Head of Performance Marketing

We are hiring a Head of Performance Marketing to own and scale OnBuy’s performance marketing engine. This role is accountable for delivering GMV growth at target contribution across a ~£200m+ portfolio through segmentation, systems, data activation, and disciplined experimentation. This is not a brand marketing role. This is a trading + systems role focused on building a scalable growth engine.

What you Will Own

• Full ownership of performance marketing across Google Shopping, Bing, Affiliates (incl. CSS), CRM, and selected paid social channels.
• Google/Bing Shopping solution ownership, evolution, governance, and performance.
• Channel mix, budget allocation, and contribution guardrails
• Propensity model activation: how predictive signals are tested, trusted, and operationalised.
• Measurement truth: incrementality, halo, MMM, attribution
• Vendor and tooling strategy: controlled testing of platforms vs internal systems.
• Weekly GMV, contribution, and spend performance across all markets.
• Performance marketing team structure, hiring, and development.

Key Responsibilities

1. Commercial & Strategic Leadership

• Own GMV growth at target contribution across all performance channels and markets.
• Set channel mix, investment guardrails, pacing rules, and scaling strategy.
• Partner closely with Finance to forecast spend, GMV, and contribution/ROI

1. Segmentation & Activation

• Define segmentation across department, margin band, seller ID, and performance tiers.
• Ensure segments are tested & activated across other channels (Channel activation strategy)
• Translate propensity and LTV models into activation.

1. Channel Strategy

• Shopping: segmentation, waste control, and reporting dashboards.
• Affiliates: partner strategy and contribution control.
• CRM: lifecycle strategy and retention growth.
• Leverage deals, app, retention strategy