Kumar B

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.

About