Mansoor Ul Hassan

Senior Shopify Full-Stack Developer with 4+ years of experience building custom Shopify, Shopify Plus, and WordPress solutions for clients across the United States, United Kingdom, Germany, and Pakistan. Proven track record across 50+ e-commerce projects, with deep expertise in scalable storefront architecture, third-party API integrations, Core Web Vitals optimization, and conversion rate improvement. Skilled in Shopify Liquid, React.js, Node.js, GraphQL, REST APIs, and modern front-end engineering practices.

Senior Shopify Developer - Devminds Studio - United States | Remote

(2024-06 - 2026-06)

• Spearheaded Shopify and WordPress delivery for 15+ international brands, achieving measurable gains in conversion rates across all storefronts.
• Designed custom Shopify themes and a library of 30+ reusable storefront components, cutting new-project setup time by approximately 40%.
• Incorporated 20+ third-party apps, APIs, and payment gateways — including Stripe, Klaviyo, and ReCharge — to extend platform functionality.
• Boosted Core Web Vitals scores by an average of 25 points (LCP, CLS, FID) and lifted organic search rankings through targeted SEO improvements.
• Partnered with stakeholders and designers to launch 10+ conversion-focused stores on schedule, consistently hitting agreed go-live dates.

Shopify Developer - venturestream - United Kingdom | Remote

(2023-06 - 2024-05)

• Built and maintained 10+ Shopify storefronts serving thousands of daily users, maintaining 99.9% uptime across all client properties.
• Crafted custom WordPress themes and plugins for 5+ clients, eliminating dependency on paid third-party tools and saving an estimated $500/month per site.
• Deployed advanced search, filtering, and merchandising features that increased average session depth by 20% across tested storefronts.
• Enhanced website responsiveness and mobile UX, achieving a 15% rise in mobile conversion rates for key client accounts.
• Resolved 100+ front-end, theme, and integration issues, cutting the open bug count by 60% within the first quarter.

Shopify Developer - Apex CRO - Germany | Remote

(2022-02 - 2023-05)

• Developed custom Shopify themes for 8+ global e-commerce brands handling high-traffic volumes of 50,000+ monthly visitors.
• Designed and shipped custom sections, templates, and product page experiences that lifted product page conversion rates by up to 18%.
• Created accessible, responsive interfaces following WCAG 2.1 standards, expanding reach to a broader user base.
• Accelerated storefront speed and front-end performance, raising average Lighthouse performance scores from 55 to 85+ across client sites.
• Upheld code quality standards and platform stability through peer reviews and documentation, reducing post-launch defects by 30%.

Junior Shopify Developer - Maftech UK - Lahore, Pakistan | On-site

(2021-10 - 2022-01)

• Customized 5+ Shopify themes using Liquid, HTML5, CSS3, and JavaScript, meeting all client design specifications on schedule.
• Drove integration of 8+ Shopify apps and custom features, freeing senior developers to focus on higher-priority work by leading end-to-end testing.
• Conducted QA testing and debugging across 3 major browsers, reducing reported post-launch defects by 25% per project.
• Improved responsive design and front-end performance of 4 existing storefronts, lowering average page load time by 1.2 seconds.
• Maintained a 100% on-schedule delivery record across all 5 client engagements.

Bachelor of Science - Computer Science (BSCS) - Virtual University Of Pakistan (2019-09 - 2023-06)