Last updated: 2022. 09. 07.
Greetings!
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Hyunseung Jeon (전현승, 田賢承)
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Software Engineer interested in Web Frontend.
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Framework/Library — React, Redux, Redux-Saga, Apollo, StoryBook, Jest
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Type System — TypeScript, ReScript( Hindley–Milner Type System)
Hindley–Milner Type System)•
Enjoying Algorithm Problem Solving.
2000. 06. 22. Goyang-si, South Korea Work Experiences
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Project: "Greeting — Easy and Convenient HR Solution"
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Worked on SPA development using React and TypeScript.
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Performed GraphQL communication, server state management, client state management using Apollo Client, and tried to make the most of the optimization methods provided by the library, such as Query Batching and Caching.
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Made better use of TypeScript by actively using Utility Types including ReturnType, trying to apply various type systems such as Opaque Types (away from the structured type system).
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Actively used semantic tags, tabindex attraibute, etc. to improve web accessibility, and tried to apply conventions to in-house code.
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Became proficient in quick work communication using Jira and Slack, and tried to adapt to the rapidly changing startup culture.
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Solved countless “technologically challenging” problems, while significantly improving usability of application.
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Project: "Greeting Career"
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Initialized Next.js-based new project, while the legacy project had created with create-react-app.
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Wrote SSG + ISR compatible website.
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Actively contributed to the initial setup of the project, such as setting directory structure and bundling, specifying style libraries and conventions, automating ESLint when commit using husky, and setting CircleCI automatic build and deployment based on the branch strategy.
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Project: "Doodlin Design System"
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Actively contributed to the maintenance of the in-house design system which is using Sass.
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Restructured stories and wrote stronger UI tests in Storybook, so that tests can cover various situations, including edge cases.
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Experienced and solved various errors that occur in the process of bundling a project using Rollup and deploying it to npm.
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Project: "Presence — Drop-in live & async voice collaboration for remote teams"
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Worked on real-time collaborative desktop application development using Electron, React, TypeScript and WebRTC (Agora SDK).
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Normalized and managed complex state of application using Redux.
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Handled asynchronous API operations requiring real-time using Redux-Saga and its Event Channel.
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Bundled entire project using Webpack, and optimized/troubleshot bundling process by directly modifying webpack.config.js as needed.
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Functional unit testing with Jest and UI component testing with Storybook were conducted before production deployment.
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Managed project repository as a monorepo using Lerna.
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Project: "Illegal Twitch Streamer Detection using Machine Learning"
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Set up the PySpark (AWS EMR) environment myself, and performed data preprocessing, EDA, and plotting of raw data sets.
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Set up the AWS SageMaker environment myself, and performed the machine learning process with PyCaret and XGBoost.
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Learned various concepts and techniques used in the whole process of machine learning, such as Normalization, Oversampling/Undersampling, and Feature Vectorization.
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Project: A (Private)
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Built application which converts Microsoft Excel format data into `SQLite` database, using openpyxl. Admin page was served using Flask.
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Managed Python packages and virtual environments with venv.
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Project: B (Private)
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Implemented web-based bulletin board with JSP and MySQL without using framework.
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Added previous/next posts feature by directly implementing the doubly linked list data structure with Java. Additional features such as pagination were also directly implemented.
Honors and Awards
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2021.10 3th Daegu Big Data Analysis Contest — Public
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Honorable Mention · Team "스크류 드라이버" · Daegu Digital Industry Promotion Agency
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2021.10 ICPC World Finals Moscow (44th Annual World Finals of the International Collegiate Programming Contest)
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77th Place · Honorable Mention · Team "Catdriip"
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2021.05 2021 Daegyeong Region Collegiate Programming Contest
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1st Place · Software Education Center, Kyungpook Nat'l Univ.
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2021.03 ‘빅데이터 융합’ 아이디어 및 논문 경진대회 (2020)
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1st Place · Dept. of Data Convergence Computing, Kyungpook Nat'l Univ.
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2021.01 제1회 NH투자증권 빅데이터 경진대회 "데이터, 문화가 되다" — League 1. 알고리즘 개발 "AI야, 진짜 뉴스를 찾아줘!"
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본선 진출 · NH Investment & Securities
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2020.11 2020 Daegyeong Region Collegiate AI Programming Contest
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2nd Place (President's Award) · Kyungpook Nat'l Univ.
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2020.11 2020 ACM-ICPC Asia-Seoul Regional
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51st (ICPC 32nd) · Honorable Mention · Team "3mipil" · Ministry of Science and ICT
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2020.07 Non-curriculum Program Idea Contest
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3rd Place · Software Education Center, Kyungpook Nat'l Univ.
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2020.05 ~ 2020.12 Software Maestro 11th
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Ministry of Science and ICT
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2020.05 ~ 2022.04 Research Officers for National Defence 6th Cadet (Voluntary abandonment)
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Ministry of Science and ICT
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2020.06 2020 Daegyeong Region Collegiate Programming Contest
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3rd Place · Software Education Center, Kyungpook Nat'l Univ.
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2019.11 2019 Daegyeong Region Collegiate Programming Contest
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2nd Place · Software Education Center, Kyungpook Nat'l Univ.
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2019.11 2019 ACM-ICPC Asia-Seoul Regional
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19th (ICPC 11st) · Samsung SDS Special Award · Team "Catdriip" · Ministry of Science and ICT
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2019.09 ~ 2020.09 "코드 읽어주는 사람들" SW Experts
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Daegu Center for Creative Economy & Innovation
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2019.08 2019 Open Infra Development Competition
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Bronze Award · Team "메아리" · manTech Inc.
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2019.08 Korea Edutech Maker & SW Challenge 2019
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본선 진출 · Ministry of Education
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2019.05 2019 Daegyeong Region Collegiate Programming Contest
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2nd Place · Software Education Center, Kyungpook Nat'l Univ.
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2018.11 2018 ACM-ICPC Asia-Seoul Regional
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34th (ICPC 20th) · NAVER Special Award · Team "1gunpil2mipil" · Ministry of Science and ICT
Scholarship
Only academic/honorable scholarships are listed. Scholarships such as National Grant Type are excluded.
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2020.10 2020 School of CSE 'Dream and Design' Scholarship
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School of CSE, Kyungpook Nat'l Univ.
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2020.05 The 7th KNU Honors Scholarship
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(재)경북대학교장학회
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2020 ~ 2022 The National Scholarship for Science and Engineering
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Korea Student Aid Foundation
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Spring 2018, Fall 2018, Spring 2019, Fall 2019 Scholarship for Academic Excellence
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Kyungpook National University
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Spring 2018 Scholarship for Excellent Admission
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Kyungpook National University
Projects & Activities
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2020.05 ~ 2020.12 Project: "Excalibur: 비대면 강의 수강생-강의자 도우미 플랫폼" SW Maestro
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Worked as AI Engineer.
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Implemented Drowsiness Detection module using OpenCV.
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Implemented Keyword Extraction using TextRank.
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2020.05 ~ 2020.10 Research Project: "감시·정찰을 위한 딥러닝 기반 표적 인식 알고리즘 연구" Research Officers for National Defense
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Learned Basics of Computer Vision and Deep Networks for Classification and Object Detection.
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Implemented SSD, Retinex, etc.
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2019.09 2019학년도 전공 학습법 영상개발 사업 학습법 인터뷰 Data Structure, Data Structure Applications · Software Education Center, Kyungpook Nat'l Univ.
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2019.09 ~ 2019.10 코드 읽어주는 사람들 'React.js 실습' Group Study Instructor Daegu Center for Creative Economy & Innovation
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Instructed Group Study for React, from basics to building their own server with node.js + React.
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2019.03 ~ 2020.07 President of "Gori", Algorithm Problem Solving Club Kyungpook Nat'l Univ.
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Awarded during term: 2019.11 2019 SW전공동아리 경진대회 최우수상
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2019 ~ 2020 Operator of College Algorithm Contests Kyungpook Nat'l Univ.
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Worked as Problem Setter and Problem Reviewer for College Algorithm Contests.
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2020.10 ~ 2020.11 '슬기로운 컴학대회' Operator
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2020.10 ~ 2020.11 '2020 Goricon' Problem Setter & Problem Reviewer
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2019.08 ~ 2019.09 '2019 Goricon' Problem Reviewer
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2019 ~ 2020 Undergraduate Tutor School of CSE, Kyungpook Nat'l Univ.
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Assisted instructing several Undergraduate Courses.
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2021.03 2021-1 'Data Structure Applications' Tutor
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2020.03 ~ 2020.06 2020-1 'Algorithm Practice' Tutor
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2019.09 ~ 2019.12 2019-2 'Data Structure Applications` Tutor
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2019.06 ~ 2019.07 2019-S 'Python Programming' Tutor
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2018.11 ~ 2018.12 Assistant Instructor at '소프트웨어로 나르샤' Program Daegu Software High School
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Taught basic HTML/CSS and advanced JavaScript to high school students.
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Instructed Simple Face Recognition Project, which uses WebCam via MediaDevices API and handles asynchronous requests.
Education
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2018.03 ~ 2022.02 Kyungpook National University Daegu, South Korea
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Bachelor's degree, Computer Science and Engineering
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Major GPA: 4.03 / 4.5
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2015.03 ~ 2018.02 Haengshin High School Goyang, South Korea
Other Experiences
Online Education
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2020.08 ~ 2020.11 Udacity Deep Learning Nanodegree
Open-source Contribution
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type-challenges — Collection of TypeScript type challenges with online judge
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Translated TypeScript Type Challenge problems into Korean.
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misskey — An interplanetary microblogging platform
An interplanetary microblogging platform ◦
Fixed a bug where the Cmd + Enter key combination did not work in the Messaging room.
Toy Projects
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2021.02 homete!
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React Next.js TypeScript Firebase
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2020.07 "いちかのっ！BEMANI超じゃんけん大会2020" 오토 봇
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node.js Puppeteer serverless
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2020.03 알고리즘 콘테스트 일정 슬랙 봇
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Python BeautifulSoup serverless
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Undergraduate Projects
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2020.09 ~ 2020.12 COVID-19 Helper Application ITEC402 Capstone Design Project 2
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Developed Android Application using Kotlin.
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Used MPAndroidChart library and XmlPullParser to draw Confirmed cases plot, Released from Quarantine plot.
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2020.03 ~ 2020.06 Multithread 기반의 다중접속 채팅 프로그램 EECS312 Network Programming
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Developed Winsock-based Console Chat Application.
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Supports Multiple Connection, 1:1 Chat, etc.
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2020.03 ~ 2020.06 시간제 일자리 공유 플랫폼 개발 및 업그레이드 ITEC401 Capstone Design Project 1
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Developed Android Application using Kotlin.
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2019.09 ~ 2019.12 학생 경력 관리 시스템 COMP224 Software Design
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Developed CRUD Application with Python GUI.
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Learned and applied basics of Software Design (Software Development Methodologies, Requirement Definition, Functional/Structural/Behavioral Modeling, Class Design, etc.)
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Worked on Database Design and Database Management.
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2019.09 ~ 2019.12 Battle Typing - 대전형 타자연습 게임 ELEC462 System Programming
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Developed Console-based Typing Practice Game.
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Supports Multiplay, Online-Ranking System, etc.
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Learned Linux Socket Programming, Signal Handling, Multithread Programming, Console Programming using ncurses, etc.
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2018.09 ~ 2018.12 국내 대학교들의 '타대학 학점교류' 협정 현황을 통해 보는 대학 간 관계와 각 대학의 특성 CLTR264 Social Networks
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Worked on Graph Network Visualization Project using UCINET.
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Learned basics of Graph Theory, Network Theory.