Core Web Vitals Expert

Hello, let’s meet!

We are Xebia - a place where experts grow. For nearly two decades now, we've been developing digital solutions for clients from many industries and places across the globe. Among the brands we’ve worked with are UPS, McLaren, Aviva, Deloitte, and many, many more.

We're passionate about Cloud-based solutions. So much so, that we have a partnership with three of the largest Cloud providers in the business – Amazon Web Services (AWS), Microsoft Azure & Google Cloud Platform (GCP). We even became the first AWS Premier Consulting Partner in Poland.

Formerly we were known as PGS Software. In 2021, we joined Xebia Group – a family of interlinked companies driven by the desire to make a difference in the world of technology.

Xebia stands for innovation, talented team members, and technological excellence. Xebia means worldwide recognition, and thought leadership. This regularly provides us with the opportunity to work on global, innovative projects.

Our mission can be captured in one word: Authority. We want to be recognized as the authority in our field of expertise.

What makes us stand out? It's the little details, like our attitude, dedication to knowledge, and the belief in people's potential - emphasizing every team members development. Obviously, these things are not easy to present on paper – so make sure to visit us to see it with your own eyes!

Now, we've talked a lot about ourselves – but we'd love to hear more about you.

Send us your resume to start the conversation and join the #Xebia.

You will be:

• managing current portfolio and calculating associated performance metrics (return,
  risk metrics, holdings, etc.)
• screening for new ideas (ie. discovering companies/stocks that may be interesting to
  add to portfolio)
• visualizing time series data and integrating new datasets to companies/stocks
• taking care of code quality and readability,
• developing professionally under the guidance of your Team Leader.

Requirements

• 
  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.

Nice to have:

• Strong analytical mindset with problem-solving abilities,
• Effective communication skills for collaboration with designers, developers, and SEO teams,
• Passion for web performance, user experience, and modern frontend development trends.

Recruitment Process:

CV review – HR Call – Technical Interview – Client Interview – Decision