Білан

Tadei Bilan
Java Developer
Kyiv, Ukraine • [open contact info](look above in the "contact info" section) • [open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section)

PROFESSIONAL SUMMARY
Java Developer with 6+ years of experience building backend systems for datacenter network orchestration. Proven
expertise in microservices architecture, relational databases, REST and gRPC API design, and low-level hardware
integration via industry protocols. Comfortable working directly with international clients and translating complex
technical requirements into reliable, production-grade software.

TECHNICAL SKILLS
Languages: Java
Frameworks and libraries: Spring Boot, Spring MVC, Spring Data JPA, Spring Security, JOOQ, Lombok, Mapstruct
Testing: JUnit, Mockito, Test containers
APIs & Protocols: REST, gRPC, gNMI
Databases: PostgreSQL, Liquibase
DevOps & Tools: Docker, Kubernetes, Maven, Git, Jira, IntelliJ IDEA
Networking: SONiC network devices, datacenter infrastructure

WORK EXPERIENCE

Java Developer
Bluefield Technologies | Kyiv, Ukraine | 2019 – 2026
Contributed to the design and development of a production-grade orchestration tool that enables datacenter engineers to
manage complex network device configurations through an intuitive UI, built on a distributed microservices architecture.
 Engineered and evolved the data access layer using PostgreSQL — progressing from Hibernate ORM and plain SQL to
JOOQ
 Designed and implemented RESTful and gRPC APIs to enable communication across distributed microservices
 Developed and maintained core business logic using Java
 Implemented integration with SONiC network switches using the gNMI protocol, enabling real-time programmatic
control and monitoring of network device configurations
 Collaborated directly with international clients in technical requirement sessions and live debugging

Automation QA Engineer
Listat Software Development | Kyiv, Ukraine | 2018 – 2019
 Developed and maintained automated test suites for backend services
 Collaborated with developers to identify, document, and resolve software defects
EDUCATION
Bachelor degree in Computer Science
Taras Shevchenko National University of Kyiv | Kyiv, Ukraine

LANGUAGES
Ukrainian: Native
English: B2 – Upper Intermediate