLeroy MerlinCastoramaEmpikMedia ExpertMoreleCeneoTikTok ShopFacebook MarketplaceGoogle Merchant Center