Lead Web and Mobile development using React, React Native, Redux, TypeScript, JavaScript, React DnD and GraphQL, ensuring scalable architecture and alignment with business goals. Migrated legacy desktop applications to responsive modern web apps using React, improving UX and client engagement. Adopted micro-frontend architecture to modularize features and streamline multi-team development across independently deployable units. Enhanced application performance by reducing page load time by over 70% and improving component rendering efficiency. Delivered a secure, PCI-compliant 3-tier payment gateway system (Cards, Bank Drafts, Cash, Check) in Spring Boot and React with real-time/non-real-time transaction handling. Integrated real-time technician tracking using Google Maps API, improving dispatch operations and field visibility. Implemented role-based access control using React Context API for secure UI actions based on user profiles. Refactored and modernized project stacks: React, React Native, Redux, React DnD, GraphQL, Ant Design upgraded to latest stable versions. Migrated WebSocket subscriptions from subscriptions-transport-ws to graphql-ws using urql, ensuring better stability and long-term support. Led modular UI development using Ant Design and Material UI, ensuring reusability and design consistency across modules. Streamlined performance with profiling tools like Lighthouse, React DevTools, and Redux DevTools. Integrated DevOps practices: monitored CI/CD pipelines via Jenkins, analysed logs via Kibana, enforced static code analysis with SonarQube, and added Husky hooks and ESLint for code quality enforcement. Worked in Agile environment: resolved high-priority JIRA tickets, managed sprint deliverables, and contributed to feature planning and backlog grooming. Acted as the primary liaison between development and business teams, contributing to requirement analysis, stakeholder alignment, and delivery success. Mentored junior developers, conducted code reviews, and ensured workload balance to boost productivity and team performance. Built and maintained pipelines (Jenkins, GitHub Actions) for repeatable deployments across dev, qa, uat, and prod. Troubleshot cross-service issues spanning API gateways, microservices, relational database PostgreSQL and NoSQL Database MongoDB stores reducing incident resolution time by 40%. Designed event-driven integrations with Kafka, RabbitMQ for real-time data processing. Authored technical playbooks, sample code, and delivered workshops to client teams on container orchestration (GKE/EKS), monitoring (CloudWatch), and CI/CD. Integrated Highcharts and Chart Js for rich data visualization, enabling interactive and insightful dashboard experiences.