• Built a backend for a mobile game with 1M+ users

• Led the design and development of REST APIs using Java, Spring, Redis, AWS, and MySQL

• Implemented Redis to establish an asynchronous message queue, reducing latency and improving data accuracy

• Improved performance latency by 90% through optimization of large-scale computations

• Automated data uploads to S3, saving 3 hours of developer labor weekly

• Established a test pipeline conducting unit testing (JUnit), integration testing (Mockito), and documenting test cases

• Collaborated with front-end engineers and designers in a Scrum environment to meet product release deadlines

• Developed a Windows application for copy trading in the stock market

• Established connectivity between securities firms' APIs and the FreeCap platform using C++ and MFC

• Increased user base by 25% through integration of additional APIs and new trading categories

• Developed a Risk Management System, reducing losses by 60%

• Implemented CI/CD pipelines to streamline development and collaboration