Resume

Dang Hyeona

Backend developer building shareable systems

I build and operate Java/Spring Boot servers for BI and data portals. I structure requirements into APIs, data flows, and deployment-ready features.

Developer profile photo of Dang Hyeona

Experience Total 3 yrs 8 mos

2024.01 - Present

(2 yrs 6 mos)

Full-time

Bigxdata Data Solutions Team / Senior

BI and data portal server developer

  • Developed server-side features for Java/Spring Boot-based BI and data portals
  • Led the initial implementation of a DBMS management module in a subscription-based multi-module solution
  • Maintained the main hub and reflected customer operation conditions into server functions
  • Handled verification, issue reproduction and fixes, deployment, monitoring, security checks, and EOS response
  • Tech: Java, Spring Boot, JPA/MyBatis/QueryDSL, MySQL/MariaDB/Oracle, Swagger

2021.12 - 2022.11

(1 yr)

Contract freelance

SSAFY Development Operation Group / Project Practice Coach

Project coaching and practice operation for SSAFY 6th and 7th trainees

  • Supported requirement organization, specifications, and development direction feedback
  • Created guidance materials and live demonstrations for server deployment and project operation

2019.07 - 2019.08

(2 mos)

Summer intern

ETRI / Research Intern

Video background removal editor development using OpenCV and CNN

  • Developed a frame-based manual editor using GrabCut and a CNN-based automatic editor
  • Implemented a checker to measure editing time reduction and automatic editing performance
  • Tech: Python, Tkinter, OpenCV, GrabCut, NumPy, Keras

Skills & Tools

Backend

Java, Spring Boot, JPA, MyBatis, QueryDSL

Database

MySQL, MariaDB, Oracle

API & Collaboration

Swagger, Git, Jira, Confluence

AI-assisted Development

Requirement structuring, Code review, Documentation, Test perspective review

Projects

2021.10 - 2021.11

Safers, environmental and animal protection metaverse

Metaverse-Web / Team of 5 / Team lead, backend, CI/CD, presentation

  • Led the team and handled backend APIs, CI/CD, ML-based mission classification, and presentation
  • Reviewed service direction based on communication with the National Institute of Ecology and IUCN
  • Result: SSAFY autonomous project class 1st place and national final selection / Java, Spring Boot, JPA, MySQL, AWS, Jenkins

2021.08 - 2021.10

Motion Pose Node&Flow

Open Source / Team of 5 / Team lead, frontend, backend, presentation

  • Led the team and handled the hand detection part, model-applied screen, and presentation
  • Published motion recognition nodes to npm and the Node-RED Library
  • Result: SSDC Wireless Business Division project 1st place, Samsung Automation Studio PR merged / Node.js, Node-RED, MediaPipe

Education

2021.01 - 2021.12

Samsung Software Academy For Youth 5th

Completed with excellence, top 5% among 750 trainees nationwide

2016.03 - 2020.02

Inje University, B.S. in Computer Engineering

College of Software, Computer Engineering / GPA 4.32, major GPA 4.4

Awards

2021.12

SSAFY Excellent Graduate

Samsung Electronics / Top 5% of 750 trainees. Includes three class project wins, a national final selection, and 1st place in the SSDC MX Division

2020.02

Outstanding Graduate, Computer Engineering, 36th Commencement

Inje University College of Software Dean's Award / Graduated second in the department

2019.12

Korea-China-Japan Global Capstone Design Silver

Non-contact sensor-based mouse pointer control project

2018 - 2019

National Science and Engineering Scholarship

Two-year national scholarship for science and engineering students / full tuition support for 4 semesters

Activity

2022.12 - Present

DND Developer x Designer Union Development Organizer

Development part operation and project feedback support for a nonprofit IT organization

2021.11.17 - 2021.11.18

Samsung Software Developer Conference 2021 Session Speaker

Presented an open source contribution experience with Samsung Electronics Wireless Business Division, now MX Division

Certifications

2023.09

Engineer Information Processing

National technical certification overseen by MSIT and administered by HRDK

© 2026 Dang Hyeona. All rights reserved.

Detailed technical experience is managed separately and can be provided when needed.

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Last updated 2026.06.16 KO EN
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