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Oleksandr
Kozynets
Java Junior Developer

CONTACT PROFILE

Junior Java Developer with a solid understanding of
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object-oriented programming and backend development. Have
hands-on experience building training projects using Java and
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Spring. Highly motivated to grow and develop in backend
development. I am currently finishing a training course at
Ukraine
SoftServe Academy.

EXPERIENCE

Junior Backend Developer

AllStar Company Ukraine | January 2022 to
February 2024
Responsible for implementing new functionality and
supporting legacy systems utilizing HTML, CSS, PHP (YII2),
JavaScript (Vue3)/TS, Docker, MySQL, Postgres, Linux, GIT,
and related technologies.

Assistant System Administrator

Volodymyr Vynnychenko Central Ukrainian State University,
Kropyvnytskyi, Ukraine | October 2019 to December 2021
Responsibilities included configuring and maintaining the
functionality of computers and the network to ensure
uninterrupted and efficient work of the university’s faculty
and
staff. Additionally, assisted the system administrator by
performing assigned tasks and setting up peripheral
devices.

Technical Support Specialist

LLC RUSH (EVA) | September 2018 to
October 2019
I worked at LLC RUSH (EVA), one of the largest retailers in
Ukraine, which operates a nationwide chain of stores and a
major online shop.
TECHNICAL SKILLS

Programming Languages:

●​ Java (Core, OOP, Collections, Streams, Multithreading)​

●​ HTML, CSS, JS, TS​

Frameworks & Technologies:

●​ Spring (Spring Boot, Spring MVC, Spring Data JPA)​

●​ Hibernate / JPA​

●​ REST API​

Databases:

●​ MySQL​

●​ PostgreSQL​

Tools:

●​ Git, GitHub​

●​ Maven​

●​ IntelliJ IDEA​

●​ Postman​

Other:

●​ Linux (Docker)​

●​ Basic knowledge of algorithms and data structures​

PROJECTS

Task Manager (training project)

●​ Java, Spring Boot, Hibernate, Postgres
●​ Developed REST API for task management
●​ Implemented CRUD operations
●​ Integrated database and ORM
●​ Tested API using Postman
●​ Java, Spring Boot, Spring Security
●​ Implemented user registration and authentication
●​ Implemented user roles (USER, ADMIN)
●​ Using JWT