Lead CRO Developer

Role overview 

We are looking for a highly experienced, hands-on Lead CRO Developer to build and deliver A/B and multivariate experiments across our client accounts. This is fundamentally a development role. The majority of the role is hands-on coding, implementation, QA and troubleshooting of experiments, not CRO strategy, programme management, or roadmap ownership. 

You will take test designs and specifications and turn them into robust, production-ready experiments across enterprise experimentation platforms. As the lead developer, you will also act as the technical escalation point for complex builds and help maintain high development and QA standards, while remaining deeply hands-on day to day. 

What you will be doing 

• Build A/B and multivariate experiments from supplied concepts, designs and test specifications. 

• Write clean, robust JavaScript (ES6+), HTML5 and CSS3 to create experiment variations and functionality. 

• Develop experiments within Optimizely and other enterprise testing platforms including VWO, AB Tasty, Convert, Monetate and similar tools. 

• Build experiments within modern React and Next.js environments, including single-page applications and dynamically rendered experiences. 

• Handle technically complex tests involving DOM manipulation, application state, targeting,