Qifan Chen

• Collaborated with a team of 5 engineers to develop and deploy a new feature for the company's main product, resulting in a 15% increase in user engagement.
• Using Java and Spring Boot to implement and optimize backend services, such as user login management and access control, API development, the system run-time performance has increased by 8%.
• Conducted comprehensive testing using JUnit for unit testing and Selenium for integration testing, ensuring both individual component functionality and overall application reliability.
• Participated in code reviews using Git and provided constructive feedback, enhancing code quality and team collaboration.

• Built the backend with PHP Laravel and MongoDB, implemented front-end logic with Python, and used OpenAI API to create an interactive Discord chatbot with advanced NLP and dynamic image generation, enhancing user engagement.
• Developed a fishing game within the bot that includes buying, fishing, and inventory management, boosting user interaction.
• Designed a flash sale system with distributed transactions and message queues, improving efficiency for item management.
• Implemented rate limiting and risk control measures, reducing malicious activity by 67% and improving platform integrity.
• Deployed and managed the entire application on AWS, ensuring high availability, scalability, and security.

• Designed and implemented static web pages using HTML, CSS, and JavaScript, ensuring a user-friendly experience while
adhering to brand guidelines.
• Developed and deployed security measures including token-based authentication to prevent fraudulent activities like rapid
repeat orders by the same customers, enhancing transaction security.
• Improved help desk response times by efficiently prioritizing support requests based on urgency and impact on business
operations, resulting in a 18% reduction in average resolution time.