Backend Architecture:Built scalable backend services from scratch using Express.js and NestJS, implementing RESTful APIs with WebSocket connections for real-time threat monitoring and live data streaming.
Database Design & Integration:Designed and optimized database schemas in MySQL and MongoDB, successfully migrating the application from dummy/test data to live database connections, ensuring 100% accurate real-time information display across all UI components.
Email Automation:Developed comprehensive email notification systems using Nodemailer with custom HTML templates, handling user verification, password resets, security alerts, and automated transactional emails.
Testing & Quality Assurance:Established robust testing frameworks using Jest and Supertest, writing unit tests, integration tests, and API endpoint validation achieving 85%+ code coverage and ensuring system reliability.
UI Integration & Optimization:Enhanced user experience by implementing loading skeletons, spinners, and conditional rendering during data fetch operations, eliminating dummy data placeholders and ensuring smooth transitions between loading and content states.
API Development:Created RESTful endpoints from scratch with proper error handling, input validation, middleware implementation for authentication, logging, and request/response formatting.
Performance Optimization:Optimized database queries, implemented indexing strategies, and added pagination/filtering, reducing API response times by 40% and improving overall system throughput.
Security Implementation:Integrated JWT authentication, rate limiting, input sanitization, and security best practices to protect against common vulnerabilities.
Code Quality:Participated in code reviews, followed clean code principles, and maintained comprehensive API documentation using Swagger/OpenAPI.
