● Created RESTful APIs, such as database CRUD manipulation, using Node.js, Express.js, Mongoose.● Implemented data pagination from the database on the backend using Node.js, Express.js + Mongoose.● Designed and implemented JWT-based access authentication in Node.js and Express.js routes with middleware.● Utilized interceptors in Node.js and Express.js to implement user verification and access control.● Implemented effective error handling mechanisms on server sides, providing clear error prompts based on error codes.● Used TypeScript to improve code safety and reliability, enhancing team development efficiency.● Conducted Node.js API testing using Postman during the development process and utilized Git for version control.● Wrote relevant unit test cases and developed based on testing objectives to achieve a test-driven development model.● Adhered to Agile development principles, ensuring successful completion of tasks at each stage and reporting issues and progress during team meetings.● Coordinated team tasks using Jira, confirming development progress, and utilized Figma to illustrate the workflow of features.● Implemented a caching mechanism using AWS ElastiCache to enhance server response efficiency.● Responsible for maintaining the system post-deployment on AWS, with knowledge of Lambda and S3 operations.

● Participated in the system architecture design, functionality division, and data flow analysis of the CRM system.● Built the necessary RESTful API and related utility functions for features using Express.js with Node.js, including authentication, data ETL, etc.● Created a microservice for customer clustering data analysis using Python.● Designed user and customer service business models under a document-based data model.● Used TypeScript in React to enhance code development efficiency and accuracy.● Built an inheritance component using the class component super method, improving development efficiency.● Implemented pagination logic for consumption history in customer consumption record API.● Built application redirection and navigation logic based on React-Router-Dom.● Used Mongoose to do CRUD operations on MongoDB.● Utilized Axios for HTTP requests, including operations such as GET/POST/PUT/DELETE.● Used AWS S3 and Node.js to handle file management for customer services file upload function.● Introduced a test-driven development model(TDD), targeting test case results during the project development phase for focused development.● Employed Git for version control, checking, and resolving version conflicts.● Implemented backend containerization through Docker, running services in virtual machines.● Made error-handling functions for displaying clear and readable error messages.● Adhered to Agile development principles, scheduling tasks based on progress, and providing regular reports on work progress and issue resolution during weekly meetings.● Responsible for post-deployment project maintenance. Communicated with users and adjusted program workflows based on user requirements, streamlining operation steps and improving efficiency by 10%.

● Developed an automated scraping script in Node + node-schedule to parse and extract error information from SQL Server operation logs.● Created a backend server using Node.js and developed RESTful APIs.● Utilized node-schedule to set up backend scheduled tasks for automatic log retrieval at regular intervals.● Processed and integrated scraped information using D3, and produced pure data for monitoring data visualization.● Implemented appropriate error-handling logic, with try/catch displaying error messages based on backend error codes to prevent application crashes.● Authored relevant development documentation, providing information on APIs and their usage methods.