GA4 Data Engineer

GA4 Data Engineer | Partner Sucsess | Hybrid Working | Hatfield Introduction:
We are Ocado Group, and we're bringing world-class automation to online grocery. Our Ocado Smart Platform (OSP) combines cutting-edge robotics, AI, and IoT within our advanced CFCs (Customer Fulfilment Centres). We've mastered the single pick, transforming online delivery for our global partners. Join us and be part of a team pushing the boundaries of retail technology.

About the Role We're looking for a skilled Data Engineer to own the end-to-end setup, maintenance, and quality assurance of Google Analytics 4 (GA4) across our global partner ecosystem. Sitting at the intersection of analytics, data engineering, and partner enablement, you will support our international retail partners in operating the Ocado Smart Platform effectively. You will lead GA4 e-commerce event implementations on both web and app platforms, conduct robust tracking audits, and act as a trusted consultant to help partners measure their marketing and advertising performance accurately.

In this collaborative and partner-facing role, you will work closely with data engineering, product, and the wider Solutions Analytics teams. You will play a key part in our Analytics Hub initiative, enabling partners to share GA4 data for deep analysis and reporting. By defining, embedding, and routing critical metrics to internal datasets and downstream Looker reports, you will empower our partners with the high-quality, actionable data they need to make strategic, data-driven commercial decisions.

• Lead the end-to-end implementation of GA4 e-commerce events across OSP web and app via Google Tag Manager (GTM) and Firebase SDK, including legacy migrations.
• Configure and manage GTM containers, GA4 properties, accounts, and raw Big Query data exports.
• Conduct comprehensive GA4 implementation audits to identify and resolve tracking issues, mismatched events, and discrepancies between web and app.
• Maintain a centralised GA4 tracking sheet detailing implementation status, known issues, change logs, and utilisation insights.
• Serve as the primary GA4 consultant for global partners, supporting them with implementation, business-as-usual query resolution, and strategic decisions.
• Deliver GA4 and GTM training workshops and facilitate post-implementation check-ins with partners.
• Configure Big Query integrations and support downstream Looker reporting on GA4 data.
• Collaborate with data engineering to ingest GA4 data into internal datasets and maintain robust data pipelines.
• Support the Analytics Hub initiative alongside partners' GA4 upgrade and maturity planning.
• Define and embed key performance metrics for marketing and advertising effectiveness into partner reporting.

• Hands-on experience with GA4 (ideally implementation)
• Proficiency in e-commerce event tracking and debugging using tools like Debug View and Tag Assistant.
• Experience using Big Query for raw GA4 data analysis.
• Familiarity with Looker or other business intelligence (BI) tools.
• Experience with Salesforce Marketing Cloud or CRM integrations.
• Strong communication and stakeholder management skills, with the ability to translate technical tracking concepts for non-technical partners.
• Proven capability to manage multiple partner work streams simultaneously.

• Experience with Analytics Hub or data-sharing pipelines.
• Knowledge of attribution methodologies (data-driven vs. rules-based, multi-touch, incrementality) and building custom attribution models in SQL/Big Query.
• Experience running training sessions, enablement workshops, or working with retail media/onsite advertising measurement.
• Curiosity about AI, including experience using tools like Claude and managing Model Context Protocol (MCP) servers.

• Time to recharge: 25 days annual leave (rising to 27 after 5 years), plus the option to buy more – and 30 days a year to work from anywhere in the world.
• Health & wellbeing:
  Private Medical Insurance from your first month, wellbeing support through specialist apps and EAP, plus Income Protection and Life Assurance.
• Family-first policies: 22 weeks paid maternity/primary carer leave…