sanket.k
Sanket KumbhaniSurat, IndiaShopify App & Backend Developer

Shopify apps,
built from the API up.

Nearly five years in web development, four and a half of them on Shopify. I write apps on Node.js, TypeScript and GraphQL: Shopify Functions, sales channel integrations, admin tools in Polaris, and the backend work that holds them together. Right now that's VegaCart, a mobile app builder at Crawlapps.

See the work LinkedIn
POST /admin/api/graphql.json
Query

          
Response200 OK

        

        

          

            cost 0
            
            1000/1000
          

          
        

      

    

  


  

    

      
4.5yrsbuilding on Shopify, of ~5 in web development

      
5+custom Shopify apps architected and shipped

      
50+merchant stores running those apps

      
10k+OTP transactions a day through Authyo

    

  


  

    

      

        

          Oct 2025 · present
          
Turning Shopify stores into native apps at Crawlapps.

          
Shopify App Developer · VegaCart Mobile App Builder

          
VegaCart converts a Shopify store into a Flutter-based native app. My side of it is the Shopify-integrated features, real-time store data sync, and keeping the backend scalable as merchant workflows get more involved.

        

        
    
          
  • functionsShopify Functions with custom discount logic for complex merchant requirements
    • 
          
  • backendReworked the app architecture on Node.js, TypeScript and GraphQL so it's easier to scale and maintain
    • 
          
  • channelsSales channel integrations and backend improvements that merchants actually feel
    • 
          
  • integrationsReusable integrations and tighter API workflows, so features behave consistently
    • 
        

      

    

  


  

    

      

        // selected work
        
Things I've built that merchants use.

      


      

        

          
AuthyoOTP Login & RegisterShopify app

          

            
Passwordless login for Shopify storefronts

            
Email and SMS one-time passwords on a custom Node.js backend. Real-time input validation and clear error handling pushed registration completion up by 25%.

            
Node.jsShopify AppEmail OTPSMS OTP

          

          
10,000+OTP transactions per day

        


        

          
Rootways Wishlistfor Rootways Inc., CanadaShopify App Store

          

            
Wishlist and save-for-later, live on the App Store

            
Guest and customer wishlists, multiple shareable lists, theme integration, and automated reminder emails sent through Brevo.

            
Shopify AppTheme integrationBrevoNode.js

          

          
Livepublic listing on the Shopify App Store

        


        

          
Mobile App Build SystemFlutter merchant appsPolaris admin

          

            
One admin screen to configure a Flutter build

            
A Polaris admin for setting up Flutter merchant apps. Node.js and Express generate the pubspec automatically, so nobody hand-edits build config per merchant.

            
PolarisNode.jsExpressFlutter

          

          
~70%less setup time per app

        


        

          
RavelCare.comTheme workat Codify Infotech

          

            
A guided product quiz that sells the next item

            
Built the quiz into the theme, plus "Random Products on Refresh" and "Browser History" features. Theme performance work in Liquid, JavaScript and React cut bounce rate by 15%.

            
LiquidJavaScriptReactOnline Store 2.0

          

          
+22%upsells from the quiz · return visits up 18%

        

      

      See how the systems behind this work fit togetherInteractive diagrams →
    

  


  

    

      

        // experience
        
From themes to apps to the backend.

      

      
    
        
  1. 
          
    Oct 2025 – PresentSurat, India
    
          
    
            
    Crawlapps · Shopify App Developer
    
            
      
              
    • Develop and extend the VegaCart Mobile App Builder, which converts Shopify stores into Flutter-based native apps.
      • 
              
    • Implemented Shopify Functions, including custom discount logic.
      • 
              
    • Improved the app architecture with Node.js, TypeScript and GraphQL.
      • 
              
    • Contributed to sales channel integrations and backend enhancements.
      • 
            
    
          
    
        
    2. 
        
  2. 
          
    Aug 2023 – Sep 2025Ahmedabad, India
    
          
    
            
    XillenTech · Shopify App & Theme Developer, MERN Stack
    
            
      
              
    • Architected and deployed 5+ custom Shopify apps used across 50+ merchant stores.
      • 
              
    • Worked on MobiVogue, a public Shopify app that turns merchant stores into mobile apps.
      • 
              
    • Integrated the Admin API, GraphQL and App Bridge for in-admin store management tools.
      • 
            
    
          
    
        
    3. 
        
  3. 
          
    Jun 2022 – Jul 2023Surat, India
    
          
    
            
    Codify Infotech · Shopify Theme Developer
    
            
      
              
    • Built a guided product quiz for RavelCare.com that increased upsells by 22%.
      • 
              
    • Shipped "Random Products on Refresh" and "Browser History" features; return visits up 18%.
      • 
              
    • Optimised themes with Liquid, JavaScript and React; bounce rate down 15%.
      • 
            
    
          
    
        
    4. 
        
  4. 
          
    Jan 2022 – Apr 2022Ahmedabad, India
    
          
    
            
    Code Quality Technologies LLP · ReactJS Developer
    
            
      
              
    • Built responsive React apps with reusable components and hooks, including a weather app on real-time API data.
      • 
            
    
          
    
        
    5. 
      

    

  


  

    

      

        // stack
        
What I reach for.

      

      

        

          
Shopify platform primary

          
Where most of my hours go. Apps, extensions, and the APIs underneath them.

          
Shopify FunctionsAdmin API · GraphQLAdmin API · RESTSales channelsApp BridgePolarisApp extensionsShopify CLIOnline Store 2.0Liquid

        

        

          
Backend & APIs

          
REST and GraphQL API design, reusable third-party integrations.

          
Node.jsTypeScriptExpress.jsGraphQLMongoDBMySQL

        

        

          
Frontend

          
Admin UIs and storefront features.

          
ReactNext.jsJavaScriptTailwind CSSPolaris

        

        

          
Mobile app builders

          
The pipeline that turns a store into a Flutter app.

          
Flutter build configpubspec generationReal-time store sync

        

        

          
Deploy & tooling

          
Getting it to production and keeping it there.

          
DockerCI/CDDigitalOceanGitGitHub

        

      


      

        
Education
B.Sc. Computer Applications & Information Technology
K. S. School of Business Management, Gujarat University · 2019–2022

        
Certifications · Anthropic · Mar 2026
Claude Code in Action
AI Fluency: Framework & Foundations

      

    

  


  

    

      // contact
      
Got a Shopify app to build? Let's talk.

      

        
sanketkumbhani0@gmail.com

        LinkedIn