Lead Software Engineer - Big Commerce

EPAM Systems seeks a Lead Software Engineer with deep BigCommerce expertise to architect and deliver next-generation storefront experiences, drive technical leadership for headless and native commerce implementations, and mentor a distributed engineering team.

• Own the end-to-end BigCommerce storefront architecture (headless and native Stencil builds), including design system integration, component libraries, and performance guardrails
• Stand up and maintain modern front-end frameworks (React/Next.js/Remix), API orchestration layers, and personalization hooks that power dynamic, omnichannel experiences
• Translate UX designs into production-quality, responsive UI with meticulous attention to accessibility (WCAG 2.1 AA) and localization requirements (English & French Canadian)
• Lead code reviews, enforce engineering standards, and enable automated testing/CI pipelines for storefront repositories
• Implement advanced BigCommerce customizations: checkout flows, theme extensions, GraphQL storefront API usage, micro-frontend patterns, and integration of third-party apps (payments, search, loyalty, personalization)
• Orchestrate CMS, DAM, and marketing tool integrations to streamline content operations, campaigns, and PIM-driven merchandising updates
• Optimize site speed, SEO, Core Web Vitals, and maintain observability dashboards for proactive issue detection
• Mentor nearshore/offshore front-end engineers, coordinate day-to-day tasks, unblock dependencies, and foster an AI-augmented development culture
• Capture best practices, runbooks, and playbooks that support transition, onboarding, and continuous improvement without disrupting BAU releases

• 8+ years of front-end engineering experience delivering enterprise commerce or experience platforms
• 5+ years building on BigCommerce, including headless implementations using Storefront GraphQL, REST Admin API, Channels API, and BigCommerce Widgets/App frameworks
• Proficiency in modern JavaScript/TypeScript, React/Next.js (or Remix), and Node.js
• Expertise in CSS-in-JS, state management (Redux, Zustand), and component-driven development (Storybook, atomic design)
• Proven success leading client-facing engagements — able to translate UX and business goals into technical plans and articulate trade-offs in real time
• Showcase of delivering resilient, high-performing frontend experiences integrated with MACH services (CMS, search, personalization engines, CDP/CRM, DAM)
• Strong command of responsive design, accessibility, and SEO, along with analytics tagging and A/B testing enablement
• Background in CI/CD pipelines (GitHub Actions, Azure DevOps, CircleCI) and automated testing (Jest, Playwright, Cypress)
• Familiarity with performance optimization tools (Lighthouse, WebPageTest)
• English language skills at B2 level or higher
• Exposure to GCP/Vertex AI-enabled experiences, Dynamic Yield personalization, or conversational/agentic commerce solutions
• Familiarity with Shopify, commercetools, or SAP Commerce and ability to cross-pollinate composable best practices
• Knowledge of Canadian retail/promo calendars, bilingual content operations, and store-level digital tactics
• Experience with design ops, Figma-to-code workflows, and design system governance
• Comfort leveraging AI copilots and automation to accelerate development and regression coverage