Front-end and hybrid app developer with 3 years of experience Haymarket NSW 2000 [email protected] +61 (Australia) 0451 087 592 linkedin: https://www.linkedin.com/in/yong-tae-kim-658572244/

#Positive #Proactive #Challenging

Brief Introduction

Frontend-focused Software Developer with 3+ years of experience building and deploying scalable web and mobile applications using React and React Native. Experienced in developing and integrating RESTful APIs, deploying Dockerized services on AWS EC2, and implementing CI/CD pipelines with GitHub Actions. Strong background in performance optimization, secure authentication systems, and cross-functional collaboration. Passionate about building reliable systems that improve operational efficiency and user experience.

Career

Lagardere AWPL

Retail Sales Assistant

April 2023 to Present

IT Support & Customer Service

• Delivered high-quality customer service in a fast-paced retail environment while providing in-store IT support.
• Troubleshot POS systems, printers, and peripheral devices, minimizing downtime and ensuring seamless operations.
• Assisted a diverse range of international customers while managing technical responsibilities, demonstrating problem-solving and communication skills.

Private Coding Tutor

Tutor

04/2023 - Current

Python

Students got D(Distinction) and C(Credit) marks from Python final exam who didn't have IT background.

• Delivered structured training in JavaScript and Python fundamentals, covering syntax, debugging, performance optimization, and industry best practices.
• Designed project-based learning modules simulating real-world development scenarios using Git-based collaboration workflows.
• Taught Natural Language Processing concepts using BioBERT and SpaCy, including named entity recognition (NER) and large dataset handling.
• Guided students in memory management techniques and performance optimization strategies through hands-on coding exercises.

Bigsol

Hybrid Mobile App Developer

07/2022 - 12/2022

The Ssen Card mobile app

The Ssen Card mobile app - 1M+ Financial Multi-Platform(android, iOS) Mobile App link: https://play.google.com/store/apps/details?id=com.bigsol.topcard&hl=ko&gl=US

• Implemented core CRUD functionality for community features in a 1M+ user financial mobile app, increasing user engagement by 25%.
• Developed interactive financial visualization features enabling users to compare credit card benefits and optimize spending decisions.
• Integrated Google Firebase Analytics and Bugsnag for real-time performance monitoring and user behavior tracking.
• Implemented biometric authentication and encrypted data storage to enhance application security and protect sensitive financial information.
• Refactored legacy React Native components and participated in structured code reviews, reducing application errors by 30% and improving code maintainability.
• Collaborated with backend engineers to integrate RESTful APIs and ensure reliable data exchange between mobile clients and server systems.

ICTK Holdings

Software Engineer

01/2021 - 07/2022

NFT Mobile Wallet

Development of NFT wallet React Native App

Planning, design, and development of Mobile USIM-PUF NFT cold wallet React Native app

Web3 sign transaction with android native module

Implementation of blockchain backend local test net

Stack used

React-native, javascript, java(native module), github, truffle & ganache with docker

FOTA 2FA login Android App

Development of FOTA 2FA login android App

App screen, login, TOTP & USIM-PUF auth, push handling

Synchronization of OTP authentication values within the activity using Coroutine Job

Encryption/decryption using Keystore and Encrypt shared preferences, ecdsa signature verification

Stack used

Kotlin, java

FOTA Function Development and Maintenance

Front-end development and maintenance of FOTA services

Maintenance of FOTA services, bug fixes, and implementation of tab functions

Optimization of script reduced initial loading network costs by 60%

Accelerate loading speed of email authentication page improved by 20 times faster

Automated batch modification of 50 pages of code

Stack used

Javascript, jQuery, Java, git, docker, AWS EC2

PQC 2nd Project Development Participation

Government New Deal Project PQC 2nd Project

Management of EC2, CICD, React-native mobile App maintenance, and Java-Spring boot administrator page development

Stack used

React-native, Javascript, Java, git, docker, AWS EC2

Internal Markdown Wiki Blogging

VuePress Blog

Conversion of markdown files only wiki to VuePress blog

Automated menu navigation using Python

Stack used

VuePress, python, docker

Internal Seminar

Fota FrontEnd Analysis

Docker & docker network

CI & CD

Team collaboration tools

Electron.js

Android security

Maintenance Management System Development

Development of a bulletin board-type system for maintenance requests and progress sharing

Stack used

Spring boot, Java, jQuery, SVN

Education

Skills

Front-end Development: React, JavaScript, Vue.js, jQuery, HTML5, CSS3, Bootstrap

Mobile App Development: React Native, Java (Android), Kotlin (Android)

Tools/Technologies: Git/GitLab/GitHub, Jira, Docker, AWS EC2, RestAPI, Flow (typed-javascript), Truffle & Ganache, Android Studio, Spring Boot

Additional Skills: Agile Development, UI/UX Design, Cross-platform Development, Test-Driven Development (TDD), CI/CD (Continuous Integration/Continuous Deployment), Debugging and Troubleshooting, Data Analysis and Visualization

Portfolio

https://ista1024-nextjs.vercel.app/