Ilya

Ilya Samilyak PROFILE
• Skilled Java Developer with over two years of
Java Developer commercial experience in backend development
using Java Core, Spring Boot, and Hibernate.
[open contact info](look above in the "contact info" section) • Proficient in designing scalable architectures,
[open contact info](look above in the "contact info" section) integrating third-party services (Stripe, Telegram
API), and optimizing database performance.
Kyiv
• Detail-oriented and constantly improving
LinkedIn technical knowledge to deliver high-quality
Github solutions and contribute effectively to team
goals.
Telegram

PROFESSIONAL EXPERIENCE
SKILLS
Java Developer
NDA - Contract
Java — (8, 17), Core, Collections, OOP, SOLID,
05/2023 – 02/2025
Microservices
Designed and developed software modules and
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services using Java 17 and Spring Boot in both
DB — Hibernate, JDBC, MySQL, H2, MongoDB, monolithic and microservice architectures,
PostgreSQL, Redis implementing the SAGA pattern for distributed
data consistency.
Implemented inter-service communication using
Spring — Boot, Core, Web, Security, Cloud
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OpenFeign for synchronous operations and
RabbitMQ for asynchronous event-driven
Web Development — Servlet, JSP, Tomcat, HTML, messaging, ensuring optimal system performance.
CSS, XML, Angular (basic), React (Basic) Built REST APIs and integrated them with external
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services such as Stripe (payment processing) and
Telegram API (automated notifications).
Tools — JUnit, Mockito, Maven, Swagger, Managed relational (MySQL, PostgreSQL) and
Liquibase, Docker, Lombok, Mapstruct, Postman,
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NoSQL (MongoDB) databases; optimized
Jira, IntelliJ IDEA schemas, SQL queries, and indexes to improve
performance of data-heavy operations.
Containerization & CI/CD — GitHub Actions, Implemented caching mechanisms (Redis) to
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GitLab CI/CD, Jenkins (basic) improve response times and reduce database
load.
Configured containerization with Docker and
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Testing — JUnit 5, Testcontainers, WireMock implemented a full observability stack, including
distributed tracing (Zipkin), metrics monitoring
(Prometheus), and centralized logging (Promtail,
Message brokers — Kafka, RabbitMQ
Loki, Grafana).
Covered business-critical features with unit and
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Team Practices & Communication — Kanban, integration tests (JUnit, Mockito, Testcontainers)
Jira, teamwork, and effective communication to ensure system reliability.
Achievements:
EDUCATION Reduced payment processing time by 25% by
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optimizing Stripe Checkout session handling.
Master's degree in Law Improved performance of data-heavy operations
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Yaroslav Mudryi National Law University by 30% through SQL query optimization and
Kharkiv, Ukraine indexing.
Automated key communication tasks via Telegram
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COURSES bot, reducing manual work for the support team.

Java course at Mate-academy OTHER PROFESSIONAL EXPERIENCE
Kyiv, Ukraine
OOP, Java 8+, Spring, Hibernate Co-Founder and Sales Director
09/2012 – 03/2021
Udemy Ensured quality distribution.
- Java for Beginners: From Scratch to Oracle
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Monitored sales and inventory.
Certification
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Negotiated contracts and managed payroll.
- Java–Earn Your Black Belt!
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Developed strategic partnerships to expand
- Spring for Beginners
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market presence.
Implemented sales strategies resulting in
LANGUAGES
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consistent revenue growth.
English