Uladzislau Harkun
I am a Java Software Developer with solid practical experience in Spring and JEE technologies stack.
About
I am a Java Software Developer with solid practical experience in Spring and JEE technologies stack. I have extensive hands-on experience with unit and integration tests and a solid understanding of various control version systems. My practical knowledge extends to working with different databases and a deep understanding of TCP/IP stack network protocols. I approach problem-solving with a ‘Nothing is impossible’ attitude, ready to tackle challenges creatively and efficiently.
- 4 years' experience
- Joined August 2025
Industry experience
- Software & Internet
- Transportation & Logistics
More experts in Wrocław, Poland
Work experience
Developed logistics information system for a shipping company. Migrated the database from IBM Db2 to PostgreSQL, including schema redesign, table structure optimization, and query refactoring. Increased test coverage from 78.7% to 90.3%, reducing regression risk and improving code stability. Implemented a Kafka-based event-driven architecture to synchronize user data across microservices. Participated in code review. Technologies used: Spring, DB2, PostgreSQL, AWS, Docker, Apache Kafka, Grafana, Elasticsearch, OpenSearch, Maven, Jenkins, JUnit, Mockito, GitLab.
Supported and added new features to the document custom control system. Implemented a document processing chain for automated handling and transformation of documents. Developed APIs supporting advanced filtering, sorting, and pagination. Technologies used: J2EE, REST/SOAP, Oracle DB, SQL, Maven, Jenkins, JUnit, Mockito, Docker, GitLab.
Education
Certifications and awards
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