Lead CRO Developer
Listed on 2026-08-29
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Software Development
Front End Developer, Software Engineer, Javascript
We're looking for an experienced Lead CRO Developer to join our Digital Experience team and help shape the future of experimentation and optimisation across our websites. If you're passionate about using technology, data and experimentation to improve customer experiences and deliver measurable business outcomes, we'd love to hear from you.
As our Lead CRO Developer, you'll have access to a wide range of benefits including:
- Hybrid working (we're in the office approximately 2 days per month)
- Access to a generous discretionary profit share scheme
- Colleague discounts on flights and Jet2holidays packages
At and Jet2holidays we’re working together to deliver an amazing journey, literally! We work together to really drive forward a ‘Customer First’ ethos, creating unforgettable package holidays and flights. We couldn’t do it without our wonderful people.
What you'll be doing:Lead Experimentation Delivery:
- Lead the technical delivery of A/B and multivariate tests, ensuring high-quality, performant and scalable implementations across our digital platforms.
- Develop customer experiences using JavaScript, HTML and CSS, creating experiments and personalisation campaigns that improve conversion and user engagement.
- Work closely with UX, Analytics and Marketing teams to translate ideas into measurable experiments and optimisation opportunities.
- Champion experimentation methodologies, coding standards and technical governance, ensuring reliable and statistically sound test implementations.
- Ensure experiments have minimal impact on page performance, accessibility and Core Web Vitals while maintaining an excellent customer experience.
- Mentor developers, conduct code reviews, support technical decision making and help evolve the team's development standards and ways of working.
- Configure and develop within experimentation platforms such as Optimizely, Adobe Target or similar technologies, supporting both client-side and server-side experimentation where appropriate.
- Stay up to date with emerging CRO techniques, browser capabilities and front-end technologies, identifying opportunities to improve our experimentation capability.
- Extensive experience developing A/B tests, personalisation campaigns or optimisation solutions within a commercial environment.
- Expert knowledge of JavaScript, HTML and CSS, with a strong understanding of modern web development principles.
- Experience working with experimentation platforms such as Optimizely, Adobe Target, VWO, AB Tasty or similar.
- Proven leadership experience, including mentoring developers, leading technical discussions and promoting engineering best practice.
- Strong understanding of website performance, accessibility, cross-browser compatibility and responsive design.
- Experience working alongside UX, Product and Analytics teams throughout the experimentation lifecycle.
- Excellent problem-solving skills with a passion for delivering measurable improvements to customer experience and commercial performance.
- Strong communication and stakeholder management skills, with the ability to explain technical concepts to both technical and non-technical audiences.
Join us as we redefine travel experiences and create memories for millions of passengers. At and Jet2holidays
, your potential has no limits.
#LI-Hybrid #LI-MW2
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