Led a cross-functional team in the development and implementation of profit management system, using Spring Boot, Camunda, and ELK - secured 4 banks as clients.Refined the system design to offer profit as a service from stored procedures - cut debugging time by 40%. Proposed the adoption of Mybatis as the ORM solution to maintain stable business logic and prevent re-implementation - reduced development time by 40%. Orchestrated the migration of a monolithic Java application to microservices architecture, resulting in a 40%+ decrease in response times and 50% increase in system scalability. Formed CI/CD pipelines for the profit management artifacts using SonarQuebe, Gitlab CI, and Docker - saved 10% of the team’s daily time and ensured code quality.

Revamped the system to use as a pension plan for enterprises - boosted active users from 45k to 80k in four months.Devised functionalities to consider user's risk appetite and auto ordering - enhanced order's size by 15%.Implemented logging and monitoring microservices, using Prometheus, Grafana, and Graylog - enhanced system performance and reliability, and doubled support capability.Revitalized real-time support services such as chat service and support panel APIs - saved 10-15% of the time for support and enabled the hiring of non-technical support staff.Engaged with a/sync SOAP, REST, and gRPC APIs and handled limitations - improved system performance by 5%.

Streamlined the payment process to diminish financial overhead and eliminate manual work for customers - raised a 1.5-4.5% contract's interest.Transformed the multi-deployed system into a multi-tenant one - decreased the support for customers by 30%.Restructured the system with RabbitMQ as a message broker, job queue, and socket queue - tripled the system’s PPS.Applied modern development considerations, auditing, logging, and monitoring - increased the customers’ trust and willingness to invest in the application development costs by 10% of primary budget.Invented contradiction finder/solver and abnormal-detector - eliminated manual work for contradiction audit by 70%.

Developed applications utilizing Eclipse SWT and Java Swing for meeting attendance, property management, and resort booking, attained an 85% reduction in in-person clientele for the HR amenities department.