Senior React Developer with TypeScript Expertise

YASHWANTH

***********.***@*****.*** +1-978-***-**** linkedin.com/in/yashwanth100254389

ABOUT ME

React Developer with 5+ years of experience delivering modern, responsive web applications using React, TypeScript, JavaScript, and CSS/SCSS. Strong in component-driven architecture, custom hooks, Redux-based state management, and integrating REST/GraphQL services for real-time, data-centric interfaces. Experienced working with Node.js and .NET APIs, micro-frontend patterns, and Azure/AWS CI/CD pipelines. Focused on building high-performance, accessible, and user-centric front-end solutions that scale.

TECHNICAL SKILLS

Programming Languages

C#, VB.NET, JavaScript, TypeScript, PowerShell

Cloud Platforms

Azure DevOps Pipelines, GitHub Actions, Docker, Kubernetes (UI container deployments), AWS ECS / Lambda (front-end hosting & serverless integration)

Frontend Technologies

Angular, React.js (Hooks, Context API, Redux), Vue.js, Next.js, HTML5, CSS3/SCSS, Tailwind CSS, Bootstrap, Material UI, JavaScript (ES6+), TypeScript, Responsive UI, Cross-Browser Compatibility, Web Accessibility (WCAG), NgRx, Redux, Context API, Vuex, RxJS

Backend & Frameworks

Node.js, Express.js, FastAPI (for UI-side microservices and integration), ASP.NET Core Web API (integration experience), OAuth2, JWT, Swagger / Postman, API Gateway

Database Technologies

SQL Server, PostgreSQL, MongoDB, Azure Cosmos DB, MySQL, T-SQL, PL/SQL,

SSIS, SSRS

Tools & Methodologies

Visual Studio, VS Code, SSMS, JIRA, Agile (Scrum, SAFe), API Management, Figma, Chrome DevTools, Lighthouse

PROFESSIONAL EXPERIENCE

Mayo Clinic- Sr React Developer Jan 2023 – Present

Designed and implemented real-time emergency alert dashboards using React 18/19 and TypeScript for hospital staff during critical events.

Built reusable React components, custom hooks, context providers, and utility modules powering alert broadcasting, triage queues, and live activity feeds.

Integrated REST APIs and WebSocket channels to deliver instant push notifications and live status updates across hospital departments.

Developed complex React forms using React Hook Form, Yup validations, controlled components, and custom hooks for high-reliability user interaction.

Implemented role-based user flows for doctors, nurses, coordinators, and admins using OAuth2/JWT authentication.

Created a live incident board showing active alerts, responder status, geolocation pins, and escalation levels in real time via WebSockets.

Added priority-based routing and escalation logic supporting Code Blue, trauma, fire, and disaster severity levels.

Optimized performance with React Suspense, lazy loading, memoization, virtualization, and API caching, reducing UI load time by ~45%.

Implemented Next.js SSR and SSG for analytics dashboards, improving first-paint performance and SEO for documentation modules.

Developed Node.js (Express) and FastAPI micro-APIs for alert dispatch, acknowledgment workflows, and staff presence tracking.

Utilized FastAPI async endpoints and WebSockets to support high-volume, low-latency alert triggers.

Stored incident history, acknowledgment logs, and audit trails in MongoDB with optimized indexing for fast retrieval.

Built real-time communication channels for emergency responders using AWS SNS/SQS and serverless event workflows.

Managed AWS Lambda, API Gateway, CloudWatch, and GCP Cloud Run to ensure high availability during emergency scenarios.

Automated deployments through Azure DevOps pipelines, adding unit tests, build gates, and security scanning before release.

Migrated legacy AngularJS triage screens to a modern React 18 interface, significantly improving UX responsiveness and maintainability.

Collaborated with clinicians to convert complex emergency workflows into React UI wireframes, prototypes, and final user flows.

Conducted performance and load testing to guarantee zero-lag alert delivery during peak emergency simulations.

Developed Jest, React Testing Library, and MSW test suites for components, hooks, reducers, and backend service mocks.

Supported on-call deployments, resolved production issues quickly, and delivered rapid fixes during live emergency drills.

Kyndryl, India - React Developer Sep 2021 – Aug 2022

Developed modern, data-driven UI screens for policy and claims processing using React, TypeScript, JavaScript, HTML5, and CSS3.

Built reusable React components, custom hooks, context providers, and shared utility modules supporting onboarding, claims submission, approvals, and policy search.

Designed end-to-end UI workflows using React Router, lazy loading, protected routes, and form validations with React Hook Form + Yup.

Integrated UI with REST APIs and legacy SOAP endpoints, handling policy lookup, customer profile checks, and claims status retrieval.

Implemented AJAX/XHR, JSON/XML parsing, and compatibility handlers to bridge modern React flows with legacy systems.

Delivered responsive, accessible layouts using Bootstrap, Flexbox, Grid, and media queries, ensuring cross-device performance.

Utilized React Query / Axios / Fetch, along with Promises and async/await, for robust asynchronous data fetching and caching.

Managed predictable application state using Redux Toolkit, Zustand, and Context API, optimizing multi-step claims workflows.

Collaborated with product owners and business teams to convert business rules into React wireframes, flows, and UI prototypes.

Improved performance by optimizing render cycles, memoization, component splitting, caching, and DOM virtualization.

Built interceptors/middleware for token refresh, global logging, and centralized error handling (Redux middleware / Axios interceptors).

Used Azure DevOps Boards for managing feature development, bug triage, and sprint deliverables.

Worked closely with UX teams to enhance navigation, usability, accessibility, and claims submission experience.

Collaborated with backend engineers to define Swagger/OpenAPI contracts, request/response models, and test APIs with Postman.

Integrated Azure Queue and Event Grid triggers into React workflows to reflect real-time claim progress and task updates.

Connected policy modules with Azure Blob Storage for secure PDF viewing, uploads, and document retrieval.

Containerized the React project using Docker, and automated builds/deployments through Azure DevOps CI/CD pipelines.

Wrote unit tests for components, hooks, services, and utils using Jest, React Testing Library, and MSW.

Performed cross-browser testing, WCAG accessibility improvements, and UI regression testing across supported browsers.

Participated in Agile ceremonies including stand-ups, sprint planning, backlog refinement, and retrospectives.

Marks & Spencer’s– Software Developer April 2020 – Aug 2021

Developed high-performance, responsive e-commerce interfaces using React, TypeScript, JavaScript, HTML5, and CSS3.

Built modular React components, custom hooks, Redux Toolkit stores, reusable UI widgets, and shared services for catalog, cart, and checkout workflows.

Supported cross-framework initiatives by integrating React modules alongside existing Angular components for merchandising and inventory systems.

Integrated REST APIs to render real-time product data, pricing, inventory availability, and order-processing updates.

Optimized performance using lazy loading, route-level code splitting, React Suspense, caching, memoization, and DOM optimization techniques.

Delivered pixel-perfect, mobile-first UI aligned with UX guidelines across desktop, tablet, and mobile viewports.

Implemented React Hook Form with Yup validations, robust error handling, async API workflows, and streamlined data-flow logic for checkout reliability.

Led UI requirement sessions and sprint planning to convert business needs into React components, user flows, and feature screens.

Created UI wireframes, mockups, user stories, and acceptance criteria for product listings, filters, checkout, and order-tracking features.

Collaborated with QA to define UI test scenarios, perform defect triage, and verify front-end functionality.

Conducted cross-browser testing, WCAG accessibility validation, and responsive testing to ensure consistent user experience.

Integrated the React UI with microservice-based backend APIs supporting product listings, order submissions, and fulfillment events.

Used Git branching workflows for collaborative development, code reviews, and managing versioned releases.

Automated builds, tests, and deployments through Docker-based pipelines using GitHub Actions, Azure DevOps, or similar CI/CD systems.

Worked with MongoDB and SQL-backed APIs to support UI-driven search, reporting, and product metadata retrieval.

Participated in Agile ceremonies including sprint planning, daily standups, backlog refinement, and retrospectives.

Partnered with product owners, UX teams, and backend developers to deliver on-schedule, incremental feature releases.

Designed scalable React UI architecture based on component-driven design, micro-frontend patterns, and REST-first principles.

Built accessible, mobile-first layouts using Tailwind CSS, Bootstrap, and custom CSS utility systems.

Delivered smooth navigation and optimized user flows, increasing user engagement and improving checkout success rates.

EDUCATION

Master of Computer Science 2024

Bachelor of Computer Science 2021

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