Ilya

Ilya Samilyak PROFILE

Java Developer Skilled Java Developer with over two years of
commercial experience in backend development
using Java Core, Spring Boot, and Hibernate.
[відкрити контакти](див. вище в блоці «контактна інформація») Proficient in designing scalable architectures, working
[відкрити контакти](див. вище в блоці «контактна інформація») with relational and NoSQL databases, and integrating
third-party services such as Stripe and Telegram
Kyiv API.Experienced in developing microservice-based
LinkedIn systems, writing clean, maintainable code, and
optimizing database performance.Motivated, detail-
Github oriented, and constantly improving technical
Telegram knowledge to deliver high-quality software solutions
and contribute effectively to team goals.

SKILLS PROFESSIONAL EXPERIENCE
Java Developer
Java — (8, 17), Core, Collections, OOP, NDA - Contract
SOLID, Microservices
05/2023 – 02/2025
Designing and developing software architecture and
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Kotlin — Android Studio (Basic) modular services using Spring Boot and Java 17.
Migrated a legacy monolithic application to a
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microservice-based architecture, improving
DB — Hibernate, JDBC, MySQL, H2, scalability and maintainability.
MongoDB, PostgreSQL, Redis Managed databases (MySQL, PostgreSQL,
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MongoDB) and designed efficient relational
Spring — Boot, Core, Web, Security, Cloud schemas.
Developed and optimized SQL queries, improving
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performance of data-heavy operations and reducing
Web Development — Servlet, JSP, query execution time by over 30%.
Tomcat, HTML, CSS, XML, Angular Integrated third-party services including Stripe for
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(basic) payment processing and Telegram API for
automated user notifications.
Tools — JUnit, Mockito, Maven, Swagger, Covered business-critical features with unit and
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Liquibase, Docker, Lombok, Mapstruct, integration tests to ensure system reliability.
Postman, Jira, IntelliJ IDEA
Achievements:
Reduced payment processing time by 25% after
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Containerization & CI/CD — GitHub integrating and tuning Stripe session handling.
Actions, GitLab CI/CD, Jenkins (basic) Improved overall database performance by
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optimizing indexes and restructuring queries.
Automated key communication tasks via Telegram
Testing — JUnit 5, Testcontainers,
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bot, reducing manual work for the support team.
WireMock
PROJECTS
Message brokers — Kafka, RabbitMQ
EasyStay (microservices)
Microservices-based booking platform with Spring
EDUCATION Security, Stripe payments, Telegram notifications, and
Docker deployment
Master's degree in Law
Yaroslav Mudryi National Law University EasyStay (monolit)
Kharkiv, Ukraine Accommodation booking web app (Java, Spring Boot,
REST, MySQL, Stripe, Telegram API)
COURSES
OTHER PROFESSIONAL EXPERIENCE
Java course at Mate-academy
Co-Founder and Sales Director
Kyiv, Ukraine
09/2012 – 03/2021
OOP, Java 8+, Spring, Hibernate
Ensured quality distribution.
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Udemy Monitored sales and inventory.
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- Java for Beginners: From Scratch to Oracle Negotiated contracts and managed payroll.
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Certification Developed strategic partnerships to expand market
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- Java–Earn Your Black Belt! presence.
- Spring for Beginners Implemented sales strategies resulting in consistent
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revenue growth.
LANGUAGES
English