Nisith Mohanty

Senior Frontend Engineer / Senior UI Engineer with 9+ years of experience building scalable, secure, and high-performance enterprise web applications using React.js, Angular, TypeScript, JavaScript, RxJS, NgRx, Redux Toolkit, Zustand, TanStack Query, HTML5, SCSS, Tailwind CSS, and REST APIs. Experienced in frontend architecture, reusable UI components, secure frontend flows, performance-optimized data-heavy screens, responsive web applications, and production-grade React and Angular modules. Proven record of improving page load time by approximately 15%, improving UI responsiveness by approximately 20%, reducing redundant API calls by approximately 20%, reducing duplicate frontend code by approximately 25%, improving website performance by 25%, and increasing test coverage to 92%.

Senior Software Engineer at Visa (2022-07 – Present)

Project: VAS Sales Navigator / Visa Value Calculator. Enterprise sales enablement and value-based financial selling platform built to help Visa client-facing teams identify client-specific Value Added Services, analyze business problems, and generate ROI-driven insights for early-stage deal conversations.

• Developed production-grade frontend modules using React.js, Angular, TypeScript, JavaScript, RxJS, Redux Toolkit, HTML5, SCSS, Tailwind CSS, and REST API integration.
• Built production React.js modules using functional components, React Hooks, Redux Toolkit, Zustand, TanStack Query, custom hooks, reusable component patterns, controlled forms, and API-driven UI rendering.
• Developed scalable Angular modules using RxJS, reactive forms, services, routing, lazy loading, OnPush change detection, trackBy, HTTP interceptors, and component-based architecture.
• Built scalable and extensible UI components for product recommendations, value calculator journeys, regional filtering, client problem selection, product eligibility, sales play alignment, and recommendation ranking.
• Improved application page load time by approximately 15% through Angular lazy loading, React code splitting, image compression, asset optimization, tree shaking, bundle-size reduction, caching, and optimized API consumption.
• Improved UI responsiveness on data-heavy recommendation screens by approximately 20% using pagination, virtual scrolling, optimized filtering, memoization, React.memo, useMemo, useCallback, trackBy, OnPush change detection, debouncing, throttling, and reduced DOM re-rendering.
• Reduced redundant API calls by approximately 20% through optimized RxJS streams, request caching, reusable data services, conditional API loading, HTTP interceptors, TanStack Query caching, and improved component lifecycle handling.
• Reduced duplicate frontend code by approximately 25% by creating reusable Angular/React components, shared services, custom hooks, common utilities, form validators, and standardized UI patterns.
• Implemented secure frontend flows using JWT, RBAC, route guards, HTTP interceptors, secure cookies, protected routes, and enterprise session management.
• Improved release quality through code reviews, defect triage, unit testing with Jest, Jasmine, and Karma, integration testing, release validation, and production support.
• Collaborated with product, UX, backend, QA, and regional sales teams across multiple geographies in Agile/Scrum to deliver responsive, accessible, cross-browser compatible, and maintainable enterprise UI solutions.

Senior Frontend Developer at Operative (2020-01 – 2022-07)

Projects: Ratecard, Product Chooser. Ratecard is a web system used to monitor and moderate market advertising. Product Chooser is a reusable UI library integrated with Ratecard to add advertising products into existing ratecard lines.

• Implemented performance tuning techniques including build package size reduction, dataset caching, and NgRx store, increasing website performance by 25%.
• Designed, implemented, hosted, and integrated a reusable UI library into the Ratecard project.
• Resolved 275+ tickets across enhancements, client issues, debugging, maintenance, and production support.
• Delivered 4 major enhancements while coordinating with UI team members and stakeholders.
• Followed Test-Driven Development using Karma and Jasmine, increasing code coverage to 92%.
• Worked extensively with PrimeNG, AG Grid, Moment.js, and Lodash to enhance project functionality.
• Trained and mentored 4 developers on frontend fundamentals through regular UI sessions.

Frontend Developer at Infrrd (2019-08 – 2020-01)

• Built responsive frontend interfaces from product and UX requirements while supporting code reviews for security, browser compatibility, and device compatibility.

Software Engineer at Zycus (2018-10 – 2019-08)

• Built reusable Angular and TypeScript components, dynamic forms, and template-based UI workflows for procurement source-to-pay applications.

System Engineer at Tata Consultancy Services (2016-11 – 2018-10)

• Developed Angular-based admin modules, integrated frontend screens with APIs and JSON web services, and supported production issue resolution for payment applications.

Bachelor of Technology in Electrical Engineering – College of Engineering and Technology, Bhubaneswar (2012 – 2016)