Avatar of 黃怡瑄(Kouisen).
黃怡瑄(Kouisen)
Backend Engineer
Profile
Posts
0Connections
Print
Avatar of the user.

黃怡瑄(Kouisen)

Backend Engineer
Java Spring Boot | JLPT N1 | TOEIC 885 Highly analytical Backend Engineer with a background in Financial Services, bringing a "Zero-Error" mindset and rigorous logic to software engineering. Specialized in Spring Boot ecosystem, with a deep-dive approach to framework internals (e.g., Spring Security Filter Chain) to build robust, scalable RESTful APIs. While specializing in backend architectural patterns like CQRS, I also possess solid front-end proficiency (HTML/CSS/JS) to ensure seamless API integration and UI Implementation. 【Technical Blog (Traditional Chinese)】 https://medium.com/@kouisengetnews
Bank of Taiwan
Logo of the organization.
National Taiwan University of Science and Technology
臺中市, 台灣
Taiwan

Featured Resume

Uploaded on Feb 4th 2026

Professional Background

  • Current Status
    Unemployed
  • Profession
    Java Developer
    Back-end Engineer
    Full Stack Development
  • Fields
    Banking
  • Work Experience
    2-4 years (Less than 1 year relevant)
  • Management
    None
  • Skills
    Java 17+
    Spring Boot 3
    Spring Security 6
    Spring Data JPA
    Spring MVC
    HTML5
    CSS3
    JavaScript
    MySQL
    Git
    GitHub
    CQRS pattern
    Layered Architecture
    Defensive Design
    Hibernate Validator
    Lombok
    MapStruct
    Postman
    Eclipse
    Maven
  • Languages
    Japanese
    Fluent
    English
    Fluent
  • Highest Level of Education
    Bachelor

Job Search Preferences

  • Current Status
    Ready to interview
  • Desired Job Type
    Full-time
    Interested in working remotely
  • Desired Positions
    Software Engineer
  • Desired Work Locations
    Taipei City, Taiwan
    Hsinchu City, Taiwan
    Taichung City, Taiwan
  • Freelance
    Part-time freelancer

Work Experience

Junior Banking Officer

Bank of Taiwan
Full-time
Jul 2023 - Mar 2025
1 yr 9 mos
Taipei City, Taiwan
Deposits, Foreign exchange , Safety Deposit Boxes

Junior Banking Officer

Chang Hwa Bank
Full-time
Oct 2022 - Apr 2023
7 mos
Hsinchu City, Taiwan
Deposits - Financial Operations & Compliance: Managed high-stakes transactions in a zero-tolerance-for-error environment. Ensured 100% compliance with complex regulations to mitigate operational risks. - Access Control & Authentication: Enforced Multi-Factor Authentication (MFA) protocols for vault access, fostering a deep understanding of Identity and Access Management (IAM) and strict authorization. - UX & Logic Optimization: Analyzed and optimized business logic in daily workflows to enhance efficiency. Gained frontline UX insights to design more intuitive, user-centric system processes. - Defensive Design Mindset: Translated the banking "Double-Check" culture into Defensive Programming. Applied multi-layered validation (DTO/Service layers) to ensure data integrity and system robustness.

Education

Logo of the organization.
Bachelor of Business Administration (BBA)
Department of Business Administration
2018 - 2022
Description
Yokohama City University Yokohama, Japan School of Economics and Business Administration | Exchange Program (2022-04 ~ 2022-08)