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Senior React JS Developer @ Zensar

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 Senior React JS Developer

Job Description

Role & responsibilities


We are looking for a React Developer with strong ecommerce experience to build high-performing, accessible, and SEO-friendly web experiences. You will work across the front-end stack (React/Next.js), integrate with commerce platforms and APIs, optimize performance for conversion, and collaborate closely with product, design, and backend teams.


  • Feature Development: Build responsive, reusable UI components and pages using React/Next.js (SSR/SSG/ISR) for ecommerce flows (catalog, PDP, cart, checkout, account).
  • Integration: Integrate with commerce platforms (e.g., Shopify, Magento/Adobe Commerce, Salesforce Commerce Cloud) or custom headless APIs (REST/GraphQL), including pricing, promotions, inventory, and OMS.
  • Performance & SEO: Implement Core Web Vitals best practices (LCP, CLS, INP), image optimization, code-splitting, caching/CDN strategy, and SEO features (meta tags, schema, sitemaps).
  • State & Data Management: Use Redux/RTK, React Query/TanStack, or Context API for reliable state and data fetching; handle pagination, filters, and session persistence.
  • Payments & Security: Integrate payment gateways (Razorpay, Stripe, PayPal), address PCI-compliant patterns, and secure client-side operations.
  • Accessibility: Ensure WCAG 2.1 AA compliance using semantic HTML, ARIA patterns, focus management, and keyboard navigation.
  • Testing & Quality: Write unit/integration tests (Jest, React Testing Library, Cypress/Playwright), maintain CI quality gates, and participate in code reviews.
  • Analytics & Experimentation: Implement trackers (GA4/Pixel/Segment), event schemas, and experimentation frameworks (A/B testing).
  • Collaboration: Work with designers on component libraries/Design Systems (Figma code), and with backend/devops on API contracts and deployments.
  • Support & Maintenance: Monitor production, triage issues, optimize for conversions, and contribute to documentation and best practices.

Responsibilities for Internal Candidates

  • 46 years of professional front-end development experience with at least 2+ years in ecommerce projects.
  • Advanced React skills (hooks, functional components), with production use of Next.js preferred.
  • Strong TypeScript skills; familiarity with ES6+, bundlers (Webpack/Vite), and modern CSS (Sass/Styled Components/Tailwind).
  • Experience integrating REST/GraphQL APIs and working with headless commerce architectures.
  • Hands-on with state management (Redux/RTK, React Query).
  • Proven performance optimization for Core Web Vitals and SEO.
  • Experience with authentication (JWT/OAuth), payments, and security best practices.
  • Proficiency with testing frameworks (Jest, RTL, Cypress/Playwright).
  • Familiarity with CI/CD, Git workflows, code reviews, and agile methodologies.
  • Excellent problem-solving and communication skills.

Job Classification

Industry: IT Services & Consulting
Functional Area / Department: IT & Information Security
Role Category: IT Support
Role: IT Support - Other
Employement Type: Full time

Contact Details:

Company: Zensar
Location(s): Hyderabad

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Keyskills:   Frontend Development React.Js Nextjs CSS Typescript Redux Javascript HTML

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