I run Libcourse.com — a membership website selling online courses. I need an experienced web developer / front-end + performance specialist to modernize the site’s UI and optimize every aspect for the fastest possible loading and best user experience on both desktop and mobile. Scope (high level): Full site performance audit (Core Web Vitals, Lighthouse, GTmetrix or equivalent) and clear remediation plan. Front-end/UI refresh: modern, clean, course-platform look (landing, course list, lesson pages, login, account area, download button placement). Performance optimizations: image optimization, lazy loading, script bundling/minification, critical CSS, asset caching, HTTP/2 or HTTP/3 suggestions, remove render-blocking resources. Back-end / hosting recommendations & configuration: caching (page/server), CDN setup, HTTP headers, DB queries if needed. Fix UX issues for membership flows (login, signup, checkout, download button behavior) and ensure logical placement/visibility of key buttons (Download, Login/Logout, My Courses). Accessibility and mobile responsiveness checks and fixes. Basic QA & testing (desktop and mobile), before/after performance report and improvement metrics. Deliverables: Performance audit report with prioritized fixes and estimated hours/costs. Updated UI mockups or screenshots of main templates (home, course page, lesson page, account/login). Implemented performance improvements on a staging site (or during scheduled maintenance). Before / after performance screenshots and Lighthouse/Core Web Vitals report. Short documentation with steps performed, server/CDN/config changes, and how to maintain improvements. Optional: 30-day support window for small fixes after delivery. Success criteria / acceptance tests (examples): Significant improvement in page load metrics (example targets you can propose): LCP < 2.5s, FID/INP acceptable, CLS < 0.1 on mobile and desktop. (Contractor should propose realistic targets after audit.) Site loads noticeably faster on mobile with 3G/4G emulation. Download, login, and account flows work correctly; download button is visible & intuitive. No visual regressions; pages remain responsive. Platform / access: Site: Libcourse.com (I will provide admin access, FTP/SFTP, wp-admin or hosting panel, and staging info on agreement). Platform details: membership/course platform (please specify if you need any plugin details). (Contractor should state required access list in proposal.) Budget & timeline: Fixed-price project (I selected fixed price in the form). My initial budget range is USD 250–750. Please state realistic proposal and breakdown by milestone. Preferred timeline: ASAP. Please propose timeline in your bid (audit duration, implementation duration, testing).