Backends and data flows
Flask APIs, public and real-time data processing, model input/output handling, and screen-ready responses.
Software developer across data, APIs, and visual systems
Hyeonseok
Jeong
I turn real-world data and AI outputs into usable APIs, visible systems, and clear documentation.
My work includes a camera-based marine food inspection program, public-sector AI guideline research, and Java backend teaching support. I also keep technical notes on data, APIs, and digital twin systems.
What I bring
I can learn an unfamiliar domain, own the flow between systems, and explain the work clearly.
02 / What I Do
From incoming data to a result people can use.
Data to visible systems
Unity/Cesium requests, road data loading and views, browser delivery, and real-time result display.
Work others can follow
Technical documents, reports, requirement notes, schedule coordination, teaching, and review logs.
03 / Selected Work
A working system, explained within a responsible boundary.
01 · Inspection Software · Camera Data · AI Result Delivery
Marine Food Inspection Program
As Developer & Project Coordinator, I connected vision and spectral camera data to AI result processing and near-real-time browser delivery while managing reports, requirements, schedules, and field communication.
- Role
- Developer & Project Coordinator
- Proof
- Two participation periods: 2024.02-2024.04 and 2024.09-2025.03
04 / Experience
Development, research, coordination, and teaching.
Different environments taught me to learn a domain, own a concrete part of the flow, and explain the result.
CodeV · Developer & Project Coordinator
Built camera-data preprocessing, AI-result handling, API/browser delivery, and coordinated reports, requirements, schedules, and field work in a small startup team.
Developer & Project CoordinatorPublic-Sector AI Guideline Research Support
I collected, compared, and organized AI-related guidance materials so public-sector staff could find relevant references when preparing proposals and project documents.
AI framework and guideline research supportJava Backend Teaching Support
I answered Java questions, gave short explanations of core concepts, reviewed learner code, and helped learners understand backend request and database flows.
Teaching assistant · Java Q&A · Basic instruction · Code review05 / Notes
Technical notes, work stories, and personal field notes.
I write technical decisions and separate moments from my own path, one experience at a time.
Personal Note
Arriving Early Before Anyone Asked
A personal note about learning a kids-cafe kitchen before my shift, becoming a manager, and discovering what responsibility feels like when the work is concrete.
Work StoryReturning to a Project With More Responsibility
A work story about leaving an inspection-software project, returning when the company asked for help, and taking responsibility for both development and coordination.
Teaching NoteTeaching Java by Following the Request
A teaching note about answering Java questions, reviewing learner code, and using request and database flows to explain backend concepts.
06 / About
My path was not linear. It made me practical.
I moved through service work, technical training, inspection software, public-sector research, teaching support, and digital twin development. The common thread is simple: I like work where software has to meet real data, real users, and real constraints.
This site is both my portfolio and my notebook. It shows what I built, what I learned, and how my thinking changes as I keep working.
Read my story and working style07 / Contact