Senior Frontend Engineer

Working for a market leading ecommerce company with revenues in the hundreds of millions, the Senior Frontend Engineer will help shape how customers experience their website and app. You'll bring test plans to life - building A/B experiments, QA-ing them thoroughly, then digging into the results with analysts to understand what's working and why. This is a hands-on role sitting within a small engineering team embedded in Marketing, working closely with Ecommerce, Analytics and Product. The Frontend Engineer will be responsible for: Owning the build and deployment of website experiments using HTML, CSS and JavaScriptTranslating test plans into robust, production-ready A/B testsEstablishing and running QA processes across browsers and devicesAnalysing live test data to assess performance and iterateSetting engineering standards and reviewing code for quality and scalabilityBringing genuine commercial thinking - challenging test plans, not just executing themCollaborating closely with Ecommerce, Marketing, Product and Engineering stakeholders The Frontend Engineer will have: Strong front-end engineering skills (HTML, CSS, JavaScript)Ideally worked on experimentation, A/B testing and conversion rate optimisation (CRO)Ideally come from ecommerce organisationsA commercial mindset - comfortable challenging stakeholders, not just taking instructionConfidence communicating with technical and non-technical stakeholdersCuriosity, problem-solving instinct and comfort working independently in a small, senior team This is a great opportunity for a talented Front Engineer to join a household name brand and work on what is a huge revenue driver for the business. They can offer great career progression and the opportunity to mentor other Engineers straight away. Frontend Engineer – CRO & Experimentation London / hybrid (3 days in office) £55k + 20% bonus + benefits