Олена

OLENA MATUS
JAVA SOFTWARE ENGINEER

SUMMARY
Java is more than just my main tool — it’s the language I use to
turn complex problems into clear, working solutions. With near 3
years of professional experience, I’ve learned to balance
CONTACTS precision with creativity. My foundation in applied math and
automation helps me see patterns where others see problems and
[open contact info](look above in the "contact info" section) provides a structured way of thinking, while my projects keep me
[open contact info](look above in the "contact info" section) flexible and explorative. I enjoy building software that’s
smart, practical, and impactful.
Rivne, Ukraine
Remote WORK EXPERIENCE
LinkedIn

Telegram Finik.PRO LLC AUG 2023 - PRESENT
Java Software Engineer
Developed business logic for documents, transactions, statements,
EDUCATION messaging, reports, data import/export, and bank dictionaries using
Java 17, Spring Boot 3.x, Spring 6.x, and REST APIs.
2020 - 2021 Managed PostgreSQL databases with QueryDSL for type-safe queries,
Master of Automation and ensuring data integrity, performance, and scalability.
computer-integrted Integrated QES services (file, token, cloud keys) for authentication
technologies (with honors) and signing, leveraging cryptographic libraries and managing cloud
key lifecycle.
National University of
Connected core banking with internet banking via RabbitMQ, Kafka, and
Water Management and
Oracle procedures, enabling sync/async messaging and reliable data
Environmental flow.
Engineering Implemented validation, error handling, logging, and integration/unit
tests with SLF4J/Logback, JUnit, Mockito, and REST Assured to improve
2016 - 2020 reliability and maintainability.
Bachelor of Applied
Mathematics RENOME SMART FEB 2019 - AUG 2019
National University of QA Engineer
Water Management and Created and executed test plans and cases for functional,
Environmental regression, integration, system, API, performance, and security
Engineering testing, ensuring comprehensive coverage.
Applied test design techniques including Equivalence Partitioning,
SELF-EDUCATION Boundary Value Analysis, Decision Table Testing, and State
Transition Testing to improve test effectiveness.
Conducted system, API, and database testing, analyzing logs to
2023
identify not only bugs but their root causes, contributing to more
Java Developer reliable and maintainable code.
Mate Academy
SKILLS
PERSONAL
Core Java & Principles: OOP, Design Patterns, Java Core, TDD,
Strong analytical and SOLID, Multithreading, Concurrency, Generics, Streams API,
problem-solving skills Collections Framework, Java 8+ features (Lambdas, Optional),
Functional Programming basics, Exception Handling, Memory
Effective team collaboration
Management, JVM Internals, Cryptography algorithms and libraries
Detail-oriented with focus
Web & Application Development: Servlets, JSP, Tomcat, Spring,
on quality
Spring Boot, Spring MVC, Spring Security, Spring Data, Hibernate,
Self-driven and independent JPA, Swagger/OpenAPI, JasperReports, QueryDSL, RESTful APIs
worker
Databases: SQL, MySQL, PostgreSQL, Oracle procedures, Flyway,
Liquibase
LANGUAGES
Messaging & Integration: RabbitMQ, Kafka, Third-party API
English integrations
Upper-intermediate
Version Control, Build Tools & CI/CD: JUnit, Mockito, REST
Ukrainian Assured, Testcontainers, Postman, JaCoCo (code coverage), Jenkins
Fluent
Project Management: Jira, Confluence, Agile/Scrum methodologies