Contact information

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Work experience

Fullstack-розробник

from 07.2024 to now (1 year 9 months)
GeeksForLess Inc., Дистанційно (IT)

-Built backend logic and APIs (NestJS) for core platform modules: competencies, career goals, recommendations, user profiles, and admin functionality; ensured proper validation and modular isolation.
-Owned the security component: authentication/authorization, JWT mechanics, role management, access control across modules, internal Auth API support, and integrations with external services.
-Worked with two databases: DynamoDB (audit/change history/user progress) and PostgreSQL (structured business data); designed schemas/indexes, implemented CRUD, and optimized queries.
-Integrated AWS services: S3 (file uploads, permissions, error handling) and Lambda for background processes (report generation, data cleanup, behavior analytics, statistics updates); worked with AWS infrastructure (incl. CloudWatch).
-Developed internal libraries and published them to AWS CodeArtifact (logging/error handling/models/validation), set up versioning and reuse across services.
-Ensured quality via unit/integration/e2e (incl. high-load) testing for critical flows; built Angular UI components and pages and integrated them with the API via Angular services.

Java-розробник

from 07.2023 to 04.2024 (10 months)
GeeksForLess Inc., Дистанційно (IT)

Developed and maintained CRUD for email/notification templates, delivery settings, and notification type management.

Processed banking system events: consumed messages from Kafka, generated the required notification type, and queued notifications for delivery.

Implemented batch processing and multithreading for mass mailings (Spring Scheduler); optimized performance and resolved deadlocks / queue latency issues.

Built and maintained internal REST APIs for other services (creating notifications, updating settings, statuses, templates).

Wrote unit and integration tests, including tests for async/multithreaded flows; participated in load/stress testing.

Maintained technical documentation (endpoints, notification processing flows, data requirements).

Front-end разработчик

from 06.2021 to 02.2022 (9 months)
Monkeylab (IT)

Education

ДЕРЖАВНИЙ УНІВЕРСИТЕТ ІНТЕЛЕКТУАЛЬНИХ ТЕХНОЛОГІЙ І ЗВ’ЯЗКУ

F5 - Кібербезпека та захист інформації, Одеса
Higher, from 2025 to 2027 (2 years)

ДЕРЖАВНИЙ УНІВЕРСИТЕТ ІНТЕЛЕКТУАЛЬНИХ ТЕХНОЛОГІЙ І ЗВ’ЯЗКУ

125 - Кібербезпека та захист інформації, Одеса
Unfinished higher, from 2023 to 2025 (2 years)

Колледж связи

Одесса
Secondary, from 2019 to 2023 (4 years)

Additional education and certificates

Basic java course (Geek for less)

3 месяца

Java advanced course (Geek for less)

5 месяцев

Knowledge and skills

• Java
• Git
• Spring Framework
• Hibernate
• Docker
• JavaScript
• Apache Maven
• JUnit
• SQL
• MySQL
• DynamoDB
• Apache Kafka
• RabbitMQ
• AWS
• NestJS
• Cucumber
• Selenium
• Playwright
• HTML
• CSS
• Angular
• React

Language proficiencies

• Ukrainian — fluent
• English — average

References

Сергей Хомич

Сергей Хомич

Java Software Engineer | Architect, GeeksForLess Inc.

Additional information

- Java (Core, Multithreading)
- Spring / Spring Boot
- Hibernate / JPA / JDBC
- SQL: PostgreSQL, MySQL
- NoSQL: DynamoDB
- AWS: Lambda, S3, CloudWatch, CodeArtifact
- Apache Kafka
- Docker
- Git
- Maven / Gradle
- Flyway
- Testing: JUnit; Unit/Integration/E2E; High-load/Stress tests
- Backend: REST API, Microservices, API Gateway
- NestJS
- Frontend: Angular, React
- MinIO (object storage)
- CI/CD