How We Boosted Frontend Performance by 300% at QIC Digital Hub

By Aleksandr Kazantsev, Frontend Developer at QIC digital hub
Full technical deep-dive available on our Medium publication

The Performance Transformation
Before Optimization:

• LCP: 4 seconds
• FCP: 3.77 seconds
• CSS Bundle: 235 KB

After Optimization:

• LCP: 1.91 seconds (52% improvement)
• FCP: 967.9 ms (74% improvement)
• CSS Bundle: 10 KB (96% reduction)

💡 What Actually Worked
1 SSR with Nuxt.js
Migrating from CSR to SSR delivered immediate SEO and performance wins.

2 Lazy Component Loading
Reduced initial JavaScript bundle by 35%:

<LazyFeaturePopup v-if="showFeature" />

3 CSS Purification
Eliminated 96% of unused styles:

*.js

JavaScript
// vite.config.js
cssPurifier({
  selectors: [/btn/, /input/, /loader/]
})

4 Modern Image Optimization
WebP conversion with strategic loading attributes.

Business Impact

• 15% better mobile conversion rates
• Improved user satisfaction metrics
• Better SEO performance

Tool Stack
Nuxt.js 3 • Vite • css-purifier • WebP

Want the Full Technical Breakdown?

Read the complete article with:

• Detailed code examples and configurations
• Step-by-step implementation guide
• Performance measurement methodology
• Custom BaseImage component code
• Team collaboration insights

Read the full technical deep-dive on Medium.