Frontend Engineering
Reduce Unused JavaScript — Without Re-launching Your Site
Build-pipeline + runtime fixes without breaking the design
Senior engineers · IST + EST overlapNDA on day 124-hour reply
The problem
What you're seeing
PageSpeed says "Reduce unused JavaScript — 400 KiB" and your bundle analyser confirms it.
How we fix it
Our approach
We tree-shake polyfills, dead-code-eliminate unused utilities, code-split per route, and lazy-load third parties. Shipped JS drops by half.
What you get
Concrete deliverables, no fluff
Every engagement ends with measurable, documented outcomes — no black-box agency reports.
Diagnostic report with reproducible steps
Implementation merged behind a PR you review
Verified fix across browsers and devices
Knowledge transfer to your engineering team
Tooling we use
Industry-standard stack, no proprietary lock-in
TypeScriptWebpackViteesbuild