SACHIN TAMBESHWAR

▸ Built the end-to-end Exam Seat Allocation feature — designed the UI component architecture, integrated REST APIs, and collaborated with backend engineers to agree on request/response contracts; replaced a manual spreadsheet process entirely. ▸ Designed a dynamic Result Publishing interface with real-time data sync — applied React Query caching and background refetching to reduce redundant API calls and improve perceived load times on slow connections. ▸ Delivered pixel-perfect, responsive Figma-to-production UI across bi-weekly sprints with zero post-release defects on assigned features. ▸ Participated in Agile ceremonies (backlog grooming, sprint planning, demos) and flagged API/technical constraints early during design reviews.

▸ Developed Node.js + Express.js REST API endpoints for shift scheduling and roster management — implemented JWT-protected routes, MongoDB integration, and structured error handling that measurably reduced uncaught API errors in production. ▸ Architected ATSM (ATC Staff Management System) as sole full-stack owner — designed the data models, built Express.js APIs, and implemented the React.js + Redux Toolkit frontend with complex shift scheduling workflows and virtualised data grids (react-window, 10,000+ rows). ▸ Built a reusable shared component library adopted across 5+ enterprise modules — enforced consistent design patterns and cross-browser compatibility (Chrome, Firefox, Safari), significantly reducing new-feature development effort. ▸ Implemented route-based code splitting (React.lazy + Suspense), lazy loading, and asset optimisation — improved first-paint and Core Web Vitals on target hardware. ▸ Built a custom Gantt chart React component with drag-and-drop rescheduling, nested task dependencies, and virtualisation for data-heavy rostering dashboards. ▸ Built a centralized theme builder enabling consistent styling changes across the entire application from a single configuration point.