Requirements: English
Company: Xebia sp. z o.o.
Region: Wrocaw , Lower Silesian Voivodeship
You will be: analyzig and optimizing web performance with a focus on Core Web Vitals (LCP, FID, CLS), improving site speed using tools like Google Lighthouse, PageSpeed Insights, and Chrome DevTools, optimizing JavaScript, HTML, and CSS for better performance and faster rendering, identifying and eliminate render-blocking resources to enhance page load speed, enhancing React.Js application performance and reduce unnecessary re-renders. Your profile: 3+ years in web performance optimization, with a strong focus on Core Web Vitals (LCP, FID, CLS), strong expertise in JavaScript (ES6+) , HTML5 , and CSS3 , including performance-oriented coding techniques, hands-on experience in analyzing and optimizing web performance using: Google Lighthouse, PageSpeed Insights, WebPageTest, Chrome DevTools, strong understanding of critical rendering path, render-blocking resources, and browser rendering behavior, experience in React.Js performance optimization, experience in improving Time to First Byte (TTFB) and optimizing server response times, fluent English (min. B2) Work from the European Union region and a work permit are required Recruitment Process: CV review HR Interview Technical Interview Client Interview Decision Benefits Development: development budgets of up to 6,800 PLN, we fund certifications e.G.: AWS, Azure, access to Udemy, O'Reilly (formerly Safari Books Online) and more, events and technology conferences, technology Guilds, internal training, Xebia Upskill. We take care of your health: private medical healthcare, multiSport card - we subsidise a MultiSport card, mental Health Support. We are flexible: B2B or employment contract, contract for an indefinite period.