Software Engineer & AI Specialist
Dipl.-Ing. — Budapest University of Technology
At a glance
About
Freelance Senior Java/JEE Developer and Micro-Architect, currently building critical retail systems at a multinational enterprise client. I've been working with LLMs, LangChain, and PyTorch since 2017 — bridging enterprise backend architecture with applied AI.
Selected professional engagements
Senior Java/JEE Developer & Micro-Architect. Delivered a business-critical retail application, reduced bug count, led refactoring, and advised on monolith-to-microservices migration.
Java 17 · Jakarta EE 10 · Hibernate · MySQL · Spring Boot · AWS · Docker
Senior Fullstack Developer. Designed and built a new contract management platform for a major European automotive group from scratch.
Java 17 · Spring Boot · PostgreSQL · Angular 14 · AWS · Docker
Senior Java Backend Developer. Re-implemented a legacy lottery system on a REST-based microservice architecture with CI/CD and performance tuning.
Java 8 · Jersey · Oracle DB · OpenShift · Docker · Jenkins
Senior Java Backend Developer. Backend development on a REST microservice platform, load testing, code analysis, and architecture decisions.
Java 8 · Spring · OpenShift · Apache JMeter · SonarQube
Personal AI/ML projects — github.com/haromrozsa
Experimentation with large language models using Hugging Face and Transformers. Built AI agents and multi-step workflows with LangChain and LangGraph.
Python · Hugging Face · LangChain · LangGraph · ONNX
Implementation of NLP pipelines and deep learning models for classification and generation tasks.
Python · PyTorch · TensorFlow · Keras · scikit-learn · NumPy · Pandas
Independent projects combining market data analysis with NLP-based sentiment signals for automated trading strategies.
Python · Pandas · scikit-learn
Image recognition models and reinforcement learning experiments as part of independent AI research.
Python · TensorFlow · Keras
Professional credentials
MLS-C01 · Amazon Web Services
NCA-GENL · NVIDIA
OCEJWSD6 · Oracle
OCPJWCD5 · Oracle
SCBCD · Sun Microsystems
SCJP · Sun Microsystems