Manish M.

I build, migrate and connect ecommerce stores on BigCommerce, Shopify and Shopware, and I develop the custom applications, integrations and automations that keep them running with less manual work. Top Rated on Upwork with 21,000+ hours and 12+ years of ecommerce experience. BigCommerce Stencil theme development and customization, Page Builder widgets and reusable templates Product page customization, bulk add-to-cart, B2B pricing, price lists and customer groups Multi-storefront setups, catalog restructuring, checkout customization and app setup Speed, SEO and conversion improvements on live stores Shopify and Shopify Plus Custom theme development, Online Store 2.0 sections, metafields and product configurators B2B and wholesale setups, bundles, subscriptions and pre-orders Cleaning up app-heavy stores by moving features into the theme and improving page speed Shopware 5 and 6 Plugin and theme development, Shopping Experiences, B2B features Version upgrades, Shopware 5 to 6 migrations and long-term maintenance Migrations I move stores between platforms without losing products, customers, orders or search rankings: full data migration, URL redirect mapping, SEO preservation and careful launch testing. Recent work includes BigCommerce to Shopify migrations, plus migrations from Magento, WooCommerce, PrestaShop and Turbify. Integrations I connect stores with the systems a business already runs on: ERP and CRM (including Salesforce), inventory and PIM tools, shipping, tax, payment, email marketing and reviews platforms. I build these with proper logging and error alerts, so issues get caught early instead of piling up quietly. Automation Google Sheets to BigCommerce sync that matches products by SKU, updates stock and creates missing products automatically Daily blog automation that reads a store’s products and categories, then writes and publishes a new article with an AI-generated image every day BigCommerce to Salesforce sync that pushes every new order and customer into Salesforce Workflows built with n8n, Zapier, Make, webhooks or custom code, depending on what fits best Custom Applications When a platform can’t do what you need, I build custom web applications and middleware with Laravel, React and Node.js: portals, dashboards, configurators and the services that connect them. Magento and Other Platforms I have held my Magento certification for over 8 years and completed 280+ Magento 1 and 2 projects on Upwork, including custom themes and extensions, Hyvä, upgrades and Magento 1 to 2 migrations. I also work with WooCommerce, PrestaShop and CodeIgniter. How I Work 1. I review your store and requirements before quoting, so estimates are realistic 2. I test changes on staging before they go live 3. I follow coding standards and check my work before delivery 4. I send clear written updates and flag problems early, with a suggested fix 5. I am comfortable with Git, pull requests and tools like Linear, Jira and ClickUp Many of my clients have worked with me for years on ongoing support and new projects. If you need someone who understands both the code and the business side of ecommerce, send me a message about your project.