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NandhakumarE/README.md

πŸ‘‹ Hi, I'm Nandhakumar Eswaran

Nandhakumar Eswaran

Senior Frontend Engineer | React Performance Specialist

I build scalable, high-performance UIs that millions use daily.

LinkedIn LeetCode Email


πŸ“ˆ Impact at Scale

const impact = {
  designSystemSavings: "$10K+ per year",
  customerReachExpansion: "20%",
  developersMentored: "700+",
  keyFeaturesShipped: ["Form Builder", "Site Builder", "Rule Builder", "Expression/Formula Builder"],
  focusArea: "Performance-driven architecture"
};

🎯 What I Do Best

Component Architecture & Design Systems

Built Form Builder, Site Builder, Rule Builder, and Formula Builder that scaled across teams:

  • Created reusable design system that saved $10K+ annually in development costs
  • Established component patterns used by multiple product teams
  • Reduced feature development time through systematic architecture

Performance & Scalability

Optimized applications serving millions of users:

  • Focused on performance-driven architecture from the ground up
  • Implemented code-splitting and lazy loading strategies
  • Built monitoring systems to track Core Web Vitals

Technical Leadership

  • Mentored 700+ aspiring developers on frontend best practices
  • Led development of critical features that expanded customer reach by 20%
  • Established coding standards and review processes
  • Boosted developer productivity through better tooling and patterns

πŸ”§ Technical Expertise

Frontend (Expert - 6+ Years)

Core Technologies
React TypeScript JavaScript Next.js HTML5 CSS3

Styling & Design
Tailwind CSS Sass Bootstrap CSS Modules

Build & Performance
Webpack Vite Code Splitting Performance Optimization

Testing & Quality
Jest Vitest Testing Library E2E Testing

Backend (Actively Expanding)

Runtime & APIs
Node.js Express REST APIs

Databases
PostgreSQL MongoDB MySQL Sequelize

Infrastructure
Docker Jenkins Git CI/CD Nginx


πŸ’Ό Featured Projects

React Β· TypeScript Β· Performance Optimization

Feature-rich text editor focused on clean UX and performance.

Technical highlights:

  • Custom editor architecture for optimal rendering
  • Plugin system for extensibility
  • Performance-optimized for large files
  • View Project β†’

Why this matters: Building editors requires deep understanding of React performance patterns, event handling, and state management at scale.


TypeScript Β· Software Architecture Β· Best Practices

Production-tested design patterns with real-world applications.

Includes:

  • Creational, Structural, and Behavioral patterns
  • When to use each pattern (and when not to)
  • TypeScript-specific implementations
  • Real-world examples from component libraries

Why this matters: Pattern knowledge separates engineers who "write code" from those who "architect systems."


JavaScript Β· Core Concepts Β· Polyfills

Deep dive into JavaScript internals through building core functionality from scratch.

Implementations include:

  • Array methods (map, filter, reduce, flat, flatMap)
  • Function utilities (bind, call, apply)
  • Promise implementation
  • Debounce, throttle, memoization patterns

Why this matters: Understanding how JavaScript works under the hood makes you better at debugging production issues and writing performant code.


πŸŽ“ Currently Expanding

Full-Stack Capabilities

Building production-ready backend systems to understand the full picture:

Learning:

  • Docker & containerization for consistent deployments
  • Jenkins & CI/CD for automated pipelines
  • AWS for cloud infrastructure

Goal: Combine frontend expertise with backend understanding to own features end-to-end. Better frontend decisions come from knowing backend constraints.


πŸ“ Technical Writing

I share insights and learnings on LinkedIn, covering:

  • React performance optimization strategies
  • Component architecture patterns
  • Design system best practices
  • Frontend-to-backend transition lessons
  • Production debugging experiences

πŸ’‘ What I'm Looking For

I'm interested in roles where I can:

  • βœ… Build design systems and component libraries at scale
  • βœ… Optimize performance-critical user interfaces
  • βœ… Work on products that impact millions of users
  • βœ… Mentor engineers and establish frontend excellence
  • βœ… Own features end-to-end (frontend + backend)

Companies I admire: Airbnb (design systems), Stripe (developer experience), Meta (scale challenges), Vercel (frontend innovation)


πŸ† Professional Background

Current: Senior Frontend Engineer
Experience: 6+ years building production web applications

Key Achievements:

  • 🎯 Created design systems saving $10K+ per year
  • 🎯 Expanded customer reach by 20% through key features
  • 🎯 Mentored 700+ developers on frontend architecture
  • 🎯 Led development of Site Builder, Rule Builder, Formula Builder
  • 🎯 Boosted developer productivity through performance-focused architecture

πŸ“« Let's Connect

I'm always interested in discussing:

  • React architecture and performance patterns
  • Component library design strategies
  • Design system implementation challenges
  • Interesting problems you're solving at scale

Reach out:

  • πŸ’Ό LinkedIn - Professional discussions
  • πŸ’» LeetCode - Problem-solving profile
  • πŸ“§ Email - Opportunities and collaboration

"Simplifying complex frontend problems, one component at a time."

GitHub Stats

Pinned Loading

  1. react-visual-querybuilder react-visual-querybuilder Public

    Headless React query builder with compound components, render props, TypeScript & drag-and-drop. Works with any design system.

    TypeScript

  2. lexpad lexpad Public

    A lightweight, customizable text editor built with React and Lexical β€” focused on clean UX, extensibility, and rich text editing experiments.

    TypeScript 1

  3. just-js-prep just-js-prep Public

    Production-ready JavaScript polyfills and core implementations with comprehensive tests. Understanding JS internals by building from first principles

    JavaScript 2

  4. design-patterns-ts design-patterns-ts Public

    Real-world design patterns in TypeScript with production use cases. Each pattern includes: problem it solves, when to use, trade-offs, and working examples.

    TypeScript 1

  5. react-ssr react-ssr Public

    Investigating React SSR performance patterns. Built with Redux, route-based data fetching, and safe state hydration. Exploring trade-offs between client-side and server-side rendering for optimal UX.

    JavaScript