Yash Kalan

Architected a reusable React component library (modals, form containers, data grids with export) used across the application, reducing feature delivery time by ~30%. Implemented lazy loading, code splitting, and rendering optimisations for large dataset dashboards, cutting initial load time by ~35%. Designed and maintained RESTful API endpoints in Node.js with JWT authentication, MySQL/Sequelize, Redis caching, and AWS S3 storage — owning full-stack features end-to-end. Delivered 100+ production PRs in a 3-engineer Agile team, and migrated legacy jQuery UIs to a modular React + TypeScript system. Maintained Docker-based development environments and contributed to CI/CD pipelines.

Migrated legacy backend functionality from PHP to Node.js (TypeScript), designed scalable RESTful APIs and improved long-term maintainability. Optimized SQL queries and implemented indexing strategies, significantly improving backend response times and data retrieval efficiency. Designed backend business logic using a service-oriented architecture, refactoring monolithic components into modular services. Implemented secure API authentication using JWT-based authorization patterns. Built data-driven reporting systems supporting dynamic dashboard generation and exportable formats (Excel/PDF). Contributed 100+ production-level pull requests, implementing hotfixes and resolving high-priority issues in live environments. Collaborated cross-functionally in Agile sprints to deliver stable, production-grade backend releases.

Built reusable React components for enterprise reporting solutions, improving UI consistency and accelerating delivery. Integrated frontend with REST APIs, managed loading states and client-side state across features. Improved reliability through Jest/Jasmine unit testing and active code review participation.