Who 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
In this newly created role as Senior Performance Marketing Manager your primary responsibility is to maximise incremental GMV and contribution from Google & Bing Shopping/PMax through world‑class campaign architecture, feed intelligence, and efficiency control. Success is measured in incremental revenue and contribution/day, not ROAS. You are OnBuy’s deep technical expert across Google Shopping, Bing Shopping, Search, and PMax. You own and design the entire Shopping ecosystem end‑to‑end: structure, segmentation, labels, feed quality, bidding logic, Merchant Center health, and commercial optimisation.This is a hands‑on individual contributor role, not a strategist position. Key Responsibilities: Shopping & PMax Architecture OwnershipOwn the full Shopping & PMax architecture, including: Campaign tiers & prioritiesListing group designCustom label frameworksNegative structuresFeed‑driven segmentationEnsure structural scalability across tens of thousands of campaigns and millions of SKUs, including automation of campaign creation, routing, and lane governance.”Control the interplay between PMax and Standard Shopping, ensuring optimal margin, traffic shaping, and signal control.Design and maintain complex, feed‑driven segmentation frameworks for millions of SKUs, including product eligibility tiers, performance cohorts, and commercial signals.Architect and manage multiple optimisation environments to ensure clean Smart Bidding signals, scalable growth across product groups, and controlled exploration.Own CSS account strategy including bid separation logic, feed‑exclusion rules, and optimisation of commission/auction mechanics.Feed, Merchant Center & DiagnosticsOwn full Merchant Center health: schema, feed rules, disapprovals, diagnostics, and error remediation.Build and maintain advanced labelling systems for commercial signals, product scoring, seller quality, and activation logicTranslate commercial conditions (margin, fee bands, seller activation) into schema logic.Contribution & Incrementality OptimisationOptimise towards incremental GMV and contribution, not ROAS.Use propensity modelling outputs, EXTA parameters, decile segmentation, and SKU-level economics to shape structure and bids.Lead the Daily Trading Room: identify opportunities, isolate issues, and deploy rapid interventions.Work with Data/BI teams to operationalise performance‑based product movement rules, activation logic, and automated routing systems that dictate bidding exposure
Efficiency & Wastage ReductionOwn wastage elimination across: Query sculptingNegative structure hygieneAsset group disciplineBudget pacing rulesLow-value SKU suppressionImplement robust recovery and oxygen playbooks for campaigns requiring stabilisation.Own campaign‑lane health: monitor lane density, merge/split structural segments as needed, and maintain strong learning conditions across very large SKU sets
Measurement & Technical LeadershipOwn and improve tracking approaches across PMax, Shopping Profit frameworks, and revenue tracking systems.Ensure structure and tracking changes are documented, measurable, and repeatable.Partner with Data Science to operationalise propensity segmentation.Own end‑to‑end conversion tracking integrity, including server‑side conversions API, GTM audits, feed attribution, and ongoing monitoring of tracking capture rates vs internal GMV Vendor, Automation & Partner Governance Manage and commercially challenge third‑party Shopping vendors and automation partners, including audit of bidding decisions, versioned change‑history accountability, and validation of performance claimsRequirementsEssentialTrue super‑expert in Google Shopping & PMax: priorities, campaign types, listing groups, negative logic, feed rules, schema versioning, MC troubleshooting. Deep Merchant Center expertise.Experience operating in a multi‑million SKU marketplace environment Confident with contribution-based optimisation and rapid trading cycles. Strong analytical capability and comfort with experimentation. Hands‑on ownership of Google Merchant Center including schema troubleshooting, attribute debugging, disapproval resolution and feed‑rule design.Proven experience designing Google Shopping/PMax architecture — including campaign tiering, listing‑group design, negative‑logic frameworks, and feed‑driven segmentation.Ability to build and maintain custom label frameworks tied to commercial logic (e.g., margin tiers, stock states, product groups, performance segmentation).Experience managing Shopping/PMax for large catalogues at scale (100,000+ SKUs minimum; ideally 1M+).Demonstrated capability implementing SKU‑level contribution or profit‑based bidding logic.Experience controlling PMax signal pathways — preventing contamination, isolating high‑value SKUs, and shaping traffic using feed‑level engineering.Ability to diagnose and repair issues across the entire chain: Feed → Merchant Center → Ads → PMax/Shopping.Experience with inventory filtering, multi‑tier segmentation (L1/L2/L3) or equivalent layered Shopping systems.Hands‑on experience with feed tools (Channable, DataFeedWatch, Intelligent Reach, or custom internal feeds) beyond surface‑level usage.Ability to run structured architecture tests (campaign consolidation, label schema redesigns, feed experiments).DesirableFamiliarity with profitability modelling or dynamic pricing. Experience with BI tools or SQL. Experience with automation (scripts, feed tools). BenefitsThe salary on offer for this role is £75000- £85000 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 Holidays1 extra day off for your BirthdayEmployee Assistance ProgrammePerks at Work benefit platformOpportunities for career development and progressionThis role is a Hybrid role working 1-2 days from our offices in Media City, Manchester or Bournemouth's offices.
It can be UK remote but you must be willing to travel to one of our offices when needed. Our CommitmentOnBuy 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 candidates.If someone reaches out this way, it isn’t us and let the recruitment team know.
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