Vladyslav

VLADYSLAV LEVCHUK
JAVA DEVELOPER

CONTACT PROFESSIONAL SUMMARY
Java Software Engineer with almost 2 years of hands-on experience in building
[open contact info](look above in the "contact info" section) scalable microservices and enterprise applications using Spring Boot and related
technologies. Skilled in optimizing system performance, integrating third-party
[open contact info](look above in the "contact info" section) platforms (Cisco CUCM, Webex, Zoom), and designing efficient data solutions with
Redis, PostgreSQL, and MongoDB. Experienced in DevOps practices (Docker, CI/CD
pipelines, monitoring with Zabbix/Prometheus) and cross-team collaboration in
Lviv, Ukraine
Agile environments. Strong focus on delivering high-quality, performant solutions
and driving measurable improvements in system reliability and speed.
[open contact info](look above in the "contact info" section)

@Ssn0b WORK EXPERIENCE

github.com/Ssn0b
Software Developer 2024 March - Now
Tuki

Developed a web platform for migrating data from Cisco systems (CUCM and
SKILLS CUC) to the company’s own solutions, with partial integrations with Webex,
Zoom, and Microsoft Teams. The platform allows users to manage data and
Backend: Java 8/11/17, Spring Boot perform Cisco-related functions through a user-friendly web interface.
(Core, MVC, Data, Security),
Hibernate/JPA, REST API, Microservices, Contributed to the development of a monitoring service for real-time tracking of
Resilience4j, CompletableFuture server and container statuses, auditing events, and handling logs.

Databases & Caching: PostgreSQL, Identified and fixed bugs in the microservices backend (Spring) and the frontend
MySQL, MongoDB (GridFS), Redis (Angular), improving system stability and performance.
Messaging & Async: RabbitMQ, Apache
Kafka Implemented partial Webex integration (e.g., call forwarding for Hunt Groups)
and configured Zabbix integration, enabling clients to monitor their devices
Testing: JUnit, Mockito, Testcontainers through the platform and supporting centralized monitoring of internal Linux
DevOps & CI/CD: Docker, Docker servers (with containers).
Compose, Jenkins, Bitbucket Pipelines,
Git Initiated caching of user data in Redis with nightly updates and organized client
report storage in GridFS (MongoDB) with status tracking in Redis, reducing
Monitoring & Logging: Zabbix, database load and improving data access speed.
Prometheus
Optimized database queries, reducing client response times to milliseconds and
Frontend: Angular, TypeScript speeding up report generation from ~20 seconds to fractions of a second.

Build Tools: Maven, Gradle Actively collaborated with QA, Product Management, and DevOps teams (all
internal communication in English), participated in code reviews, and
Other: OOP, Design Patterns, Algorithms contributed to technical decision-making.

Configured CI/CD processes in the production environment, including backend
EDUCATION jobs to automate routine tasks.

2020-2024
Bachelor of System Analysis,
Ivan Franko National University of Lviv

LANGUAGES
Ukrainian — Native
English — Upper-Intermediate
Polish — Pre-Intermediate