You will get React Performance Optimization | Lighthouse 90+ | Core Web Vitals Fix

Arista I.Status: Offline
Arista I. Arista I.
5.0
Top Rated

Let a pro handle the details

Buy Web Application Programming services from Arista, priced and ready to go.
Arista I.Status: Offline
Arista I. Arista I.
5.0
Top Rated

Let a pro handle the details

Buy Web Application Programming services from Arista, priced and ready to go.

Project details

Built fast with Cursor, v0, Lovable, or Copilot — and now failing Core Web Vitals?

AI tools ship features in days but leave behind bloated bundles, layout shifts, and main-thread blocks that kill conversions and Google rankings. I refactor AI-generated (and human-written) React/Next.js codebases into fast, stable, production-grade applications.

What I fix:
 • LCP, INP, and CLS failures are hurting your Search Console report
 • Oversized JS bundles — code splitting, tree shaking, dynamic imports
 • React rendering bottlenecks — wasted re-renders, heavy components
 • Slow mobile experiences and low Lighthouse scores

What you receive:
 • Optimized source code as reviewable PRs
 • Before/after Lighthouse + PageSpeed reports
 • A written report explaining every change
 • Verification that gains hold in production

What sets this apart: I optimize real-user CrUX field data — the number Google actually ranks you on — not just lab scores, and I show you both.

Recent result: React dashboard rendering 7,000+ entities, from severe UI lag to stable 60FPS with LCP under 2.5s.

Not sure which tier fits? Message me your URL — honest answer, no charge.
Programming Languages
HTML & CSS, JavaScript, TypeScript
Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization
What's included
Service Tiers Starter
$349
Standard
$999
Advanced
$2,200
Delivery Time 3 days 5 days 10 days
Number of Revisions
248
Number of Pages
157
Design Customization
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Content Upload
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Responsive Design
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Source Code
Optional add-ons You can add these on the next page.
Fast Delivery
+$150 - $500
Additional Revision
+$99
Additional Page (+ 2 Days)
+$159
Performance Monitoring Setup (+ 1 Day)
+$249
Full Bundle Audit for Multi-Route Apps (+ 3 Days)
+$249
Extended Report Pack (+ 10 Days)
+$129

Frequently asked questions

5.0
8 reviews
100% Complete
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)
1% Complete
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CG

Christian G.
5.00
May 21, 2026
Frontend / WebGL Engineer for High-Performance Simulation Dashboard Outstanding experience! Highly recommended!

JP

Jefferson P.
5.00
Jan 19, 2026
Developer: API Documentation

JB

James B.
5.00
Nov 27, 2025
Google Maps or Similiar Api Was great to deal with and kept making changes until he had it right.

Tf

Trustee f.
5.00
Sep 20, 2025
Compensation Great work. Thank you for being part of my project.

JP

Jefferson P.
5.00
Jun 5, 2025
Help us create a draft of API documentation
Arista I.Status: Offline

About Arista

Arista I.Status: Offline
Senior React Performance Engineer | AI-Generated SaaS Optimization
100% Job Success
5.0  (8 reviews)
Madiun, Indonesia - 5:20 pm local time
With 6+ years specializing in high-performance SaaS and Core Web Vitals, I fix what AI-generated code breaks.

The AI Performance Paradox: Many teams today ship AI-generated frontends (Cursor, v0, Copilot) that are functionally correct but fail Core Web Vitals. I audit and optimize these codebases to fix bundle bloat, layout instability, and main-thread bottlenecks, ensuring they meet Lighthouse 90+ and modern LCP/INP standards.

🏆 Real Outcomes I've Delivered:
> AI Code Performance Audits: Identify and fix Core Web Vitals regressions (LCP, INP, CLS) in AI-generated React apps — the silent performance killer affecting modern engineering teams.
> WebGL & Performance Engineering: Re-architected a complex simulation dashboard managing 7,000+ visual entities from severe UI lag. Delivered a seamless 60FPS experience and LCP under 2.5s.
> SaaS Cost Optimization: Optimized massive data scraping pipelines (Node.js/Python), reducing server infrastructure costs by 40% while maintaining enterprise-grade stability.
> Rapid API Migrations: Led an enterprise API documentation migration to Mintlify, cutting developer onboarding time by 50% (from 3 days to 1.5 days).

⚙️ My Core Engineering Pillars:
1. Web Performance & AI Audit: React, Next.js, TypeScript, WebGL. Optimized for Core Web Vitals performance and fast user experiences.
2. Backend & AI Integration: Node.js (Express/NestJS), Python, AWS Lambda, PostgreSQL, Redis, OpenAI/Claude APIs.

🗣 What Clients Say:
"Really solid freelancer, thanks for the fast turnaround time. Thank you!" - Jack
"Outstanding experience! Highly recommended!" - Christian

Stop paying for hours spent "figuring it out." Let's turn your technical bottlenecks into competitive advantages. Invite me to your job or shoot me a message!

Steps for completing your project

After purchasing the project, send requirements so Arista can start the project.

Delivery time starts when Arista receives requirements from you.

Arista works on your project following the steps below.

Revisions may occur after the delivery date.

Performance Audit & Bottleneck Analysis

I analyze your React or Next.js application using Lighthouse, React Profiler, and browser performance tools to identify Core Web Vitals issues, rendering bottlenecks, and bundle-size problems.

Optimization & Refactor

I implement the fixes: code splitting, dynamic imports, lazy loading, reducing unnecessary JavaScript, and resolving LCP/CLS issues through targeted rendering and bundle-level changes.

Review the work, release payment, and leave feedback to Arista.