CRO Developer

CRO Developer £50,000 - £60,000 Hybrid - Manchester (3x days per week) This is a rare opportunity to join a growing digital business where experimentation sits at the heart of decision making. With strong investment in CRO and testing, you will play a key role in creating, deploying, and analysing experiments across high traffic digital platforms. This position offers the chance to make a direct commercial impact while working with modern experimentation tools and technologies. The Company They are an established digital performance business operating across multiple international markets. Through a portfolio of proprietary digital platforms, they manage and optimise the full customer journey from acquisition through to conversion. Their data-driven approach to growth has created a strong culture of experimentation, with significant opportunities to improve customer experiences through testing. Continued expansion has led to investment in building internal CRO and experimentation capability. The Role As a CRO Developer, you will be responsible for building, implementing, and maintaining A/B tests and experiments across a range of digital products. You will work closely with analysts, marketers, designers, and stakeholders to translate hypotheses into live experiments that drive measurable business results. • Build and deploy A/B and multivariate tests using HTML, CSS, and JavaScript • Develop high-quality experiment code across websites and digital platforms • Work with CRO and product stakeholders to turn testing ideas into live experiments • Implement personalisation and experimentation campaigns using leading CRO tools • Ensure experiments are technically robust, performant, and accurately tracked • Debug, troubleshoot, and optimise testing implementations • Collaborate with analytics teams to support experiment measurement and reporting • Contribute to experimentation best practices, processes, and governance • Identify technical opportunities to improve customer journeys and conversion performance Your Skills & Experience • Strong commercial experience as a CRO Developer, Front End Developer, or Experimentation Developer • Hands-on experience building and deploying experiments using HTML, CSS, and JavaScript • Experience with CRO and experimentation platforms such as Optimizely, VWO, AB Tasty, Convert, Dynamic Yield, or similar • Strong understanding of A/B testing methodologies and experimentation principles • Experience working with web analytics and performance measurement tools • Ability to write clean, efficient, and maintainable front-end code • Understanding of customer journeys, user behaviour, and conversion optimisation • Comfortable working closely with technical and non-technical stakeholders • Experience within performance marketing, ecommerce, lead generation, or high traffic digital environments is beneficial What They Offer • £50,000 - £60,000 base salary • Bonus scheme • Hybrid working model with flexibility • Opportunity to help shape a growing experimentation function • Exposure to high traffic digital products and large-scale testing programmes • Strong career progression opportunities • Collaborative and data-driven environment How to Apply If you are a CRO Developer with experience building and deploying experiments using HTML, CSS, and JavaScript, apply now to learn more about this opportunity.