Rejaul Karim

Hi, I'm Rejaul Karim

Shopify Developer & Educator

I'm a passionate Shopify developer with 5+ years of experience building custom themes, apps, and integrations for e-commerce businesses worldwide. I started this blog to share what I've learned — in both English and Bangla — so more developers can benefit.

What I Work With

Shopify LiquidTheme DevelopmentShopify CLIDawn ThemeCustom SectionsApp DevelopmentNode.jsReactREST APIGraphQLJavaScriptTypeScriptCSS / SASSPerformance OptimizationGitNetlify

What I Offer

Theme Customization

Your store should look like you — not a free template. I customize Shopify themes at the code level so your brand stands out and buyers trust you instantly.

Conversion Rate Optimization

The same traffic. More revenue. I find the exact friction points killing your conversions — product page, checkout, mobile — and eliminate them with data, not guesswork.

Speed Optimization

A 1-second delay costs you 7% in sales. I bring Shopify stores to sub-2s load times and 90+ PageSpeed — which also means better Google rankings.

Bug Fixing & Support

Every hour a bug is live, it's costing you money. I diagnose and fix Shopify bugs, broken layouts, and app conflicts — usually within 24 hours.

Why This Blog?

When I started learning Shopify, most tutorials were in English and often assumed a high level of prior knowledge. I struggled to find beginner-friendly, practical content — especially in Bangla.

That's why I created this blog: to provide clear, practical, and honest Shopify content for developers and store owners at every skill level — in both English and Bangla.

My goal is to help 10,000+ people launch and grow successful Shopify businesses by 2026.