David Yun
Durham,NC
Summary
Detail-oriented and innovative software developer with over 8 years of experience in all phases of enterprise-level product life cycles. Expertise in developing, implementing, and supporting Angular web applications using the Java Spring and Spring Boot frameworks. Proven problem-solving skills and effective decision-making abilities during development and support phases ensure consistent achievement of project goals and deadlines. Proficient in a variety of programming languages, including TypeScript, JavaScript, Java, JSP, Python, and SQL, with a strong foundation in programming concepts such as RESTful architectures, object-oriented programming, and multithreading.
Overview
1
1
Language
7
7
years of professional experience
Work History
Consultant
CGI Federal
08.2021 - Current
- Design, test, develop, and maintain Java applications and data flows for the Office of Chemical Safety and Pollution Prevention (OCSPP) and Toxic Substances Control Act (TSCA), utilizing tools such as Angular, Javascript, Java, Java-Spring, and Hibernate.
- Collaboratively work through all cycles of the Software Development Life Cycle (SDLC), including design, implementation, documentation, testing, release, operations and maintenance, etc.
- Manage application deployments using GitHub Actions for CI/CD automation, reducing manual release overhead.
- Write unit tests to ensure application reliability and resolve production bugs, supporting active users across federal agencies.
- Working collaboratively using Agile methodologies and adhering to the CMMI guidelines
- Promptly responding to JIRA tickets, updating them to contain detailed and useful information consumable for other team members
- Building relationships with management while sharing progress of projects, raising issues and concerns as well as seeking advice
- Evaluated program effectiveness, providing strategic recommendations for continuous improvement in compliance efforts.
Developer
Fidelity Information Services, FIS
07.2019 - 09.2021
- create and evaluate Java-based web applications leveraging JSP, JavaScript, Spring, and Spring Boot frameworks functioning on Tomcat web servers
- Identify and resolve various security vulnerabilities and risks across 1000+ issues through Veracode's static analysis on legacy Java applications alongside QA and development teams.
- respond promptly to client support requests on Java-based web applications, minimizing product downtime
- Streamlined crontab management across 10+ applications through development of database-implemented application scheduler that automates Linux shell script deployment
- Accelerate production process through automation of build and deployment using Jenkins and Git
- Establish referable sources and improve insights for quality control through documentation and visualization of 12+ UML process flows and database model diagrams for existing applications.
Education
B.A. - Computer Science
University of North Carolina At Chapel Hill
05-2019
B.S. - Information Science
University of North Carolina At Chapel Hill
05-2019
Skills
- Full Stack Development
- Java Spring
- JavaScript
- Angular
- HTML
- CSS
- SQL
- PostgreSQL
- GitHub workflow deployments
- Object-oriented programming
- Agile development methodologies
- Performance optimization
Languages
Korean (fluent)
Industry expertise
Financial
Government Contracting
Qualifications
Java (Java EE, Spring), JSP, JavaScript, TypeScript (Angular) Python, C, HTML, CSS, XML, YAML, JSON, SQL, Bash
Tools & software
Intellij Ultimate, Eclipse, Adobe Dreamweaver, SQL Developer, PostgreSQL, Jenkins, GitHub, Microsoft Azure, Atlassian Jira, Confluence, MS Visio
Environments
Windows 8/10/11, Linux, macOS
Timeline
Consultant
CGI Federal
08.2021 - Current
Developer
Fidelity Information Services, FIS
07.2019 - 09.2021
B.A. - Computer Science
University of North Carolina At Chapel Hill
B.S. - Information Science
University of North Carolina At Chapel Hill