Load Time Rescue & CRO Optimization for Mugensense

Mugensense is a Direct-to-Consumer (DTC) e-commerce brand selling custom anime-inspired luxury jewelry. The brand attracted high organic and social media interest, but its storefront suffered from severe technical degradation that frustrated potential buyers and suppressed conversion rates.

• $6K/month → $17K/month revenue growth during technical engagement • 30+ seconds → 1.2 Seconds dramatic reduction in page load speed • Improvement in PageSpeed Insights mobile performance score • Streamlined cart-to-checkout flow built specifically for mobile buyers • Eliminated technical debt by removing redundant tracking scripts and uninstalled app artifacts

Lead Shopify Performance Engineer & Conversion Rate Optimization (CRO) Specialist Responsibilities: Technical theme code cleanup, page speed optimization, Core Web Vitals remediation, storefront UX overhaul, cart/checkout friction reduction, and ongoing architecture scaling support.

The site suffered from severe performance drag, taking over 30 seconds to load on mobile connections due to unoptimized assets, unmanaged tracking scripts, and legacy code left behind by deleted apps. This latency resulted in high bounce rates, low mobile conversion, and lost advertising spend. The client needed a complete technical rescue without breaking existing design elements or downtime during active ad campaigns.

• Performance Engineering: Full codebase audit, Liquid optimization, removal of uninstalled app script bloat, lazy-loading implementation, and asset compression. • User Experience & CRO: Mobile-first navigation restructuring, product media gallery stabilization, sticky add-to-cart interactions, and trust badge layout design. • Checkout & Cart Optimization: Rebuilding the cart drawer to show transparent shipping thresholds, urgency indicators, and clean upsell logic. • Long-Term Scaling Support: Iterative theme updates, catalog structure maintenance, and conversion testing as store traffic scaled.

• Theme Code Refactoring: Hand-audited the theme's .liquid templates, stripping out legacy JavaScript libraries and unused CSS stylesheets. • Script Management: Deferred non-critical third-party scripts (pixels, analytics, review widgets) to load after primary document rendering, preventing render-blocking behavior. • Core Web Vitals Tuning: Fixed Cumulative Layout Shift (CLS) on product pages by assigning explicit image and video dimension attributes; optimized Largest Contentful Paint (LCP) by preloading primary product media assets. • Custom Mobile UX: Re-engineered the mobile navigation and product detail page (PDP) layout using lightweight CSS/vanilla JS to keep interactive components under 5KB.

• 30+ second mobile load time → [VERIFY METRIC: Insert post-optimization load time in seconds via PSI / GTmetrix] • $6K/month baseline revenue → $17K/month monthly revenue during optimization engagement • Bloated, script-heavy theme → Clean, lean Liquid code architecture • High bounce rates on product pages → Fast, frictionless mobile browsing experience

By eliminating load latency and friction in the buyer journey, Mugensense retained significantly more mobile ad traffic. During the course of these performance optimizations, UX refinements, and technical upgrades, the store's monthly revenue scaled from ~$6K to ~$17K.

This Project proves I can step into a technically degraded Shopify environment, identify performance bottlenecks, and systematically optimize code to drive business growth. I do not rely on automated speed apps; I refactor code by hand to deliver lasting Core Web Vitals improvements.

• Shopify Liquid & Theme Refactoring • Core Web Vitals Optimization (LCP, CLS, INP) • JavaScript / CSS Performance Engineering • Mobile Conversion Rate Optimization (CRO) • Cart Drawer & PDP UX Architecture