Oleh

Oleh
Onyshchuk
Java Software Developer

Profile
I possess a strong command of Java along with proficiency in key
technologies and frameworks such as Spring Boot, Hibernate, and Maven.
I am adept at writing clean, maintainable code and have a keen eye for
performance optimization and code efficiency.

Contact
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Work Experience
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Portalworks GmbH
Linkedin:
06.2025 - current
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oleh-onyshchuk-139781101 Full Stack Developer - Liferay(Java/Js)
Designed and implemented custom Liferay portlets and fragments to support
internal business processes.
Education Integrated Azure video transcription service with Liferay for automated subtitle
generation and content publishing.
Ivan Franko National University of Lviv Collaborated with business analysts and stakeholders to translate requirements into
scalable Liferay solutions.
Masters degree
2005 - 2010 Vector
11.2024 - 06.2025
Full Stack Developer- (Java/Js)
Student at SoftServe IT Academy
01.2024 - 11.2024
Certificate in Java Development
scrt.com.ua
02.2022 – 01.2023 Full Stack Developer
Developed a web-based e-commerce project, Opencart, PHP, JavaScript,
HTML, CSS, MySQL.
Implemented the back-end and front-end functionalities, add content, manage data
Skill base, create custom extencions,deploy on server, CI/CD

02.2022 - 01.2024
OOP & Design CodePhusion
Java + JUnit Java Software Developer
Project: Developed a web-based bio-tech company management system using
Spring Boot Java, Spring Boot, and PostgreSQL.
Designed and implemented RESTful API endpoints, which increased interoperability
Hibernate
and reduced integration time for external systems by 25%.
RESTful Web Services Wrote and maintained integration and unit tests, achieving over 85% test coverage,
which improved overall software quality and reduced production bugs.
HTML/CSS/JavaScript
02.2011 - 03.2021
PostgreSQL/MySql Goverment
Docker/GIT/Linux/JIRA System Administrator
English Level: Advanced
KEY COMPETENCIES
Certification Developed and tested Java-based Debugged and resolved issues in existing
Udemy - Master Spring Boot 3 & Spring applications as part of a development codebases.
Framework 6 with Java - 2023 team. Critical thinking skills.
Contributed to the design and Collaborated with cross-functional teams to gather
Udemy - JUnit tutorial - 2022 implementation of new features and requirements and deliver solutions.
functionalities.