5+ years of experience in front-end development, with a focus on complex single-page applications (SPAs) Expert-level proficiency in JavaScript/TypeScript, React, and modern CSS Strong understanding of web performance optimization techniques, scalability, and security Experience with front-end testing frameworks (e.g., Jest, React Testing Library, Cypress) 3+ years of experience in backend development, with a focus on building scalable, distributed systems Proficiency in one or more modern programming languages (e.g., Node.js, Java, Python)