You will get React & Next.js Production Readiness & Performance Rescue
Top Rated

Project details
Built fast with Cursor, v0, Lovable, Copilot, or AI-assisted coding, but now your React/Next.js SaaS feels slow on real devices?
I help SaaS founders, AI builders, and agencies make React/Next.js products production-ready by finding real browser bottlenecks, prioritizing high-impact fixes, and validating results with Core Web Vitals, Lighthouse, PageSpeed, DevTools, and mobile checks.
I diagnose and improve:
• Slow LCP: hero/content loads too late
• Poor INP: clicks, typing, filters, or dashboard actions feel delayed
• CLS from images, fonts, or dynamic content
• Oversized JavaScript bundles
• Wasted React re-renders, heavy components, and hydration cost
• Slow mobile UX and AI-generated frontend debt
Depending on the tier, you may receive:
• Audit for 1 page or critical flow
• CWV diagnosis: LCP, INP, CLS
• DevTools profiling notes
• Prioritized fix roadmap
• Loom walkthrough
• Reviewable PRs and before/after validation for implementation tiers
Recent case: optimized a React/Next.js WebGL dashboard rendering 7,000+ entities by resolving worker bottlenecks, memory/GC churn, rendering traps, and mobile issues.
Not sure which tier fits? Send your URL, and I'll recommend honestly
I help SaaS founders, AI builders, and agencies make React/Next.js products production-ready by finding real browser bottlenecks, prioritizing high-impact fixes, and validating results with Core Web Vitals, Lighthouse, PageSpeed, DevTools, and mobile checks.
I diagnose and improve:
• Slow LCP: hero/content loads too late
• Poor INP: clicks, typing, filters, or dashboard actions feel delayed
• CLS from images, fonts, or dynamic content
• Oversized JavaScript bundles
• Wasted React re-renders, heavy components, and hydration cost
• Slow mobile UX and AI-generated frontend debt
Depending on the tier, you may receive:
• Audit for 1 page or critical flow
• CWV diagnosis: LCP, INP, CLS
• DevTools profiling notes
• Prioritized fix roadmap
• Loom walkthrough
• Reviewable PRs and before/after validation for implementation tiers
Recent case: optimized a React/Next.js WebGL dashboard rendering 7,000+ entities by resolving worker bottlenecks, memory/GC churn, rendering traps, and mobile issues.
Not sure which tier fits? Send your URL, and I'll recommend honestly
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance OptimizationWhat's included
| Service Tiers |
Starter
$349
|
Standard
$949
|
Advanced
$2,199
|
|---|---|---|---|
| Delivery Time | 3 days | 5 days | 10 days |
Number of Revisions | 2 | 4 | 8 |
Number of Pages | 1 | 5 | 7 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
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)
+$129Frequently asked questions
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CG
Christian G.
May 21, 2026
Frontend / WebGL Engineer for High-Performance Simulation Dashboard
Outstanding experience! Highly recommended!
JP
Jefferson P.
Jan 19, 2026
Developer: API Documentation
JB
James B.
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.
Sep 20, 2025
Compensation
Great work. Thank you for being part of my project.
JP
Jefferson P.
Jun 5, 2025
Help us create a draft of API documentation
About Arista
React & Next.js Production Readiness & Performance Rescue
91%
Job Success
Madiun, Indonesia - 1:16 am local time
The AI Performance Paradox: code from Cursor, v0, or Copilot runs, but it ships with oversized bundles, layout shift, and main-thread blocks that wreck LCP, INP, and CLS. I audit that code and fix it at the architecture level, not with vanity tricks.
Real outcomes I've delivered:
1. Rendering at scale — re-architected a simulation dashboard handling 7,000+ visual entities from severe lag to a smooth 60FPS with LCP under 2.5s.
2. Mobile Core Web Vitals — eliminated main-thread bottlenecks on a high-volume agritech SaaS, holding Lighthouse 90+ even under heavy data rendering.
3. Speed that cuts cost — optimized Node.js/Python pipelines to drop server infrastructure costs 4. 40% while keeping enterprise-grade stability.
I optimize against real Google CrUX field data — what your actual users experience — not cached lab scores that look great and change nothing. If you've been burned by a "99 PageSpeed" that never moved your traffic, that's exactly the gap I close.
Backed by a 100% Job Success, Top Rated record across 12 projects — "Outstanding experience! Highly recommended!"
Want to know what's slowing you down? Invite me with your URL or Search Console access, and I'll send back a short Loom diagnosing your worst paint-cycle offenders, then a fixed-price plan to get you green.
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.
Requirements & Access Review
I review your URL, target page or flow, current performance concerns, tech stack, and access requirements. For implementation tiers, I also confirm the repo, branch, and PR workflow before making changes.
Performance Audit & Bottleneck Analysis
I analyze your React/Next.js application using Lighthouse, PageSpeed, Chrome DevTools, React profiling, and browser performance tools to identify Core Web Vitals issues, rendering bottlenecks, hydration cost, JavaScript weight, and mobile UX problems
