Who are OnCommerce?

OnCommerce is a global selling platform that powers a growing network of retail channels, including:

• OnBuy - The only marketplace in the world to give customers instant Cashback on everything
• easyShop - An all-new marketplace created in collaboration with the easy® family of brands
• Comet - The iconic UK tech brand making its return later this year

OnCommerce is growing fast, launching new brands and scaling to power the future of ecommerce.

Be Part of the Story

OnCommerce is constantly evolving. Everyone here plays a hands-on role in shaping what comes next, building brands that make an impact across global markets. There’s no red tape or rigid corporate structure; just smart people taking ownership and figuring things out as we build something big together. The pace is fast, priorities shift, things aren’t always perfectly set up, and you’ll often need to get stuck in and solve problems. But if you thrive in that kind of environment, you’ll have real influence, real ownership, and the chance to grow with a rapidly scaling business.

About the Role

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

2.      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.
  

3.      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.
• Paid social: structured test-and-scale approach.
  

4.      Measurement & Experimentation

• Own incrementality testing and attribution.
• Test, try, kill or adopt new growth channels.
• Publish monthly performance insights.
  

5.      Operating Model

• Run weekly growth forums – The company has ambitious growth targets and WoW growth is now vital.
• Set guardrails, stop-loss rules, and alerts.
  

6.      Team Leadership

• Lead Senior Shopping, Affiliates, and CRM manager.
• Build a lean, automation-focused team.

What This Role Is Not

• This is not a brand or ATL marketing role.
• This is not a passive stakeholder role.
• This is not an agency-management-only role.

This role exists to build systems, drive growth, and deliver measurable outcomes.

• Senior performance marketing leadership experience in ecommerce or marketplace environments.
• Deep practical expertise in Google Shopping and large-scale catalogue activation.
• Experience operating at scale in a large SKU environment.
• Strong understanding of incrementality, attribution, and experimentation.
• Deep understanding of segmentation and incrementality
• Experience working alongside data science and engineering teams.
• Strong commercial and data-led mindset.
• International experience across UK and EU markets. US experience would be advantageous.
• Comfortable operating at both strategic and hands-on levels.
• Proven experience in leading a lean performance marketing team