About

Johnson YuKai Wang

Skills Summary

Languages

• Familiar: Java, Go
• Experienced: Python, C++, Typescript

Frameworks

• Spring Boot, Angular

Databases

• MySQL, PostgreSQL, MongoDB

Tools

• Git, Docker, Kubernetes, CircleCI

Cloud Platforms

• AWS, GCP, Azure, Heroku

Professional Experience

DBS Bank - Taipei, Taiwan

Software Engineer - Consumer Finance Tech Team (July 2022 – Present)

• Developed financial systems using Java Spring Boot for Consumer Finance Taiwan API Gateway and Sell/Spend By Installment Engine.
• Contributed to the Citibank Migration Project, developing web interfaces, implementing caching tables, and archival features.
• Onboarded encryption service for 20+ microservices, enhancing security.
• Assisted in analyzing 50+ UAT defects, implemented production incident fixes using Python.
• Improved code quality by implementing JUnit 5 test cases, increasing test coverage from 0% to 80%.
• Collaborated on investigating and resolving 20+ production incidents.

Shoalter Technology Ltd. - Taipei, Taiwan (Member of HKTV)

Software Engineer - Backend/Android Team (Sept 2021 – July 2022)

• Developed unmanned shops, including e-commerce and stock management systems, using Java Spring Boot and deploying on GKE.
• Improved SQL query performance and maintained staging environments in AKS.
• Ensured data security by masking and mocking production customers’ sensitive data.
• Studied Android development and React Native as an App team member.

Education

Chung Yuan Christian University - Sept 2017 - June 2021

Bachelor of Computer Science

• Courses: C++, Compilers, Data Structures, Algorithms, Operating Systems, Computer Network
• Project: CYCU Assistant (Python/MongoDB/Heroku/Dialogflow/Line Bot API)