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Work experience

Java developer

from 12.2024 to 01.2026 (1 year 2 months)
Raiffeisen Bank Ukraine, Дистанційно (IT)

• Design and implement backend services aligned with existing financial business flows.
• Develop and enhance microservices within transactional banking systems.
• Implement REST APIs secured with JWT/OAuth2.
• Ensure data consistency using PostgreSQL transactional mechanisms.
• Write unit and integration tests to maintain high reliability.
• Manage full deployment lifecycle (Dev → QA → Staging → Production).
• Contribute to CI/CD processes and production monitoring.
• Facilitated Scrum ceremonies (daily standups, sprint planning, retrospectives).
• Acted as a Scrum Master, improving team communication and delivery predictability.
• Resolved team-level conflicts and removed blockers to ensure smooth delivery.
• Mentored team members and supported onboarding of new engineers.
• Drove process improvements leading to more efficient development cycles.
• Took ownership of delivery across multiple environments (Dev → QA → Staging → Production).

Java developer

from 12.2021 to 12.2024 (3 years)
Playtech, Дистанційно (IT)

• Designed and implemented transaction-related microservices ensuring reliability and scalability.
• Integrated platform with 5+ external systems and third-party services via REST APIs.
• Worked in event-driven architecture using Apache Kafka for asynchronous processing.
• Participated in full development lifecycle: planning, implementation, code review, deployment.
• Improved stability of critical modules by increasing test coverage to 80%+.
• Contributed to performance improvements and production issue resolution.
• Collaborated closely with cross-functional teams to ensure timely delivery.
• Contributed to improving team processes and code quality standards.

Java developer

from 12.2020 to 12.2021 (1 year)
GlobalLogic, Дистанційно (IT)

• Developed and optimized backend components for data tracking and management systems.
• Improved database query performance and optimized SQL statements.
• Reduced production defects by increasing automated test coverage.
• Maintained and troubleshot deployed services.

Java developer

from 01.2018 to 12.2020 (3 years)
Luxoft, Дистанційно (IT)

• Stabilized legacy modules and improved system reliability.
• Implemented new functionality based on evolving business requirements.
• Increased automated test coverage through unit and integration testing.
• Facilitated Agile/Scrum ceremonies and cross-team coordination.
• Facilitated Agile ceremonies and improved cross-team collaboration.
• Helped resolve communication gaps between developers and stakeholders.

Education

Taras Shevchenko National University of Kyiv

Technologies and theory of programming, Cybernetics, Kyiv
Higher, from 2016 to 2020 (4 years)

Bachelor

Additional education and certificates

No additional education or certificates.

Knowledge and skills

• Java
• Spring boot
• Spring Data JPA
• Spring Security
• Microservices
• REST API
• REST
• RESTful Web Services
• Apache Kafka
• PostgreSQL
• Kubernetes
• Docker
• CI/CD
• Grafana
• Kibana
• Elasticsearch
• JUnit
• Mockito
• AI prompting
• AI-інструменти
• SOLID Principles
• Знання принципів TDD
• Scrum
• Scrumban
• Waterfall
• Agile
• Старанність
• Уміння аналізувати
• Управлінські навички
• Доброзичливість
• Адаптивність
• Неконфліктність
• Чесність
• Facilitation
• Coaching
• Mentoring
• Conflict resolution
• Stakeholder management

Language proficiencies

• English — advanced
• Ukrainian — fluent
• French — beginner

Additional information

Senior Backend Engineer with 7+ years of experience building production-grade
microservices in fintech, telecom, and iGaming domains. Specialized in event-driven
architectures using Apache Kafka and transactional systems with PostgreSQL.
Strong expertise in Spring Boot, Spring Security (JWT, OAuth2/OIDC), distributed
systems, and high-load transaction processing. Experienced in designing scalable
REST APIs, integrating external systems, improving test coverage, and optimizing
performance in production environments. Actively leverage AI-assisted development
tools to accelerate test generation, refactoring, and documentation while maintaining
strict code review and production quality standards. In addition to strong technical
expertise, experienced in mentoring engineers, facilitating team collaboration,
resolving conflicts, and driving process improvements. Proven ownership of delivery
across full development lifecycle, ensuring predictable and high-quality releases.

Technical Skills Backend & Frameworks:
• Java (8/11/17/21)
• Spring Boot (microservices, REST, production systems)
• Spring Data JPA (transactions, persistence context, isolation levels)
• Spring Security (JWT, OAuth2/OIDC, Auth0 integration, role-based
authorization)
• Microservices architecture (event-driven systems)
• REST API design & implementation
• Apache Kafka (consumer groups, offsets, retention policies, lag
monitoring, event-driven processing) Databases
• PostgreSQL (ACID transactions, isolation levels, query optimization,
indexing, performance tuning basics) DevOps & Cloud-Native
• Kubernetes (application-level operations, monitoring, troubleshooting,
logs analysis)
• Docker
• CI/CD pipelines
• Observability: Micrometer, Grafana Testing & Engineering Practices
• JUnit, Mockito
• Integration testing
• Test coverage improvement (up to 80%+ on critical modules)
• AI-assisted unit test generation & refactoring
• Clean Code, Refactoring, SOLID principles Architecture
• Distributed systems
• High-load system design
• Performance optimization
• Event-driven architecture
• Leadership & Collaboration:
Conflict resolution and stakeholder communication
Mentoring and onboarding engineers
Process improvements and Agile facilitation
Delivery ownership and cross-team coordination