Web Performance Engineering Lead

Job Description Were looking for a Web Performance Engineering Lead to take ownership of the technical performance of the Protein Works website.This is a hands-on engineering role sitting at the point where Technology, ecommerce and performance marketing meet.Youll be responsible for making our website faster, more stable and easier to buy from, identifying the technical issues and opportunities that have the biggest impact on customer experience and commercial performance.Were looking for someone who thinks beyond whether a website simply works. Youll care about every millisecond of load time, every unnecessary script, every broken tracking event and every point of friction standing between a customer landing on our website and completing their order.Youll report directly into the Sales & Marketing Director, giving you close access to our commercial priorities, performance data and experimentation roadmap. Youll also work closely with our Technology Director, ensuring everything we build meets the technical standards required of a high-growth ecommerce business.About Protein Works Protein Works is a high-growth DTC nutrition brand with a clear mission: help people live healthier, happier lives through the power of nutrition.If you want to join a business with the energy of a challenger and the foundations of a market leader, this is the right moment to do it.What You'll Do Own front-end performance end to end across desktop and mobile, driving measurable improvements in Core Web Vitals (LCP, INP and CLS) on the journeys that matter most to revenue.Dig into conversion data by device, browser, channel and journey to find where friction is costing us sales, then turn those findings into a prioritised, commercially weighted performance roadmap.Build and run experiments, from quick front-end variants to full A/B tests and feature-flagged releases, and use the results to shape what we build next.Protect our tracking and measurement, working closely with Marketing and Data to catch discrepancies in GA4, GTM and the data layer before they cost the business insight.Use AI-assisted engineering tools to work faster, and build the monitoring that catches performance and tracking regressions before they become commercial problems.Ideal Candidate Strong commercial front-end engineering experience (JavaScript/TypeScript, HTML, CSS, modern frameworks) and comfortable taking ownership of a high-traffic ecommerce website.You genuinely know your way around Core Web Vitals and browser profiling tools such as Chrome DevTools, Lighthouse and WebPageTest, and can turn why is this slow into a shipped fix.you dig into the data, form a hypothesis and go find the answer yourself.You can explain a complicated website issue to someone in Marketing without needing them to become an engineer first. xkybehq Restless about improvement: you know a website is never finished, and you're always looking for the next thing to make faster, simpler or easier for the customer.Benefits Exclusive staff discountsPrivate healthcareBirthday day offPension schemeUnique bonus schemeCycle to work schemeAccess to retail discountsStaff socials and eventsState of the art PW CampusWFH on FridaysRefreshments on-siteREF-230257