Seoul, Korea
I am a Full-Stack Node.js Developer with 8 years of experience, primarily working in startups where I have served as Lead Developer and CTO. My responsibilities have included web service development and project management. I prioritize code readability and reusability, enjoying the process of designing and evolving system architectures. I have experience in developing products using LLMs such as GPT and Claude, as well as building a RAG pipeline using Llama3, Ollama, and AnythingLLM I also have experience in blockchain technology, and built a product using smart contracts and nfts. Additionally, I have been involved in training development team members, creating coding education content on YouTube, and successfully managing a development outsourcing team to deliver various projects for different companies.
Web Frontend
React, Next.JS, Vue, Typescript
Backend
Node.JS, Java, Python, Rust
AI
ChatGPT, Claude, Llama, Fine-tuning, RAG
Cloud
AWS, GCP, Azure
Database
PostgreSQL, MySQL, MongoDB
Automation
Puppeteer, Pyautogui
Blockchain
Ethers, ThirdWeb, Solidity
Korean
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English
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co-Founder & CTO
Blackhoods Inc.
Mar 2023 - Jun 2024 · 1 yr 4 mos
Planned and developed the Wame, an AI character platform, leveraging advanced AI models including ChatGPT and Claude3, which were fine-tuned for optimal performance and communication. The platform allows users to create and interact with AI-generated fantasy characters.
Developed and maintained X2EALL (formerly known as p2eAll), a Web3 Play-to-Earn (P2E) games platform with a user base of 300,000.
Built and maintained Klaytn Blockchain Node as a member of Governance Council.
Built and maintained Havah Blockchain Node and made a partnership with Havah.
Secured seed funding from Kakao Investment, Lotte Ventures, and Alphanonce.
Technical Director
Kakao Krust Universe
Jun 2022 - Mar 2023 · 10 mos
Planned and developed Altverse, a Web3 DID (Decentralized Identity) and campaign platform. This full-stack development project focused on creating a marketing campaign platform based on Smart Contracts. The platform has since been merged with X2EALL.
Implemented features included an escrow function using Smart Contracts and reward-based campaigns utilizing ERC1155 and ERC20 tokens. To automate campaigns, integrated Twitter API and Discord bot functionalities.
Lead Software Developer & Technical Product Owner
Gollala Inc.
Jan 2021 - May 2022 · 1 yr 5 mos
Led full-stack development for the global fashion wholesale platform, Gollala, serving as both Lead Developer and Technical Product Owner (TPO).
As the first developer on the team, I launched the global commerce website, driving the company from an initial quarterly revenue of KRW 70 million to a business handling transactions worth KRW 1 trillion.
In the development domain, I primarily worked on the commerce frontend and backend using React and Node.js. Additionally, I designed MongoDB schemas and built and managed the infrastructure on Google Cloud Platform.
As the TPO of an agile organization, I managed the commerce team, partner team, and purchasing team, providing technical guidelines and facilitating collaboration with non-developers.
co-Founder & CTO
Erunlife Inc.
Apr 2019 - Jan 2021 · 1 yr 10 mos
Led the development and project management of Smallshim, a leisure curation platform. Responsible for the development of both the web application and backend systems, as well as the administrative site for business owners.
Despite showing excellent performance as an early-stage startup, winning top graduation honors in the Pre-Startup Package at Yonsei University and receiving the Geumcheon District Mayor Award, the business was closed due to the impact of Covid-19.
Software Engineer
Ubiquoss Inc.
Aug 2018 - Apr 2019 · 9 mos
Developed software for a body composition analyzer as an embedded software engineer. The project was based on a custom board from Texas Instruments. Implemented the frontend for the touch LCD screen using Python and Kivy. At the time, Kivy was in its early development stages, so I directly communicated with the original developer via email to resolve technical issues and advance the project.
Researcher (Contract)
JW Bioscience
May 2018 - Jul 2018 · 3 mos
Developed medical image processing software using C++ and MFC, focusing primarily on UI and image modifiction modules.
CEO
T&C Soft
Mar 2018 - Jul 2018 · 5 mos
Developed an AR game that uses location-based air polution, adopting a system similar to Pokémon GO. Implemented the AR functionality using Unity and Vuforia. Additionally, filed and registered a patent related to the AR game.
(Patent Info: DEVICE AND METHOD FOR PROVIDING GAME USING FINE DUST - 1020319750000)
Rutgers University (USA)
Bachelor’s Degree, Computer Science
Sep 2011 - Dec 2011
Yonsei University (South Korea)
Bachelor’s Degree, Computer Engineering
Mar 2016 - Aug 2018