I build applications with modern JavaScript. Whether it is frontend development with React, backend services with Node.js, or full-stack applications, JavaScript is at the core. I bring expertise in ES6+, TypeScript, async patterns, and JavaScript best practices to every project. Frontend JavaScript with React. Vue. or vanilla JavaScript for interactive user interfaces. Backend JavaScript with Node.js for server-side logic and APIs. Async JavaScript patterns - promises. async/await. event handling. streams. TypeScript integration for type-safe JavaScript across frontend and backend. JavaScript testing with Jest. Vitest. and Mocha for reliable. tested code. Module bundling and optimization with Vite. Webpack. and esbuild. ES6+ features - arrow functions. destructuring. spread operators. classes. modules. Package management with npm. yarn. or pnpm and dependency optimization. What is the difference between JavaScript and TypeScript?: JavaScript is flexible but error-prone. TypeScript adds type checking to catch bugs early. I use TypeScript for production applications and JavaScript for rapid prototyping. Should I learn JavaScript or jump to a framework?: Learn JavaScript fundamentals first - then frameworks like React are much easier. I can mentor your team on core JavaScript concepts. What about legacy JavaScript (ES5)?: I work with legacy code and gradually modernize it. Can add ES6+, modules, and modern tooling to existing JavaScript applications. How do you keep JavaScript performant?: Through bundle analysis, code splitting, efficient algorithms, and proper async patterns. Every JavaScript project targets performance from day one.