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SK MOHOTASIN B.
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SK MOHOTASIN B.

Shopify Front-End Developer | Theme Speed Optimization

10+ years building and refining Shopify storefronts — from ground-up custom themes to surgical fixes on live stores generating serious revenue. I work across the full front-end stack: Liquid, HTML, CSS, JavaScript, jQuery, and AJAX — whatever it takes to make your storefront fast, clean, and conversion-ready. Whether you need a custom theme built from scratch, an existing theme rescued from messy AI-generated code, or a store that scores green on Core Web Vitals, this is what I do every day. No guesswork. No overcomplication. Just clean, maintainable theme work delivered on time. What I can do for your store: → Custom Shopify theme development (OS 2.0 sections, blocks, templates) → Theme speed optimization — real-world performance, not just PageSpeed scores → App and API integration on the front end → Customer events, Web Pixels, and GA4/tracking setup → On-page SEO aligned with your theme structure → Refactoring legacy, bloated, or AI-generated Liquid code → PageFly, Klaviyo, Seal Subscriptions, and third-party app wiring → B2B/wholesale and subscription funnel builds → Direct-to-checkout flows and conversion-focused UX How I work: Send the store URL, what needs fixing or building, and your timeline. You get back a clear plan and honest estimate — fast. I keep communication simple and turnaround tight, and I work well with both solo merchants and agency teams. If you want a developer who takes ownership and delivers clean work — let's talk.

🇧🇩Satkhira, Bangladesh$20/hr100% JSS4.92 (25)Since Jun 2014

Earnings and projects

MRR
$106

Last 6 months ÷ 6

World#133,410 / 412k
🇧🇩Country#4,398 / 15.0k
Revenue, last 30 days
$179

Last 6 months: $634

World#84,049 / 412k
🇧🇩Country#2,725 / 15.0k
Total earnings
$43k

Billed in all: $44k

World#85,743 / 412k
🇧🇩Country#2,422 / 15.0k
Per project
$1.2k

$211 in the last 6 months

World#108,712 / 412k
🇧🇩Country#1,728 / 15.0k
Projects, last 6 months
3

Across 5 contracts

0% fixed100% hourly
World#66,479 / 412k
🇧🇩Country#3,482 / 15.0k
Projects in all
35

Across 49 contracts

39% fixed61% hourly
World#85,277 / 412k
🇧🇩Country#6,094 / 15.0k

Earnings, last 30 days

$43.9k+$179 earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$43.7k$43.8k$43.9k$44.0kOct 8Oct 23Nov 7

Skill rankings: Top 20% in AJAX

Ranked by MRR among everyone on Upwork with the skill.

  1. #392AJAX2,006 freelancers · 🇧🇩 #22Top 20%
  2. #819Liquid1,844 freelancers · 🇧🇩 #32Top 44%
  3. #854Google Search Console1,908 freelancers · 🇧🇩 #65Top 45%
  4. #1,353Page Speed Optimization3,190 freelancers · 🇧🇩 #134Top 42%
  5. #1,356Shopify Plus3,236 freelancers · 🇧🇩 #50Top 42%
  6. #1,386Shopify Templates3,688 freelancers · 🇧🇩 #64Top 38%
  7. #1,815Shopify Theme4,613 freelancers · 🇧🇩 #76Top 39%
  8. #1,875jQuery8,973 freelancers · 🇧🇩 #85Top 21%