Rafał Zieliński
Java Software Developer
Profile Summary
Highly motivated Software Engineer with 3+ years of professional experience in the Java ecosystem. I specialize in delivering clean, well-tested code and driving the full software development lifecycle—from robust CI/CD automation to expert production monitoring. My core focus is on enhancing system reliability and applying emerging technologies, including Generative AI (LLM/RAG), to solve complex enterprise problems.
Work Experience
Software Developer
- Deliver reliable software solutions for enterprise clients within the Enterprise Integration Department.
- Develop and maintain applications using Java, Spring, and Apache Camel.
- Write comprehensive unit and integration tests (JUnit 5, Mockito) to ensure code quality.
- Own end-to-end CI/CD pipelines, ensuring smooth deployment and robust observability (Elasticsearch, Grafana).
- Provide expert 3rd-level support, handling incident management and complex production troubleshooting.
- Conduct in-depth code reviews and refactoring of legacy code.
Trainee Software Developer
- Completed an intensive full-stack programming course focused on Java ecosystem best practices.
- Gained hands-on experience in Agile methodologies and software development lifecycles.
Technical Skills
Java
Language
Spring Boot
Framework
PostgreSQL
Database
Docker
Container
Kubernetes
Orchestration
Kafka
Messaging
Python
Scripting/AI
Azure / GCP
Cloud
Education
WSZIB Kraków
Computer Science (In progress)
Specialization: Cybersecurity
Computer Science (In progress)
Specialization: Cybersecurity
Certificates
- AI Devs 2: LLMOps, RAG
- Google Cloud: Big Data & ML Fundamentals
- Google Cloud: Intro to Kubernetes Engine
- SDA: Java Software Developer
Hobbies
Sports (Squash, Tennis, Padel), New Technologies, AI & Cybersecurity, Electronics/Automatics.