Develop web applications using MongoDB, Express, React, and Node . js . Collaborate with cross-functional teams to define, design, and ship new features . Write clean, maintainable, and efficient code . Design and implement RESTful APIs . Integrate third-party APIs and libraries . Troubleshoot and debug applications . Optimize applications for maximum speed and scalability . Write unit and integration tests to ensure code quality . Participate in code reviews and contribute to the development of best practices . Excellent communication skills, and be comfortable working in an Agile development environment .