Denys Partnov

Background

About Denys Partnov

Java / Liferay Backend Developer | 5+ Years of Commercial Experience Passionate backend developer with over 5 years of experience building and maintaining enterprise-grade applications across the financial, security, and portal solutions domains. Specializing in Java and Liferay platforms, with a strong focus on clean architecture, scalability, and team collaboration. I’ve worked on a variety of commercial projects using modern Java technologies, Spring Boot microservices, and modular OSGi-based systems, including end-to-end feature development, production support, CI/CD pipeline configuration, and mentoring junior team members. Core Technical Skills- Languages & Frameworks: Java SE 8/11/21, Java EE 8, EJB, Spring Boot, Hibernate, JPA, Liferay DXP / CE 7+- API & Integration: REST API, GraphQL, Swagger, OpenAPI, OpenFeign, Apache Camel - Databases: PostgreSQL, MS SQL Server, Oracle DB, MySQL, InformixDB - DevOps & Tools: Docker, OpenShift, Jenkins, Maven, Gradle, SonarQube, Splunk, Kibana, Prometheus - Security & Identity: Spring Security, Keycloak, Azure B2C - Messaging & Reporting: Rabbit MQ, Kafka, Jasper Reports - Testing: JUnit, Mockito - Version Control & Collaboration: Git, GitLab, Bitbucket, Jira, Confluence ‍ Additional Skills- C#, Python 3, JavaScript, React - Tomcat, WildFly, JBoss - Nginx Soft Skills- Strong team player with clear communication and adaptability - Problem-solving mindset with a focus on long-term maintainability - Experience mentoring junior developers and supporting cross-functional teams Languages- English – B1 - Czech – B2 - Ukrainian – Native