Hi, I'm Mariusz Kordek, an E-commerce Manager and Marketplace Specialist with over 15 years of experience helping brands grow across Amazon, Allegro, Erli and Base.com. I specialise in product listing optimization, on-page SEO and multi-channel strategies, driving organic visibility, conversion rate improvements and efficient automation. I enjoy collaborating across teams to deliver measurable results and scalable processes. I thrive on building robust e-commerce operations, implementing data-driven improvements, and expanding partner networks to accelerate growth across B2B and B2C markets.…

Mariusz Kordek

Hi, I'm Mariusz Kordek, an E-commerce Manager and Marketplace Specialist with over 15 years of experience helping brands grow across Amazon, Allegro, Erli and Base.com. I specialise in product listing optimization, on-page SEO and multi-channel strategies, driving organic visibility, conversion rate improvements and efficient automation. I enjoy collaborating across teams to deliver measurable results and scalable processes. I thrive on building robust e-commerce operations, implementing data-driven improvements, and expanding partner networks to accelerate growth across B2B and B2C markets.…

Available to hire

Hi, I’m Mariusz Kordek, an E-commerce Manager and Marketplace Specialist with over 15 years of experience helping brands grow across Amazon, Allegro, Erli and Base.com. I specialise in product listing optimization, on-page SEO and multi-channel strategies, driving organic visibility, conversion rate improvements and efficient automation. I enjoy collaborating across teams to deliver measurable results and scalable processes.

I thrive on building robust e-commerce operations, implementing data-driven improvements, and expanding partner networks to accelerate growth across B2B and B2C markets.

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Language

Polish
Fluent
English
Fluent

Work Experience

Operations Manager / E-commerce & Marketplace Manager at Colostrum Polska Sp. z o.o.
January 1, 2024 - Present
Overseeing multi-channel e-commerce operations across Amazon Seller Central, Allegro, Erli and Base.com; optimizing product listings with meta titles, bullets, A+ content and backend keywords; monitoring Sales Velocity and Conversion Rate; managing customer service, logistics, and BaseLinker automation; developing B2B partnerships and new product onboarding.
Renewable Energy Specialist at EPG
January 1, 2023 - January 1, 2024
Energy consultancy for individual clients; selecting photovoltaic solutions based on ROI analysis; preparing subsidy applications (Mój Prąd, Czyste Powietrze); creating commercial offers and investment profitability calculations.
Sales Coordinator at RES ENERGY Burza Gołaszewski Wardaszko Sp. J.
January 1, 2020 - January 1, 2023
Management of a portfolio of 100+ B2B and 400+ B2C clients in the photovoltaic sector; end-to-end PV project delivery (design with PVSol, up to 150 kW) and installation supervision; tender documentation and subsidy applications.
Sales Specialist at BUD-WIL Audiotuning
January 1, 2018 - January 1, 2020
Management of an Allegro store in automotive/audio segment; B2B and B2C customer service; listing optimization and image/description improvements; acquisition of new B2B contractors.
International Sales Coordinator at Suszek Design Sp. z o.o.
January 1, 2013 - January 1, 2018
B2B sales on international markets (hospitality industry, interior furnishings); end-to-end sales process from quotation to project completion; coordination with international clients; COMARCH ERP usage.
Owner at MD Trans
January 1, 2010 - January 1, 2012
Owner of an international freight forwarding company; route planning, cost optimization, and development of a B2B client base.
International Freight Forwarder at Herman-Trans
January 1, 2008 - January 1, 2009
Organisation of international freight transport (Western Europe); management of CMR and customs documentation.

Education

Bachelor of Science in Computer Network and Systems Administration at University of Information Technology and Economics TWP, Olsztyn, Poland
January 1, 2005 - January 1, 2008
Language Programme — Spring International Language Center at University of Arkansas, Fayetteville, USA
January 1, 2006 - January 1, 2006

Qualifications

Microsoft IT Academy Programme — Microsoft Technologies
January 1, 2007 - March 25, 2026
Leonardo da Vinci Internship — Noble IT Solutions Ltd, Newton Abbot, Devon, UK
January 1, 2008 - March 25, 2026

Industry Experience

Retail, Software & Internet, Wholesale & Distribution, Professional Services, Energy & Utilities