Kumar B

MERN Stack Developer with 2+ years of experience building scalable full-stack web applications. Proficient in React.js, Node.js, Express.js, MongoDB, and PostgreSQL. Skilled in TypeScript, Redux, TanStack Query, and REST API development.

Experienced with Docker containerization and Git version control. Built responsive, high-performance UIs and secure JWT-authenticated backends. Passionate about clean code, performance optimization, and end-to-end feature ownership.

Immediate joiner, actively seeking roles where I can contribute to product growth and technical excellence.

Full Stack Developer (MERN) at Kayala's Private Limited (2026-01 – Present)

Kayalas Overseas (Education, Recruitment & Immigration CRM)

• Architected and shipped a full-stack CRM platform with React.js, JavaScript, TanStack Query, Node.js, and Supabase, centralizing lead management, application tracking, and visa consultation workflows for the counseling team.
• I used JavaScript to develop React components, manage application state, validate forms, call REST APIs, handle asynchronous operations with async/await, manipulate data, and build backend APIs using Node.js and Express. JavaScript was the primary language used throughout the application.
• Enforced enterprise-grade security by implementing Supabase Auth, JWT, OAuth 2.0, RBAC, and PostgreSQL Row Level Security, ensuring granular data access across Admin, Manager, and Counselor roles.
• Consolidated lead management and multi-stage application workflows, improving counselor productivity by 30%.
• Optimized data-fetching and caching with TanStack Query, cutting redundant API calls by 40% and improving page load speed.
• Deployed and secured a document management system using Supabase Storage with role-based access controls.
• Automated customer communication by integrating Resend and Supabase Edge Functions for welcome emails, document checklists, and real-time notifications.

Full Stack Developer at Software Galaxy Systems (2025-07 – 2025-10)

Skolasti LMS (Enterprise Education & Learning Management Platform)

• Built and scaled full-stack modules for an enterprise LMS using React.js (Vite), Node.js, and Express.js, reducing average API response time by 30% through query tuning and caching.
• Developed reusable Express.js middleware for authentication, request validation, and error handling, hardening API security with Helmet.js, rate limiting, and CORS policies.
• Architected micro-frontend modules using Module Federation, enabling 4 cross-functional teams to deploy independently and cutting release coordination time by ~35%.
• Delivered responsive course-authoring tools and a mobile-friendly learner portal for seamless cross-device access.
• Integrated FusionAuth OAuth 2.0 for secure SSO and Razorpay for end-to-end payment processing with webhook support.

MERN Stack Developer at Perfex Technologies (2022-12 – 2025-02)

HR Dashboard (Human Resource Management & Analytics Platform)

• Developed and enhanced responsive web applications with React.js, Node.js, Express.js, and MongoDB, driving a 25% improvement in user engagement.
• Designed and refined MongoDB schemas using Mongoose to support a scalable, modular application architecture.
• Built RESTful APIs with Node.js and Express.js, implementing robust error handling, input validation, and structured logging.
• Streamlined state management using React Hooks, Redux, and Context API, achieving a 20% improvement in rendering performance.
• Improved application performance by 10% through lazy loading, code splitting, and Webpack bundle tuning.
• Implemented JWT-based authentication, authorization middleware, and role-based access control for business-critical workflows.
• Connected third-party payment, email, and analytics APIs to extend core platform capabilities.
• Engineered MongoDB aggregation pipelines for attendance tracking and activity analytics, cutting manual HR reporting time by 40%.
• Collaborated with UX designers and solution architects, maintaining clean, well-documented code through Git branching, pull requests, and code reviews.

Bachelor of Technology (B.Tech) in Computer Science – Christu Jyothi Institute of Technology & Science (2013-09 – 2019-05)