Big Commerce - Software Engineer

BigCommerce Engineer
About the Role We're looking for an experienced BigCommerce Engineer to design, build, and maintain our ecommerce storefront and its supporting integrations. You'll work at the intersection of frontend storefront development, backend API integrations, and platform architecture to deliver a fast, reliable, and conversion-focused shopping experience. What You'll Do * Develop and maintain custom storefronts using BigCommerce's Stencil framework (Handlebars, SCSS, JavaScript) * Build and extend features using the BigCommerce Storefront API, Catalog API, and Checkout * Integrate BigCommerce with third-party systems (ERP, CRM, PIM, OMS, payment gateways, tax engines, shipping providers) via REST/GraphQL APIs * Customize checkout flows, cart logic, and post-purchase experiences * Build and maintain BigCommerce apps or private apps using webhooks, scripts, and the App Marketplace framework where needed * Optimize site performance, Core Web Vitals, and mobile responsiveness * Collaborate with designers, product managers, and merchandising teams to translate requirements into technical solutions * Troubleshoot production issues across storefront, backend integrations, and third-party services * Write clean, tested, well-documented code and participate in code reviews * Stay current with BigCommerce platform updates, API changes, and ecommerce best practices Required Qualifications * 3+ years of experience building and customizing BigCommerce storefronts (custom development) * Experience with developing microservices using Kotlin , following a Test Driven Development approach * Hands-on experience with BigCommerce's REST and GraphQL APIs (Catalog, Orders, Customers, Checkout) * Experience integrating BigCommerce with external systems (ERP, CRM, marketing platforms, payment/shipping providers) * Solid understanding of ecommerce concepts: cart/checkout flow, product catalog structure, pricing rules, promotions, and order lifecycle * Familiarity with headless/composable commerce approaches (if using BigCommerce as headless backend) * Experience with version control (Git) and modern development workflows (CI/CD) * Strong debugging and problem-solving skills across frontend and backend layers Nice to Have * Experience with BigCommerce's Catalyst (Next.js) framework for headless storefronts * Familiarity with Node.js, React, or other JS frameworks * Background with other ecommerce platforms (Shopify Plus, Salesforce Commerce Cloud, Magento, SAP Commerce) for context/migration work * BigCommerce certifications (e.g., BigCommerce Developer Certification) * Experience with A/B testing tools, personalization engines * Knowledge of SEO best practices for ecommerce * Experience in a B2B ecommerce environment (customer groups, price lists, quoting)