German-Chinese online dictionary, https://www.mydict.comFrom 2005 to the present, I have single-handedly developed a comprehensive online dictionary project, initially used PHP and transitioned to Ruby on Rails after 2014.• Managed full-stack development independently, including back-end, responsive front-end, database design, cybersecurity, code deployment, performance optimization, and search engine optimization (SEO).• Developed a robust system comprising over 24,000 lines of code, attracting over 20,000 registered users and achieving 10 million monthly visits, making it the largest online Chinese-German dictionary at the time.

https://iot-venture.comDeveloped and optimized a scalable, high-availability system using Ruby on Rails and Node.js. Leveraged AWS and Scaleway cloud architectures to efficiently process over 6 million IoT tracker records daily. •In my technical work, I achieved: - API development for front-end. - Refactored a Sidekiq worker to facilitate the bulk insertion of tracker records into the database, achieving a tenfold reduction in processing time. - Implemented asynchronous processing in Node.js to improve the existing system that receives UDP packets and pushes them into multiple Redis Cluster queues. By addressing the issues of BigKey and HotKey in Redis Cluster, the data collection process was greatly optimized. - Enhanced the tracker trip generation algorithm by handling special cases and expanding test coverage, significantly improving reliability and reducing computation time. - Utilized monitoring and observability platforms such as elastic.co and sentry.io to identify and resolve bottlenecks and exceptions. - Assisted the company in migrating a portion of our architecture to AWS, a strategic move designed to significantly enhance the stability and reliability of our system. - Initiated comprehensive discussions on efficiency and dependability. As a result, I proposed a robust strategy for distributed deployment and backup, specifically designed to prevent single point failures and significantly enhance the resilience of our system.• Facilitated cross-functional collaboration among diverse teams, including firmware, mobile app, react front-end, and back-end, to drive project success and streamline processes.• Collaborated closely with non-technical stakeholders such as the service team, Scrum Master, and Product Owner, to translate technical concepts into actionable insights, ensuring project alignment and successful delivery.• Mentored new and junior team members, and conducted code reviews.

https://www.ni.com/diadem• Developed and maintained the VIEW, ANALYSIS and REPORT modules of DIAdem, a desktop software similar to Tableau that streamlines data processing and visualization for efficient root-cause analysis.• Utilized Azure DevOps to streamline project management and enhance collaboration through effective CI/CD pipelines, automated testing, and comprehensive work item tracking. • Participated in leadership training and successfully applied the skills to project management of the new Bird's Eye View feature, achieving significant success and making it a unique selling point of the annual software release.• Refactored legacy code to achieve low coupling, encapsulation, and modularity, and completed comprehensive testing to ensure code reliability and maintainability.• Worked closely with high-profile clients, including Mercedes-Benz and Toyota, to understand their requirements and deliver robust and customized software solutions.• Consistently outperformed competitors by incorporating innovative features into the software, earning frequent commendations from the CEO at annual meetings, and was invited to speak at NI Tech conferences.

https://www.zs-ug.deI was responsible for the development and maintenance of the company website, ensuring its optimal performance and user experience.Additionally, I developed a customer information management system for Windows using C#. This system managed both personal and corporate customer data, as well as a variety of health check indicators. My role involved designing, coding, testing, and maintaining this system, providing a comprehensive solution to manage customer information effectively and efficiently.

I initially developed a solution using Microsoft Access and VBA to manage and analyze financial data. The system was designed to generate comprehensive reports, thereby enabling the leadership team to make informed investment decisions based on reliable data insights.Recognizing the need for a more automated and convenient solution, I later developed a Content Management System (CMS) using PHP and MySQL. This CMS was specifically designed to manage financial data more efficiently. After the data was processed and analyzed, the results were immediately visualized and displayed on the website's front end in the form of charts. This immediate representation of data allowed for quick and informed decision-making.In this role, I demonstrated my ability to evolve and adapt solutions based on the company's changing needs.

Conducted testing of motherboards and repair of HP/Compaq desktops, achieving excellent performance, and was promoted to team leader after one year due to outstanding performance.Developed and standardized SOPs for motherboard testing, enhancing process consistency and efficiency.Developed an automated installation system for the Windows operating system within the motherboard testing department, reducing installation time from one hour to just a few minutes, significantly enhancing departmental productivity and efficiency.Designed and implemented a comprehensive production data management system using Visual Basic (VB) and Microsoft Access. This system tracked various aspects of the production process, including employee work hours and overtime, as well as barcode scanning and tracking on assembly line components.The system streamlined the management of production data, improving efficiency and accuracy in operations. It provided a centralized platform for tracking labor and production metrics, enabling better resource management and monitoring of production activities.