SARANGSUNIL CHAUDHARY

Engineered a production pnpm monorepo (6 packages) on Next.js 16 + React 19 with Turbopack, proxy middleware, async APIs, and CSS-first Tailwind v4 — delivering independent deployability across all services.

Architected a 3-layer cache (Valkey + ISR + CloudFront with batched invalidation) and a hash-per-category sitemap engine with O(1) updates, Contentful/WordPress merging, and international variant support, validated at 150,000+ entries — cutting response from 800ms to under 50ms and CDN costs by 80%.

Integrated Contentful headless CMS with dual GraphQL clients, 12+ content types, full SEO metadata (OG, Twitter, canonical, robots), and Live Preview SDK with Inspector Mode — enabling live content updates without redeployment.

Delivered 24+ accessible React components (React Aria + Tailwind v4) with a type-safe PageBuilder, Storybook 10 visual regression, nonce-based CSP, HSTS, and PII-safe logging — deployed via GitHub Actions to AWS ECR/ECS in under 8 minutes.

Engineered a cross-platform solution serving 29+ countries, 1.29M+ users, 2.09M+ sessions, and $16M in revenue within one month of tech stack migration.

Built an SEO-optimized location system with Next.js SSR, custom XML sitemaps, and Google Maps integration, significantly improving SERP rankings and organic traffic.

Implemented a secure multi-payment system (credit cards, Google Pay, gift cards) with account management and checkout flows, driving a 17-minute average session duration.

Optimized performance via state management, code splitting, and caching; established Jest with 90%+ coverage and integrated Google Tag Manager for behavior analytics.

Developed a comprehensive analytics dashboard with role-based access control, enabling administrators and branch managers to track marketing ROI and performance metrics.

Built a data visualization system with ECharts, Leaflet heat maps, and MUI tables with dynamic filtering, plus promotion management for multiple offer types.

Designed a secure RBAC infrastructure with dynamic menu generation and a protected asset repository, optimizing performance while maintaining data security.

Built a contactless hospitality system (CLEAR verification, Virdee mobile keys) with location-based venue features for 200+ locations across 75 countries, Everi payment processing, and a tiered loyalty program.

Enhanced performance through WebView architecture and dynamic content management (Sitecore/Firebase), implementing A/B testing for data-driven UX improvements.

Architected a Next.js 15 SSG application with multi-locale support (en-US, en-CA, fr-CA), dynamic routing, automated sitemaps, canonical URLs, JSON-LD schema, and a headless JSON-driven content architecture with 15+ TypeScript interfaces.

Engineered 25+ reusable, accessible React components with MUI theming, interactive quizzes, parallax scrolling, and viewport-based animations — documented and validated via Storybook.

Established automated build validation, Jest unit testing, CSP headers, and accessibility compliance checks for consistently high-performance production exports.

Architected a responsive interactive UI with dynamic form generation and a real-time video previewer for seamless client-side template customization (container types, sizes, colors, branded elements) in collaboration with motion designers.

Implemented an optimized asset management system reducing cloud storage costs while maintaining high-quality previews; built robust state management with comprehensive validation and 90%+ test coverage via Vitest.

Embedded GitHub Copilot, OpenCode, Claude, and ChatGPT into daily workflows for 2.5+ years across code generation, debugging, and test authoring — maintaining full architecture ownership while consistently shipping faster and with higher quality.

Engineered a production-ready AI onboarding system: copilot-instructions.md, 4 specialized Copilot agents (FE Agent, Docs Generator, Code Reviewer, OpenCode Agent), and a structured AI wiki — adopted across multiple projects to enforce architecture standards and accelerate team onboarding.

Configured OpenCode MCP servers for Jira, Figma, and Contentful sandbox — enabling context-aware AI development directly from design specs, tickets, and live content schemas without context-switching.