CRO & Experimentation Specialist

We're recruiting on behalf of one of the UK's fastest-growing e-commerce businesses for a CRO & Experimentation Manager to find growth opportunities, enhance the customer journey, and increase revenue across their digital platforms.

This is a hands-on role - strategic and executional. You'll work within the marketing team, partnering with performance and channel-owning teams to optimise website performance, deliver personalised experiences at scale, and make data-driven decisions that drive measurable commercial impact. The business operates at high volume with daily product launches, so the pace is fast and the opportunity to test, learn and improve is constant.

What you'll do

• Lead the continuous optimisation of the customer experience across all key conversion metrics - and challenge where necessary
• Design, build and deploy A/B and multivariate tests end-to-end, defining KPIs, supporting QA and measuring statistical significance to inform clear recommendations
• Use segmentation and targeting strategies to deliver personalised experiences that improve conversion and engagement
• Analyse user behaviour using GA4, BigQuery and additional tools to identify conversion bottlenecks, build dashboards and provide actionable insights
• Optimise the full customer journey: product landing pages, positioning, navigation, nudges, personalised interactions and promotional assets
• Deliver recommendations for testing new approaches to increase AOV, retention and conversions across product lines including the membership offering
• Partner with Operations, Marketing, Product Development and Performance teams to ensure alignment with business goals
• Deliver clear, actionable post-test reports that track performance and inform future strategy
• Use browser developer tools to debug and ensure flawless execution across devices and browsers

What you should bring

Essential

• Significant experience in e-commerce optimisation and A/B testing with a strong understanding of CRO and UX principles in a fast-paced, B2C digital environment
• Hands-on experience with CRO and personalisation platforms, including building and deploying experiences independently
• Strong front-end skills: CSS, HTML and basic JavaScript/jQuery for styling and dynamic content manipulation
• Ability to manage multiple workstreams from data-driven ideation through to execution, meeting deadlines and delivering high-quality outcomes
• Strong analytical mindset with the ability to interpret data from multiple sources and create clear visualisations and insights
• Experience with GA4, and familiarity with BigQuery - though the business is open to new tools you recommend. Basic SQL knowledge is a plus
• Exceptional communication skills - confident presenting findings and recommendations to stakeholders, and visualising complex outcomes concisely

Desirable

• Experience managing third-party testing tools and vendor relationships
• Background in gaming, competitions, subscriptions or high-frequency transactional ecommerce
• Experience with App Store Optimisation (ASO)

Why this role

This is genuine ownership of the experimentation and optimisation function in a business that's scaling rapidly and investing heavily in its digital experience. You won't be waiting for a test queue or fighting for developer resource - you'll be hands-on, moving fast, and directly influencing commercial outcomes. If you want to see the impact of your work in real time, this is a compelling environment to do it.