Harnham
CRO Developer
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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.
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- 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
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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.
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