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 am also rebuilding an AI-agent workflow and an end-to-end ML service as separate learning labs, with clear evidence gates instead of finished-project claims.
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
- Project participation span: 2024.02-2025.03
04 / Learning Labs
What I am rebuilding until I can explain every part.
These are serious practice tracks, separate from employment and completed case studies. Each page shows the target system, my current evidence, and the gate that remains.
01
AI Agents · Workflow Automation · Operations
Hermes Human-Gated AI Agent Workflow
I am rebuilding the Hermes workflow I have operated so I can explain, change, and recover every step myself, not only run it.
Guided rebuild in progress02Machine Learning · NLP · API Productization
IntentGuard ML Service
I am implementing a full ML service that classifies customer requests, rejects unsupported requests, and leaves enough evidence to reproduce and improve the result.
End-to-end practice in progress05 / 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 review06 / 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.
07 / 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 style08 / Contact