Олександр

OLEKSANDR RYBALKO
Java Backend Developer
[open contact info](look above in the "contact info" section) | Ukraine | GitHub | LinkedIn

PROFESSIONAL SUMMARY

Computer Science graduate with a strong focus on Java development. Have experience in building Spring Boot
applications, REST APIs, PostgreSQL databases, and server-side web applications through academic and personal
projects. Passionate about clean architecture, object-oriented design. Seeking a Junior Java Developer position.

TECHNICAL SKILLS

• Languages: Java, SQL
• Frameworks: Spring Boot, Spring MVC, Spring Data JPA, Thymeleaf
• Databases: PostgreSQL, MongoDB
• Testing: JUnit, Mockito
• DevOps: Docker, GitHub Actions, CI/CD
• Build Tools: Maven, Gradle
• Tools: Git, GitHub, IntelliJ IDEA, Postman, Kafka
• Concepts: REST APIs, OOP, MVC, Client–Server Architecture, Agile/Scrum

PROJECTS

• Electrical Installation Configuration System (Bachelor Thesis)
[Tech: Java • Spring Boot • Spring MVC • Spring Data JPA • PostgreSQL • Thymeleaf • REST APIs • JUnit]
• Designed a modular backend application following MVC architecture.
• Implemented business logic for electrical installation calculations.
• Developed REST APIs and dynamic web pages with Thymeleaf.
• Integrated PostgreSQL using Spring Data JPA.
• Wrote automated unit tests with JUnit.

• BlockPuzzle Game (Personal Project)
[Tech: Java • Spring • OOP • Data Structures • JDBC • PostgreSQL]
• Developed a fully functional puzzle game applying core Object-Oriented Programming principles.
• Implemented console and web-game logic, score saving, comment, and rates with database.

EDUCATION

• Technical University of Košice - Bachelor's Degree in Computer Science (2023–2026)
• Bachelor Thesis: Creation of a Web-based Configuration Tool for the Design of Wiring According to the
Investor's Requirements

LEADERSHIP & ACTIVITIES
Software Management Team Lead (Agile/Scrum), Game Jam Team Lead, Hackathon Participant

LANGUAGES
English - B2 | Slovak - B2 | Ukrainian - Native