Python AI/LLM & Java Full-Stack Specialist

As a seasoned software engineer with over 20 years of experience, I specialize in Python backend development, AI-powered automation, and Java-based enterprise systems. My recent focus has been on building intelligent, scalable, and high-performance systems for large enterprises across finance, electronics, and e-commerce industries.

•  Python Backend Development & AI/LLM Systems

I led the development of an AI-powered recommendation system for a major corporation, leveraging RAG (Retrieval-Augmented Generation) architecture, LLM search, and LangChain. This involved developing Python batch processes for web crawling and scraping vendor data, analyzing documents with Azure Document Intelligence, and storing structured results in vector databases (Faiss, Azure). I also built robust REST APIs using FastAPI to enable seamless chat-based client integration.
For a global electronics company, I maintained and enhanced a machine learning-based demand forecasting system. This included full-lifecycle support of ETL and ML pipelines in Python: data extraction, preprocessing, model tuning, post-processing, and BigQuery integration. Technologies included Pandas, Informatica ETL, Shell scripting, and Docker.

For a semiconductor company, I developed the backend APIs for a data analysis platform that manages resource allocation (CPU, GPU, memory) and job automation. I also created a Python-based automated testing framework to validate system environments and workflows. My toolset included Flask, Flask-RESTful, NumPy, JSON, and Oracle.

I’ve also built REST APIs for e-commerce platforms (mall-in-mall system), established AWS and DB servers, and implemented real-time web crawling/scraping engines for sports and trend tracking using Selenium, BeautifulSoup, Django, and Flask.

• Java Backend & Full-Stack Development

In a major banking system rebuild project, I developed automated deposit transfer services, batch jobs, and UI screens using Java, Spring Boot, Spring Batch, and Oracle. I also migrated legacy C programs into scalable Java modules.

I contributed to the EDMS development for a bank’s online platform, designing document registration, conversion, analytics, and admin functions using Java, JSP, MyBatis, and MySQL. Additional Java projects include:

- Enhancing vehicle service platforms using Spring & Kotlin
- Implementing mobile order modification interfaces with JSP/JavaScript for telecom companies
- Building common modules for national systems using egovframework

• Technical Strengths

Languages: Python, Java, JavaScript, Shell
Frameworks: FastAPI, Flask, Django, Spring Boot, Spring Batch
AI/ML: LangChain, OpenAI, RAG, Azure Document Intelligence
Frontend: JSP, HTML/CSS, JavaScript, JQuery
Database: MySQL, Oracle, BigQuery, SQLite, MariaDB
Tools: Git, Docker, CMD test clients, Sphinx, Linux scripting