Роман

Roman Zozulia
Strong Junior Java Engineer (2,5 years)

CONTACT
[відкрити контакти](див. вище в блоці «контактна інформація») [відкрити контакти](див. вище в блоці «контактна інформація») LinkedIn GitHub

PROFFESSIONAL SUMMARY
Java Developer with 2.4 years of commercial experience in backend development, Spring-
based applications, REST APIs, database persistence, testing, and production support.
Practical experience in FinTech, EduTech, environmental awareness, and HealthTech
projects. Comfortable contributing to backend services, integrating AI-powered features,
improving access control, writing tests, troubleshooting issues, and working in
collaborative code review processes.

TECHNICAL SKILLS
Programming languages: Java
Frameworks and libraries: Spring Boot, Spring Core, Spring MVC, Spring Security, Spring
Data, Hibernate, Log4j,SLF4J, JUnit, TestNG, Mockito
Tools and platforms: Maven, Gradle, Tomcat, Kafka, Corezoid, Docker, Git, GitHub, GitHub
Actions, CI/CD, Swagger/OpenAPI, Liquibase, Elasticsearch, Kibana, Grafana
Java Core and Java EE: Java syntax, OOP/OOD, Collections Framework, Multithreading, Java
IO/NIO, JDBC, Servlets, JSP, JSF, EJB, JTA, JPA

Databases: PostgreSQL, MySQL,MongoDB

LANGUAGES
English - B2 Polish - A2 Ukrainian - native

WORK EXPERIENCE
FinTech platform for digital banking (emerging markets) | 1 year 7 months
Contributed to a FinTech platform helping traditional banks in India, Azerbaijan, Kyrgyzstan,
Uzbekistan, Vietnam, and Morocco launch mobile-first digital banking services with credit,
savings, payment, and customer engagement features.

Junior Java Developer | Jul 2025 – Sep 2026
Developed and maintained the order-service microservice, contributing to feature
development, bug fixes, and code changes within the team's codebase.
Fixed bugs across services owned by the team, investigating and resolving production issues
end-to-end.
Designed the architecture for a new service for evaluating operator knowledge and skills,
including test coverage for the system.
Developed the operator knowledge-evaluation system itself, from architecture to
implementation.
Maintained and improved services owned by the team, including refactoring code and fixing
security vulnerabilities.
Set up and configured Claude Code integration with internal services, streamlining the
development workflow.

WORK EXPERIENCE

Technical Support Engineer (L3) | Mar 2025 – Jul 2025
Handled L3-level escalations across multiple regional markets, diagnosing complex
production issues via Kibana logs and internal admin tools.
Investigated and resolved bugs in the internal customer support admin panel and related
internal tools, tracking resolution through Jira.
Contributed to AI-agent development as part of the support function's tooling and
automation.
Communicated directly with end users, enabling faster response to their requests and
quicker bug fixes.
Created documentation to guide L1/L2 support in correctly handling and routing user
inquiries.
Acted as a liaison between support and development teams, translating user-reported
issues into actionable technical tickets.

Stack: Java Core, Spring Boot, Spring MVC, Spring Security, Hibernate, JPA, JUnit, REST API,
PostgreSQL, Corezoid, Elasticsearch, Kibana, Grafana, Docker.

AI-powered solution for exam test generation and evaluation | 3 months
Developed a minimum viable product for automatic generation and evaluation of examination
tests based on uploaded curriculums. The solution included a Java backend, a native iOS app,
and OpenAI integration.
Junior Java Developer | Apr 2025 – Jul 2025
Developed backend services using Java and Spring Boot.
Integrated backend services with OpenAI (GPT-4 Mini) for test generation and evaluation.
Implemented REST APIs with Spring MVC for curriculum upload, exam test generation, and
result evaluation.
Managed database schema changes using Liquibase.
Added basic application logging using SLF4J and Log4j.
Wrote unit tests for core functionality using JUnit and Mockito.
Used Git and GitHub for version control and collaboration.

Stack: Java Core, Spring Boot, Spring MVC, Spring Security, Hibernate, JPA, JUnit, REST API,
PostgreSQL.

Environmental awareness app | 2 months
Junior Java Developer | Jul 2024 - Sep 2024

Worked on a platform focused on environmental awareness and user engagement.
Implemented registration via Google and Facebook accounts for users who were not
previously registered in the system.
Covered different layers of the codebase with unit and integration tests.
Identified, analyzed, and fixed bugs based on root-cause investigation.
Reviewed and validated pull requests.

Stack: Java Core, Spring Boot, Spring MVC, Spring Security, Hibernate, JPA, JUnit, REST API,
PostgreSQL.

WORK EXPERIENCE

iOS communication app | 3 months
Contributed to a communication solution for non-verbal and speech-impaired users. The team
migrated an iOS app from UIKit to SwiftUI and extended existing functionality while supporting iOS
13 and integrating with a C++ voice library.

iOS Developer | Sep 2022 - Nov 2022

Developed the layout of the configuration settings page.
Implemented business logic for the configuration settings page.

Stack: Swift, C++, SwiftUI, GitHub, GitHub Actions

EDUCATION
Bachelor of Computer Science
Lviv Polytechnic National University
2021 - 2025

COURSES

Junior Corezoid Developer, Corezoid, 2026, Certificate

Complete Java Developer Course, SoftServe Academy, 2024, Certificate

Practical Java, SoftServe Academy course, 2024, Certificate

DevOps For Developers, SoftServe Academy course, 2024, Certificate

Database Fundamentals, SoftServe Academy course, 2023, Certificate

Java Fundamentals, SoftServe Academy course, 2023, Certificate

Cybersecurity Essentials, Cisco Networking Academy, 2023, Certificate

HTML5 / CSS3 / JavaScript Fundamentals, SoftServe Academy
course, 2023, Certificate

Web development, Lviv Polytechnic National University, 2018, Certificate