Lead Software Engineer - Big Commerce

EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.

We are seeking an experienced Lead Software Engineer with deep BigCommerce expertise to architect and deliver next-generation storefront experiences. In this role, you will drive end-to-end technical leadership for headless and native commerce implementations, mentor a distributed engineering team, and shape modern, high-performing, omnichannel digital experiences.

Responsibilities

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

Requirements

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

Nice to have

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

We offer

Opportunity to work on technical challenges that may impact across geographies

Vast opportunities for self-development: online university, knowledge sharing opportunities globally, learning opportunities through external certifications

Opportunity to share your ideas on international platforms

Sponsored Tech Talks & Hackathons

Unlimited access to LinkedIn learning solutions

Possibility to relocate to any EPAM office for short and long-term projects

Focused individual development

Benefit package:

Health benefits

Retirement benefits

Paid time off

Flexible benefits

Forums to explore beyond work passion (CSR, photography, painting, sports, etc.)