**Programming Languages:** JavaScript (ES6+), TypeScript, HTML5, CSS3**Frontend:** React.js, Vue.js, Next.js, React Native, Redux Toolkit, Zustand, React Router, Hooks, Context API, Vite, Webpack, Tailwind CSS, Bootstrap, Sass/SCSS, Material UI, Flexbox, CSS Grid, Responsive Design, DOM Manipulation, Web Workers, Service Workers, WebSockets, Server-Sent Events (SSE)**Backend:** Node.js, Express.js, REST API, RESTful APIs, Webhooks, Middleware, JWT, OAuth 2.0, Socket.IO, SIP, WebRTC, HTTP, HTTPS, CORS, Server-Side Rendering (SSR), API Integration**Databases:** MongoDB, Mongoose, MySQL, PostgreSQL, SQLite, Redis, Firebase, Firestore, SQL**AI & LLM:** Ollama, Claude (Anthropic), Google Gemini API, OpenAI API, LLM Integration, Prompt Engineering, AI Agents, Function Calling, Structured Outputs, AI-powered Automation, Speech-to-Text, Audio Processing, Transcription**Authentication & Security:** Firebase Authentication, JWT Authentication, OAuth, bcrypt, Password Hashing, Session Management, Role-Based Access Control (RBAC), Environment Variables**JavaScript & Data Processing:** Async/Await, Promises, Closures, Scope, Event Loop, ES Modules, Error Handling, JSON, Regular Expressions, Data Validation, Zod, Joi, express-validator**Integrations & Communication:** SIP, VoIP, WebRTC, Webhooks, REST API Integration, Third-Party APIs, Telephony APIs, Call Processing, Call Recording, Google Analytics**Tools & Development:** Git, GitHub, npm, pnpm, Yarn, Postman, ngrok, Docker, Linux, Bash, CI/CD, GitHub Actions, ESLint, Prettier**Architecture & Development Practices:** MVC, Modular Architecture, OOP, Functional Programming, SOLID Principles, Design Patterns, Asynchronous Programming, Debugging, Performance Optimization**Additional Technologies:** File Uploads, Streaming, Audio Processing, E-commerce, Shopping Cart Logic, Product Filtering, Email Verification, Firebase Admin SDK