Provided technical direction and guidance, ensuring the team's technological decisions aligned with the company's long-term strategy and objectives.Led or participated in system architectural design, ensuring its scalability, reliability, security, and performance.Ensured code quality within the team, offering feedback and suggestions through code reviews.Collaborated closely with other departments or teams, including front-end developers, designers, and product managers, to ensure back-end systems met their needs.Participated in or managed the allocation and administration of technical resources, including cloud servers, databases, and other back-end resources.Ensured a smooth continuous integration and deployment process.Took part in the interviewing and evaluation of back-end developers, ensuring team quality.

Developed a real-time ride-hailing software service using Node.js, and leveraged containerization technologies like K8s and Docker to distribute traffic loads in a microservices architecture.Utilized monitoring tools like Grafana and ELK to diagnose performance bottlenecks based on metrics such as CPU, I/O, connection count, and worker performance; optimized T-SQL query performance accordingly.Integrated real-time data from IoT boxes and vehicle devices using CosmosDB.Implemented caching using Redis and utilized locking mechanisms to prevent race condition errors.Deployed and migrated databases using Sequelize and Umzug ORM tools.Integrated with CTBC (中信) payment gateway and ECPay's (綠界) invoicing system to facilitate cash flow and accounting functionalities.Incorporated various third-party services including Google Maps, Twilio, and SendGrid to enhance software capabilities.Implemented CI/CD and version control processes using Jenkins and integrated deployments to Microsoft Azure cloud.

Implemented the backend of a vehicle rental system using MongoDB and the Express Node.js framework.Constructed the front-end of a vehicle management system using React.js, including features such as financial management and vehicle monitoring.Performed manual deployment of both front-end and back-end using Microsoft Azure.

Integrated open source tools and utilized web scraping techniques to develop a system that allows users to inquire about parking spaces and parking fees through a Line bot.Collected signals from GPS trackers and developed a vehicle management software to monitor real-time locations.

Responsible for software testing tasks; utilized dozens of mobile phone brands to test app functionalities on both iOS and Android platforms.Authored test cases based on business logic, collaborated with engineers to clarify issues, and executed tasks assigned by the supervisor.