Seller Catalogue Manager
OnBuyWho are OnBuy?
OnBuy are an online marketplace who are on a mission of being the best choice for every customer, everywhere.
We have recently been named one of the UK's fastest-growing tech companies in the Sunday Times 100 Tech list.
All achievements we are very proud of, but we don't let that go to our head. We are all laser focused on our mission and understand the huge joint effort ahead of us needed to succeed.
Working at OnBuy:
We are a team of driven and motivated people who thrive when working at pace. To succeed at OnBuy you need to take charge and fully own your responsibilities, rolling your sleeves up when needed to 'get it done'. Working at OnBuy you are surrounded by so much opportunity, but you must possess the ability to stay focused and prioritise ruthlessly. Most importantly, you will thrive in an ever-changing environment as we are constantly evolving.
At OnBuy, you're not just a number or another cog in a machine. We are creating something really special, and you have the opportunity to affect meaningful change and have your voice heard. We are a close team, who have the opportunity to learn and grow as OnBuy evolves.
About the Role
The Seller Catalogue Manager owns the quality, competitiveness and visibility of our marketplace catalogue across the UK and International Markets. The primary responsibility is to ensure seller data is accurate, enriched and fit for purpose, and to turn that high-quality data into clear, actionable trading insights.
This role does not directly execute seller-facing actions. Instead, it generates a structured pipeline of opportunities e.g. content fixes, pricing gaps, availability issues, GTIN/GS1 integrity, search visibility improvements that are passed to Seller Success and Sales to activate in line with our Lead Scoring Methodology.
Key Responsibilities
Catalogue Quality & Seller Data Leadership (Primary Mandate)
- Own end-to-end seller data quality across the UK, EU and US.
- Enforce data acceptance rules (accept, optimise, suppress or return-to-seller).
- Maintain standards for images, titles, attributes, GTINs/GS1, encoding and duplicate prevention.
- Own taxonomy, category hierarchy, product mapping and catalogue segmentation.
Ensure international readiness through correct language, symbol and encoding rules.
Trading Insight & Opportunity Generation
- Analyse visibility, search rank, competitiveness, conversion, GMC health and availability.
- Identify category, brand, seller and product-level opportunities.
- Produce structured "opportunity packets" for Seller Success & Sales (issue, action, size of prize).
- Prioritise opportunities using Trading Score, Lead Score and propensity-to-improve signals.
- Detect and remove ghost products and incorrect category placements.
- Improve search/browse relevance through data quality and mapping fixes.
- Define rules for surfacing, suppressing or boosting products based on competitiveness and data quality.
- Collaborate with Buyer Experience and Tech on ranking logic, filters and visibility signals.
- Maintain pricing accuracy across regions and detect market misalignment.
- Segment products into pricing buckets (KVI, premium, long-tail, substitution-sensitive).
- Surface pricing-led trading opportunities for Seller Success & Sales to execute.
- Ensure top brands meet high standards for images, GTINs, content and compliance.
- Improve visibility and conversion of feature brands through data and competitiveness insights.
- Partner with Marketing on brand-level discovery, merchandising and campaigns.
- Ensure catalogue data meets GMC requirements for GTINs, categorisation, attributes and pricing.
- Reduce GMC disapprovals and improve impression share by elevating data quality.
- Use GMC data to surface further content/output optimisation opportunities.
Essential
- Marketplace or eCommerce trading, catalogue or category operations experience
- Strong understanding of product data, attributes and taxonomy
- Analytical ability to turn data into actionable opportunities
- Strong cross-functional communication and influence
- Commercial awareness and attention to detail
- Must be comfortable building the trading function from the ground up including frameworks, processes, segmentation logic and methodologies.
- Ability to handle large, unstructured datasets and segment them into actionable cohorts using robust repeatable methods.
- Capable of defining scalable trading frameworks such as pricing cohorts, conversion segmentation, attribute completeness scoring, and propensity-to-improve models.
Desirable
- Experience with search platforms, feeds or pricing competitiveness tools
- Exposure to international catalogue management
- Experience influencing teams without direct ownership.
The salary on offer for this role is £60,000 - £70,000 depending on experience.
We also offer the following benefits:
- Company Equity- In return for helping us to grow, we’ll offer you company equity, meaning you own a piece of this business we are all working so hard to build.
- 25 days annual leave + Bank Holidays
- 1 extra day off for your Birthday
- Employee Assistance Programme
- Perks at Work benefit platform
- Opportunities for career development and progression
Plus in return for helping us to grow, we’ll offer you company equity, meaning you own a piece of this business we are all working so hard to build.
This role is Hybrid ( 3 days in the office during probation and 1-2 days after) in our Manchester office space in Media City or central Bournemouth.
Our Commitment
OnBuy is an equal opportunities employer. We are dedicated to creating a fair and transparent workforce, starting with a recruitment process that does not discriminate on the basis of gender, sexual orientation, marital or civil partnership status, pregnancy or maternity, gender reassignment, race, colour, nationality, ethnic or national origin, religion or belief, disability, or age.
Just a heads up — we never use WhatsApp. or any messaging apps to contact candidatesIf someone reaches out this way, it isn’t us and let the recruitment team know.