Костянтин

Smozhevskykh Kostiantyn
Ukraine, Chernivtsi | [открыть контакты](см. выше в блоке «контактная информация») | [открыть контакты](см. выше в блоке «контактная информация») | LinkedIn | GitHub
Summary
Junior Java Developer with commercial experience in designing scalable backend systems. Proven expertise in the
Spring ecosystem, microservices architecture, and database management (PostgreSQL, jOOQ). Possesses a strong
foundation in object-oriented programming along with practical full-stack experience (React, TypeScript). Seeking to
apply my problem-solving abilities to create robust and efficient software solutions.

Skills
Programming Skills:
• BE: Java, C++
• FE: React, TypeScript, Next.js
• MySQL, PostgreSQL, MongoDB
• Windows, Linux

Experience
• Junior Java Developer | SIA HySens | Jan 2026 - Present
- Developed backend services for a scalable microservices platform using Java and Spring Boot, contributing to
overall system modularity and fault tolerance.
- Implemented and optimized the data access layer with jOOQ and PostgreSQL, ensuring type-safe SQL queries and
high backend performance.
- Implemented robust end-to-end audit logging mechanisms to ensure strict compliance with enterprise data
security and monitoring standards.
- Developed and integrated REST APIs to facilitate seamless communication across distributed microservices,
accelerating feature delivery.
- Built reusable React components for internal dashboards, contributing to a consistent UI system and reducing
frontend code duplication.
- Worked with Microsoft Azure for deploying and monitoring platform components to ensure stable operation.
- Assisted in maintaining automated CI/CD pipelines, improving build and deployment processes.

• Java Trainee | SoftServe | 2025
- Successfully passed SoftServe course “Advanced Java with Spring”. (CREDENTIAL ID VJ № 26854/2025)
- Gained hands-on experience in building enterprise-level applications, focusing on the Spring ecosystem and
database integrations.

Projects
Spring E-Commerce
• Developed a full-stack e-commerce web application using Spring framework, implemented REST APIs for
shopping cart, user and products. Configured role-based authentication and authorization system using Spring
Security and JWT.
• Tools Used: Java, Spring framework (Security, Data JPA, MVC), PostgreSQL, HTML + CSS
Spring Telegram Bot
• Engineered a multi-functional Telegram bot using the Spring Boot framework to automate tasks and provide
remote system access, implemented REST APIs allowing users to execute remote PC commands such as
shutdown and restart and also implemented personal TODO list in this bot.
• Tools Used: Java, Spring framework (Security, Data JPA, MVC), PostgreSQL, Telegram Bot API
Spring PayPal Integration
• Developed a secure payment processing module by integrating the PayPal REST API into a Spring Boot application.
• Tools Used: Java, Spring framework (Security, Data JPA, MVC)
ArcaBank (University Team Project)
• Acted as the primary QA Engineer within a student development team building a web-based banking application.
• Designed and executed comprehensive manual and automated test cases to validate core business logic and ensure
system stability.
• Managed the end-to-end defect lifecycle, including identifying vulnerabilities, creating detailed bug reports, and
verifying developer fixes.
• Tools Used: Java, JUnit, Postman

Spring Chat
• Built a real-time chat application using Spring Boot and WebSocket. Developed RESTful APIs for chat room and
chat messages. Containerized the application using Docker.
• Tools Used: Java, Spring framework (Security, Data JPA, MVC), Docker, WebSockets

Technologies
Backend: Java, Spring Boot, Spring MVC, Spring Security, Data JPA, Hibernate, jOOQ.
Libraries/Tools: Lombok, MapStruct, Jackson, Flyway/Liquibase, Maven/Gradle. Testing: JUnit, Mockito (Manual &
Automated testing).

Languages

1. Ukrainian - Native
2. English - Upper-Intermediate
3. German - Intermediate

Education
Lyceum №7 Sept 2013 – May 2023
Yuriy Fedkovych Chernivtsi National University, BS in Software Engineering Sept 2023 – May 2027
• Coursework: Hotel System, Languages Course Desktop Application