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• Web Application Development: Design, develop, and maintain full web applications, ensuring high quality, performance, usability, and innovation; • Frontend Development: Build attractive, responsive user interfaces using front-end technologies such as HTML, CSS, and JavaScript, and modern frameworks like Vue.js, React, Angular, or Next.js; • Backend Development: Design, develop, and optimize backend architectures, including servers, APIs, and databases to support application functionality. Use programming languages and frameworks such as Node.js, Python, Django, or others as appropriate; • Data and API Integration: Design and implement complex integrations with third-party APIs and legacy systems, ensuring efficiency and scalability; • Testing and Debugging: Develop and maintain unit and integration tests to ensure application stability and reliability. Debug and resolve issues as needed; • Information Security: Ensure the security of data and transactions by implementing and overseeing security best practices; • Team Collaboration: Work closely with designers, front-end developers, and other team members; act as a mentor to less-experienced developers; • Maintenance and Updates: Monitor and maintain existing applications, implementing updates, bug fixes, and improvements as necessary; • Database Modeling: Create and optimize database models, ensuring efficiency, scalability, and data security.