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Work experience

Middle Java Developer

from 03.2021 to now (4 years 5 months)
Danavero Inc., Харків (IT)

1. Horses Owners Platform (Sep 2024 - Present)
An online marketplace and community platform for horse owners, enabling users to buy, sell, and register horses.

Responsibilities:
- Troubleshot and resolved backend issues, ensuring system stability.
- Designed and optimized RESTful APIs, improving system reliability.
- Integrated mail messaging for notifications and user alerts.
- Developed and maintained backend using Java and PostgreSQL.
- Deployed and managed services using Docker for scalability.

2. Web Game Simulation (Dec 2023 - Sep 2024)
A simulation game for an insurance corporation, where users manage life choices such as buying a house, car, and insurance.

Responsibilities:
- Participated in all stages of server-side development, from architecture design to deployment.
- Collaborated with developers and stakeholders to align technical solutions with business needs.
- Designed and optimized RESTful APIs, improving system reliability and response time.
- Developed and maintained backend services using Java, Spring Boot, and PostgreSQL.
- Implemented authentication and authorization using Spring Security.
- Managed database migrations with Flyway, ensuring data integrity.
- Deployed and orchestrated services using Docker for scalability.

3. Banking System (Mar 2021 - Feb 2022)
A financial application handling account management, transactions, and customer support.

Responsibilities:
- Collaborated with cross-functional teams to align technical solutions with business needs.
- Automated build and deployment processes using Jenkins, improving CI/CD efficiency.
- Designed and secured RESTful APIs, ensuring compliance with banking regulations.
- Implemented and optimized payment processing systems for secure transactions.
- Monitored and optimized system performance using SLF4J and Logback.
- Developed and maintained services using Java, Spring, and Sybase.

4. Inner projects
- Advertisement System (3 months): Built an Android application for displaying dynamic advertisements in public places.
- Transaction Service (2 months): Developed a backend service for updating transaction data from remote sources.

Junior Java Developer

from 08.2020 to 03.2021 (7 months)
TAGsoft, Харків (IT)

1. Numismatics Platform (Aug 2020 - Mar 2021)
A platform for coin collectors to identify and search for coins based on scanned images.

Responsibilities:
- Integrated Google Cloud Vision (GCP Vision) for image recognition and coin identification.
- Built search functionality using Elasticsearch, improving data retrieval efficiency.
- Designed and implemented a web scraper to collect coin data from external sites.
- Initiated and developed the project from the ground up to full implementation.
- Developed backend services using Kotlin, PostgreSQL, and Hibernate.
- Designed and optimized database schemas for scalable data storage.
- Ensured system stability with unit tests using JUnit and Mockito.

2. Sports & Health Platform (Aug 2020 - Mar 2021)
A health-tracking platform integrating payment services for fitness subscriptions.

Responsibilities:
- Designed and developed RESTful APIs for user interactions and payment transactions.
- Optimized backend performance, reducing response times and improving scalability.
- Wrote unit and integration tests using JUnit and Mockito to ensure code quality.
- Implemented structured logging with SLF4J and Logback for better monitoring.
- Fixed critical bugs and enhanced system stability through rigorous testing.
- Documented technical processes, ensuring maintainability and scalability.
- Integrated BlueSnap payment system for seamless subscription processing.

Trainee Java Developer

from 10.2019 to 08.2020 (10 months)
Enifsoft, Харків (IT)

Auto Parts Marketplace (Oct 2019 - Aug 2020)
An online marketplace for buying and selling auto parts.

Responsibilities:
- Implemented a Telegram bot for automated user interactions and order tracking using the Micronaut framework.
- Created and maintained technical documentation for all microservices using Swagger Editor.
- Developed and optimized backend logic for handling product listings and transactions.
- Wrote unit and integration tests using JUnit and Mockito to ensure code reliability.
- Implemented structured logging with SLF4J for better monitoring and debugging.
- Integrated MongoDB and PostgreSQL for efficient data storage and retrieval.
- Improved system performance by identifying and fixing bugs.

Education

Національний університет цивільного захисту України

Інженер з профілактичних робіт, Харків
Higher, from 2003 to 2008 (5 years)

Additional education and certificates

Source IT

2018, 7

Knowledge and skills

• Java
• MySQL
• Git
• Spring Framework
• Hibernate
• SQL
• Apache Maven
• JDBC
• JUnit
• IntelliJ IDEA
• Apache Tomcat
• Eclipse
• Servlets
• PostgreSQL
• Spring Boot
• JPA
• MVC
• Database
• REST
• IDE
• Collections
• Frameworks
• Gradle
• MongoDB
• H2
• Jetty
• NoSQL
• Swagger
• Stream API
• API
• Apache Kafka
• Знання принципів ООП
• Java Core
• Знання технологій JDBC
• Docker
• Kafka
• OAuth2
• Spring Security
• Sybase

Language proficiencies

English — average