OnBuy is looking for a Seller Trading Manager to own the quality, competitiveness, and visibility of our marketplace catalogue across the UK and International markets. You will be responsible for ensuring seller data is accurate and enriched, translating it into clear, actionable insights for other teams to activate.

What You'll Do

Govern seller data quality end-to-end across regions, enforcing rules for content and upholding gold standards for images, titles, attributes, GTINs/GS1, encoding, and de-duplication.
Define and maintain taxonomy, category hierarchy, product mapping, catalogue segmentation, and ensure international readiness.
Analyse visibility, search rank, competitiveness, conversion, GMC health, and availability to generate structured opportunity packets for Seller Success & Sales teams.
Remove ghost products, fix mis-categorisation, and improve search/browse relevance through data, mapping, and surfacing rules.
Maintain accurate regional pricing, detect market misalignment, segment inventory, and surface pricing-led trading actions.
Ensure top brands meet content and compliance standards, lift visibility using data signals, and collaborate with Marketing on discovery and campaigns.
Guarantee catalogue compliance with Google Merchant Center requirements, reduce disapprovals, and grow impression share.

What We're Looking For

Experience in marketplace or eCommerce trading, category management, or product data operations.
Deep understanding of product data structures, taxonomy, attributes, GTINs and GS1 standards.
Hands-on experience with search systems like Solr, Google Merchant Center (GMC), feed management, and competitive pricing.
Analytical capability to translate signals into actionable insights.
Strong communication and storytelling skills to influence cross-functional teams.
High attention to detail with strong commercial judgement.
Experience driving outcomes through others.