You will get a production-ready LLM agent system with LangGraph, n8n, and LLM
Project details
I'm an AI engineer with a PhD in Mathematics and 4+ years building production ML systems. I don't just connect APIs — I design systems that think, decide, and act autonomously.
Recent production work includes:
• nextinvest.org: solo-built AI pipeline ingesting live market data with LangGraph agents, auto-generating financial analysis daily
• AI Lead Qualification System: n8n + GPT workflow classifying leads and taking automated action instantly
• LLM Marketing Agent at igaworks: LangGraph + ReAct agent delivering data-driven ad insights — achieved 100% improvement in CPC and ROAS
What I deliver: end-to-end AI automation workflows, LLM agent systems, data pipelines, and full-stack AI products — from model design to deployed product. I own the entire system, not just one piece.
Stack: LangGraph · n8n · Python · LLM · AWS · Next.js · PostgreSQL
Recent production work includes:
• nextinvest.org: solo-built AI pipeline ingesting live market data with LangGraph agents, auto-generating financial analysis daily
• AI Lead Qualification System: n8n + GPT workflow classifying leads and taking automated action instantly
• LLM Marketing Agent at igaworks: LangGraph + ReAct agent delivering data-driven ad insights — achieved 100% improvement in CPC and ROAS
What I deliver: end-to-end AI automation workflows, LLM agent systems, data pipelines, and full-stack AI products — from model design to deployed product. I own the entire system, not just one piece.
Stack: LangGraph · n8n · Python · LLM · AWS · Next.js · PostgreSQL
AI Algorithms
Large Language Model, Transformer ModelAI Applications
AI Chatbot, Conversational AI, Natural Language Generation, Natural Language Understanding, Time Series AnalysisAI Development Language
PythonAI Models
ChatGPT, GPT-4What's included $500
These options are included with the project scope.
$500
- Delivery Time 10 days
- Number of Revisions 1
- AI Model Integration
- Prompt Engineering
- Source Code
Frequently asked questions
About Hyunkyu
Data science and AI automation
Seoul, South Korea - 11:02 pm local time
I'm an AI engineer with a PhD in Mathematics and 4+ years building production ML systems. I don't just connect APIs — I design systems that think, decide, and act autonomously.
My recent work includes:
— nextinvest: solo-built AI pipeline that ingests live market data, runs LangGraph agents, and auto-generates financial analysis daily. Live in production.
— AI Lead Qualification System: n8n + GPT workflow that classifies leads and takes automated action instantly. Zero manual work.
— LLM Marketing Agent at igaworks: LangGraph + ReAct agent delivering data-driven ad insights at scale. Achieved 100% improvement in CPC and ROAS.
What I build: AI automation workflows, LLM agent systems, end-to-end data pipelines, and full-stack AI products — from model design to deployed product.
Stack: n8n · LangGraph · Python · GPT · AWS · Next.js · PostgreSQL
If you need someone who can own the entire system — not just one piece — let's talk.
Steps for completing your project
After purchasing the project, send requirements so Hyunkyu can start the project.
Delivery time starts when Hyunkyu receives requirements from you.
Hyunkyu works on your project following the steps below.
Revisions may occur after the delivery date.
Discovery & Architecture Design
I analyze your use case, define the agent architecture, select the right tools (LangGraph, n8n, LLM), and share a detailed technical plan.
Build & Integrate
I build the LLM agent or automation workflow, connect all APIs and data sources, and integrate with your existing stack (CRM, DB, cloud, etc.).