Next.js Developer for Mobile Performance Optimization

₹600-1500 INR

Completed

Posted 7 days ago

₹600-1500 INR

Paid on delivery

Title: [login to view URL] + Sanity Expert Needed to Improve Mobile LCP & PageSpeed Performance We are looking for an experienced [login to view URL] and Sanity CMS developer with proven expertise in Core Web Vitals and Google PageSpeed Insights optimization. Project Details Our website is built with [login to view URL] and Sanity CMS. We are experiencing poor Largest Contentful Paint (LCP) performance on mobile product pages. Current metrics: Mobile LCP: ~4.4 seconds Mobile Performance Score: ~85 Desktop Performance: Good (no major issues) Goals Reduce Largest Contentful Paint (LCP) to 2 seconds or less on mobile. Improve Mobile Performance Score to 90+. Optimize without breaking functionality, SEO, or user experience. Requirements Strong experience with [login to view URL] performance optimization. Experience working with Sanity CMS. Deep understanding of Core Web Vitals, especially Largest Contentful Paint (LCP). Expertise with Google PageSpeed Insights, Lighthouse, and Chrome DevTools performance analysis. Ability to identify the root cause of slow LCP and implement effective optimizations. When Applying Please include: Examples of similar performance optimization projects you have completed. The improvements you achieved (LCP, PageSpeed score, Core Web Vitals, etc.). A brief explanation of your approach to diagnosing and fixing LCP issues in a [login to view URL] application. Please apply only if you have proven experience optimizing [login to view URL] applications for Core Web Vitals and mobile performance.

Next.js

Google PageSpeed Insights

Project ID: 40572857

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Active 6 days ago

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Awarded to:

@richard031596

Mobile LCP of 4.4 seconds on product pages with a [login to view URL] + Sanity stack almost always comes down to one of three root causes: unoptimized hero/product images served without proper sizing or next/image priority hints, render-blocking Sanity content fetches delaying the above-the-fold element, or third-party scripts (analytics, chat widgets) loading synchronously on mobile. I've diagnosed and fixed exactly this pattern on [login to view URL] sites — bringing mobile LCP from 4-5 seconds to under 2 seconds through priority image preloading, Sanity image URL builder with responsive srcsets, and deferred non-critical scripts. My diagnostic approach: Chrome DevTools waterfall to identify what element is the LCP candidate and what's blocking it, then Lighthouse trace to confirm. Common fixes for your setup: priority prop on the LCP image, sizes attribute matching actual mobile viewport render size, Sanity CDN image transformation for WebP + correct dimensions, and moving any blocking third-party scripts to next/script with strategy="lazyOnload". Can you share the site URL so I can run a Lighthouse trace and identify the exact LCP element before proposing a fix?

₹3,000 INR in 2 days

5.0

(2 reviews)

1.0

55 freelancers are bidding on average ₹3,843 INR for this job

@Mayanks010

Hi, Thanks for sharing your project. It aligns well with work I’ve successfully completed for other clients, and I’m confident I can deliver a high-quality solution tailored to your requirements. Before providing an accurate timeline, scope, and budget, I’d like to clarify a few key details to ensure we're aligned from the start. Freelancer’s proposal character limit makes it difficult to cover everything thoroughly here. If you're available, let's connect via chat. I can walk you through similar projects I've completed, discuss the best approach for your specific requirements, and answer any questions you may have. Once I understand your expectations, I'll provide a clear execution plan with realistic timelines and pricing. I’m ready to get started as soon as we finalize the details and look forward to working with you. Best regards, Mayank Sahu

₹1,050 INR in 7 days

4.6

(17 reviews)

3.9

@narendras017

Hi, I am a professional Digital Marketing & Web Development Specialist with 2.5+ years of experience helping businesses establish a strong online presence and generate more leads. My Services: ✔ Website Design & Development ✔ WordPress ,Shopify Website Development ✔ PHP & HTML Development ✔ Responsive Web Design ✔ WordPress Multilingual Setup ✔ Web Hosting & Domain Management ✔ Website Maintenance & Support ✔ SEO Optimization & Performance Enhancement Why Choose Me? ✅ Professional & Modern Designs ✅ Mobile-Friendly Websites ✅ Fast Loading Speed ✅ SEO-Friendly Structure ✅ Transparent Communication ✅ Timely Project Delivery I focus on creating websites that not only look great but also help businesses attract customers and grow online. Let's discuss your project and build a powerful online presence for your business. Best Regards

₹1,050 INR in 7 days

0.0

(0 reviews)

0.0

@rohitv622

Hello, I am a B.Sc. IT graduate with skills in Java, Python, SQL, HTML, CSS, and JavaScript. While I am new to PHP and Laravel, I am a quick learner and committed to delivering quality work. I would appreciate the opportunity to work with you and will communicate regularly throughout the project. Thank you for your consideration.

₹1,050 INR in 7 days