- System architecture with Springboot+Mybatis+nginx - Online Issue Tracking with Elasticsearch - Multi-thread and Redis Lock Implementation to prevent duplicate submissions - Utilizing Kafka platform for processing user financial transaction data

- Develop microservices with Spring Boot, PostgreSQL, Redis, and Nginx - Use Spring Security + JWT to do API authentication and authorization - Control of code version with GitLab and use CI/CD to automatically set up UT test and deployment services to Azure - Transmission of large files and handshake between services through gRPC - Use the Kafka platform to process transaction data of company personnel - Use WebSocket for timely notifications - Docker container service for Deploying, Deploying, Managing, and Tracking Logs

- Backend service development based on springboot - Using ORM such as Mybatis / jpa - Use Restful, ActiveMQ, SOAP for application communication - Git version control - SAP tool MII development