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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.…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.

Uladzislau Harkun

Developer, Programmer, Back-End Developer

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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.…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.

Available to hire

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.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Advanced

Russian

Fluent

Polish

Beginner

Work Experience

Java Software Developer at Hapag-Lloyd

June 1, 2022 - Present

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.

Java Software Developer at IBA Group

May 31, 2022 - August 21, 2025

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.