Frontend Developer - React.js & Next.js

KUMAR D

Frontend Software Engineer · React.js · Next.js · TypeScript·

+91-637******* · *****.*************@*****.*** · linkedin.com/in/kumard · github.com/udhayakumarcr7 · Madurai, Tamil Nadu

Professional Summary

Frontend Software Engineer with 4+ years of experience building scalable, high-performance enterprise web applications using React.js, Next.js, TypeScript, and JavaScript. Experienced in frontend architecture, reusable component development, secure API integration, performance optimization, and modern UI engineering for SaaS, FinTech, ATS, fundraising, and enterprise applications. Technical Skills

Frontend Engineering: React.js, Next.js, TypeScript, JavaScript (ES6+) State Management: Redux Toolkit, Context API, Custom Hooks UI Engineering: Material UI (MUI), Tailwind CSS, Bootstrap, HTML5, CSS3, SCSS/SASS API Integration: REST APIs, Axios, Fetch API, Request Interceptors, Error Handling, WebSocket Performance Engineering: React.memo, useMemo, Lazy Loading, Code Splitting, Bundle Optimization, Image Optimization, Core Web Vitals, Lighthouse

Security: JWT Authentication, Role-Based Access Control (RBAC), Protected Routes, AES-256 Encryption (Cryp- toJS), Input Validation, GDPR Compliance

Testing: Jest, React Testing Library

Developer Tools: Git, GitHub, Azure DevOps, VS Code, Postman, Swagger, JIRA, Chrome DevTools Build Tools: Vite, Webpack, npm, ESLint, Prettier

Engineering Practices: Component-Driven Development, Responsive Design, Accessibility (WCAG), SEO, Ag- ile/Scrum, Cross-Browser Compatibility, Code Reviews Professional Experience

Frontend Developer

Feb 2022 – Present

Technogenesis Software Solutions, Madurai

• Engineered scalable enterprise web applications using React.js, Next.js, and TypeScript, delivering production- ready solutions for SaaS, FinTech, ATS, and customer-facing platforms.

• Designed and maintained a reusable component library consisting of 40+ production-ready UI components, improving code reusability, UI consistency, and reducing feature development effort by 25%.

• Architected secure frontend workflows by integrating REST APIs with centralized request handling, authentication, request interceptors, error management, and optimized data synchronization.

• Implemented enterprise-grade security using JWT authentication, Role-Based Access Control (RBAC), AES-256 field-level encryption (CryptoJS), protected routes, and GDPR-compliant frontend practices.

• Optimized application performance through lazy loading, code splitting, React.memo, useMemo, bundle optimiza- tion, and Lighthouse-driven improvements, enhancing Core Web Vitals and user experience.

• Collaborated with cross-functional teams through Agile development, Git workflows, peer code reviews, production debugging, and release management to deliver high-quality software. Projects

Thambraas — Fundraising & Donation Platform

Tech Stack: React.js, TypeScript, Tailwind CSS, Material UI, Stripe API, QuickBooks Online API, CryptoJS

• Architected a scalable fundraising platform with a public donation portal and RBAC-enabled admin dashboard supporting campaign, donor, and payment management.

• Integrated Stripe Payment APIs and QuickBooks Online API for secure payment processing, webhook-driven transaction synchronization, automated accounting, and financial reconciliation.

• Implemented JWT authentication, AES-256 field-level encryption (CryptoJS), protected routing, and GDPR- compliant data handling for secure financial transactions.

• Optimized application performance using React.memo, useMemo, lazy loading, code splitting, and reusable component architecture, improving maintainability and Core Web Vitals. Talentify — Applicant Tracking System

Tech Stack: Next.js, TypeScript, Tailwind CSS, Redux Toolkit, REST APIs, JWT

• Developed an enterprise Applicant Tracking System (ATS) supporting recruitment workflows including job publishing, candidate management, interview scheduling, and hiring pipelines.

• Designed reusable UI components and scalable application architecture using Next.js and TypeScript with centralized REST API integration.

• Implemented JWT authentication, RBAC, protected routing, pagination, filtering, and dynamic data synchro- nization for secure enterprise workflows.

• Improved rendering performance using React.memo, useMemo, virtualization, lazy loading, and debounced search for handling large candidate datasets.

Accupayd — FinTech Platform

Tech Stack: React.js, Material UI, SCSS, REST APIs, CryptoJS

• Built secure fintech modules for rental payments, transaction processing, payment tracking, and financial operations using React.js.

• Integrated REST APIs with centralized request handling, optimistic UI updates, and robust client-side validation for reliable payment workflows.

• Implemented AES-256 encryption, JWT authentication, secure session management, and PCI-DSS aligned frontend practices for sensitive financial data.

• Developed reusable components and optimized rendering performance to deliver responsive, scalable, and production-ready financial applications.

E-Commerce Platform

Tech Stack: React.js, Bootstrap, SCSS, REST APIs

• Developed a responsive e-commerce application supporting product discovery, shopping cart, secure checkout, payment integration, and order management.

• Implemented advanced filtering, sorting, URL-based state management, and reusable UI components to improve user experience and maintainability.

Corporate Website — Technogenesis

Tech Stack: Next.js, TypeScript, Tailwind CSS, GSAP, Framer Motion, REST APIs

• Developed a high-performance corporate website using Next.js with SSR, SSG, responsive UI architecture, and CMS-driven content management.

• Optimized SEO, Core Web Vitals, accessibility, and user experience through code splitting, image optimization, and modern animation frameworks.

Achievements

• Best Find of the Year — 2022: Recognised by leadership for exceptional rapid onboarding, strong problem- solving, and immediate measurable impact within the first quarter.

• The Shining Star Award: Awarded for outstanding individual contributions, consistent delivery of high-quality frontend solutions, and going beyond assigned scope.

• Super Squad of the Year — 2023: Team award recognising exceptional cross-functional collaboration and delivery of complex projects within tight timelines. Education

Bachelor of Engineering — Electronics & Communication (ECE) 2016 – 2020

St. Mother Theresa Engineering College, Tuticorin

Contact this candidate