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Front-End Developer · Shopify Specialist · UI Developer

Sajal Ghosh

Front-End Developer specializing in Shopify, Shopify Plus and high-performance eCommerce experiences.

Senior Front-End & Shopify Developer

I turn complex eCommerce ideas into clean, fast digital experiences.

15+ years of front-end development, with a focus on Shopify, Shopify Plus, UI systems, performance and conversion.

15+ years of front-end experience with a Shopify-first approach — from Figma-to-code and custom theme development to performance, accessibility and conversion-focused eCommerce UX.

Available for selected projects
Shopify · UI systems · CRO · Performance · AI-assisted development
15+Years in front-end & UI development
ShopifyTheme development & Shopify Plus
90K+Upwork earnings
100%Job Success Score

Recent work

A selection of eCommerce builds focused on strong visual systems, custom Shopify functionality, mobile UX and measurable business goals.

Lilac St.

Beauty/Cosmetics eCommerce
01

Worked on the store from its early Debut theme stage through advanced theme customization and development, building a highly tailored Shopify experience. Focused on CRO, technical SEO, mobile UX and performance, while developing custom features such as a Build-a-Box experience without relying on an app. Also handled reusable components, custom product/collection experiences, third-party integrations and a wide range of bespoke Shopify functionality.

Shopify 2.0Shopify plusPerformanceMobile UXGSAP

Alkaline Herb Shop

Shopify eCommerce
02

Shopify Plus development focused on advanced theme customization and Checkout Extensibility, along with CRO, technical SEO and blog optimization. Improved storefront speed and performance while reducing dependency on third-party apps by replacing app-based functionality with custom Shopify solutions and scalable front-end features.

ShopifyLiquidCustom SectionsCROtechnical seosubscription feature

Amy Cosmetics

Beauty/Cosmetics eCommerce
03

Custom Shopify theme development and front-end customization focused on CRO, mobile UX and performance optimization. Built custom product and merchandising features, optimized the shopping journey and reduced reliance on third-party apps through tailored Shopify solutions. Also worked on technical SEO, reusable components and ongoing storefront enhancements.

Shopify 2.0Figma to ShopifyJavaScriptResponsive UX

Cleoharper

Activewear
04

A long-term Shopify development partnership spanning 4–5 years, including migrating the store from a heavy theme to a lightweight, performance-focused theme to improve speed and conversion. Extensive work across Liquid, JavaScript and CSS, along with custom offers, merchandising features and app-free functionality. Continuously optimized the storefront for performance, UX and conversion.

Theme CustomizationLiquidCSSUX

Case studies

How I approach a storefront from problem definition through implementation and refinement.

Case study 01 · Shopify rebuild

Turning a standard theme into a flexible storefront system.

The goal was to move beyond one-off edits and create a scalable set of sections and components that the merchant could reuse across landing pages, collections and product experiences.

ChallengeRigid layouts, inconsistent content patterns and limited merchandising flexibility.
ApproachBuilt reusable Liquid sections, blocks, responsive components and configurable theme settings.
Technical workShopify 2.0, Liquid, JSON templates, metafields/metaobjects, JavaScript and CSS/SCSS.
OutcomeA more maintainable storefront with faster content iteration and stronger consistency across pages.
Case study 02 · Performance & UX

Improving the experience without losing the visual ambition.

Rich eCommerce interfaces often depend on animation, third-party apps and large media. The work focused on preserving the design while reducing unnecessary front-end cost.

ChallengeHeavy assets, third-party scripts and interaction layers affecting perceived performance.
ApproachReviewed loading order, deferred non-critical assets, optimized components and simplified expensive interactions.
UX focusMobile-first layouts, clear product hierarchy, accessible interactions and smooth navigation.
OutcomeA cleaner front-end architecture designed to balance brand expression, usability and performance.
Case study 03 · Custom commerce

Designing functionality around the actual buying journey.

Custom Shopify work frequently requires more than styling. Cart logic, product personalization, bundles, recommendations and dynamic content all need to work together without creating friction.

ChallengeComplex product and cart requirements that standard theme behaviour could not handle cleanly.
ApproachConnected Liquid data, JavaScript interactions, Shopify APIs and configurable theme settings.
ArchitectureReusable modules instead of page-specific hacks, making future changes easier to maintain.
OutcomeA storefront experience shaped around the merchant's business rules and customer journey.
CRO / Shopify optimization

From more clicks to more completed purchases.

A portfolio-ready view of how CRO work can be presented: establish a baseline, test UX improvements, and track conversion rate over time.

1% 2% 3% 4% 5% Baseline UX changes Testing Optimized 3.8% 2.1%
Conversion rate2.1% → 3.8%before / after
Relative uplift+81%calculation
Focus areasUX + PDP + CartProduct discovery, trust, checkout friction

Client testimonials

Feedback from clients and teams I’ve worked with across Shopify, UI development and eCommerce projects.

“
Sajal did an amazing job designing our website on the Shopify Impulse theme. From start to finish, the process was professional, efficient, and detail-oriented. The final website looks modern, clean, and highly functional, with excellent attention to user experience and visual presentation.
C
Caleb QAdore hair extensions
“
Sajal is an exceptional Shopify Liquid expert whose technical skills are matched only by his profound integrity. Throughout our project, he delivered clean, high-quality code and demonstrated outstanding professionalism, even when faced with unforeseen project changes on my end.
A
Alex zengCustom Shopify development
“
Amazing work from We have been working for the last year with Sajal in different projects and couldn't recommend him more. He is super fast and understands perfectly what we need at every moment. Will definitely work with him in the near future again
T
TyreeUX & CRO project
All testimonials are from upwork
AI-assisted development

Using AI to build faster — without lowering the quality bar.

I use AI as a development accelerator, not as a replacement for engineering judgment. It helps me move faster through repetitive work, explore solutions and validate ideas, while I remain responsible for architecture, code quality, accessibility, performance and the final implementation.

Code generationDebuggingRefactoringLiquid assistanceUX explorationDocumentation
01 · Faster first draftsGenerate boilerplate, Liquid structures, JavaScript patterns and CSS starting points quickly, then review and refine them.
02 · Faster debuggingUse AI to inspect errors, explain unfamiliar code and explore multiple fixes before selecting the cleanest solution.
03 · Smarter Shopify workflowsSpeed up theme-section development, metafield/metaobject logic, API work and repetitive storefront tasks.
04 · Human-led quality controlEvery AI-assisted output is reviewed for maintainability, security, accessibility, responsive behaviour and Shopify best practices.
About

Front-end craft meets commerce thinking.

I’m a Front-End / Lead UI Developer specializing in Shopify and Shopify Plus. I work across design implementation, theme architecture, custom sections, JavaScript interactions, accessibility, performance and eCommerce UX.

My focus is building interfaces that are visually accurate, technically maintainable and practical for the teams managing the store after launch.

Build thoughtfully. Ship confidently.
ShopifyShopify PlusLiquidJavaScriptHTMLCSS / SCSSFigmaGSAPWordPressWebflowAccessibilityPerformance
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