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I got several aliases, and "jooncco" is the one that I use when I do develop and build things. I started my career as a back-end engineer at LG CNS, pretty awsome company to start career, and found out I could be the full-stack engineer that any team would LOVE to work with. I've led many business critical projects to success, ranging from small to big scales. Check out the details here.
Full Stack Engineer
Solutions Architect
Flutter Developer
Quant Enthusiast
Production Experience
*Note: These projects were completed for my clients during my tenure at LG CNS.
Aug 2024 - Now
A mobile application for electricity meter reading, capable of image based intelligent meter reading.
Contributions:
- Designed architecture of prototype web application and have led successful PoC.
- Frontend React application, backend serverless application(using AWS Lambda) implementation.
- Flutter application development for production.
Tags: #React18, #AWSLambda, #AmazonEC2, #AmazonTextract, #yolo9, #GOI-OCR, #Flutter
Mar 2024 - Jul 2024
A RAG(Retrieval Aumented Generation) application for regular audit assistance using Claude Sonnet v3.5.
Contributions:
- Customized AWS RAG application sample: https://github.com/aws-samples/bedrock-claude-chat.
- Prompt engineering for multi-language(Korean, English) knowledge augmentation support.
- Wrote AWS Lambda function for knowledge base sync workload trigger.
Tags: #AmazonBedrock, #AmazonS3, #AWSLambda, #GenAI, #Claude, #AWSCDK
Jan 2024 - Feb 2024
A front-end prototype app with multipart download functionality.
Contributions:
- Improved download speed for a 1.2TB file, reducing time by 40%.
- Designed & implemented a multipart download module with Axios.
- Implemented a front-end app with Next.js & Tailwindcss.
Tags: #Next.js14, #Tailwindcss, #Zustand, #Axios, #AmazonS3
Hammer and wrench
Art gallery
Love problem solving
My small wins
25 OCT 2023
15 SEP 2023
20 JUN 2023
02 FEB 2023
Shoutouts
The most proactive person that I know of
"Whenever there's something to be done, Junha is always the first to volunteer. I've seen this happen so many times that it's become familiar. Thanks to his proactive support even in somewhat challenging or hesitant situations, I feel secure working in the same team and get motivated by his positive energy. "
Tremendous sense of responsibility and passion
"Our first collaboration was on the LG Electronics project in 2023, where I focused on backend development. Despite the project's initial lift-and-shift approach, he didn't settle for routine tasks. Instead, he actively contributed to raising the project's maturity level through proactive refactoring, supporting the growth of other developers. He displayed a passion for tackling challenges and addressing performance issues, which significantly enhanced customer satisfaction. His positive communication and mentorship with junior developers make him stand out as one of the best backend developers I've worked with. Collaborating with him has been both enriching and enlightening for me."
Positive and proactive attitude towards any difficulty or challenge
"During the NFT exchange project with Junha, I was able to learn a lot and witness his outstanding skills. Firstly, Junha's positive and proactive attitude towards any difficulty or challenge left a strong impression. He took the lead in solving problems effectively by tackling them head-on. Technically, Junha demonstrated remarkable competence. Through continuous learning of new technologies and tools, he added innovative ideas and features to the project. His technical prowess significantly contributed to the project's success. I look forward to the opportunity to collaborate with Junha on future projects"
Always passionate and self-motivated
"Junha is one of the colleagues I would love to work with again among those I've worked with before. He is always passionate, self-motivated, and has an excellent ability to implement necessary requirements. Additionally, he consistently strives for his own growth and is a colleague who has no hesitation in engaging in technical discussions and feedback exchanges with others :)"
