Anton

Contact Anton Kalenskyi
Software Engineer
Phone
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Software Developer with more than 3 years of practice in Java looking for new
professional opportunities. Got experience in working both with Java Core & Frameworks
Email (Spring, Hibernate), developing RESTful APIs, integrating third-party services, working with
[открыть контакты](см. выше в блоке «контактная информация») Oracle, Postgres, MySQL. Skilled in applying design patterns and SOLID principles. I have
Telegram been working at GlobalLogic for 2 and a half years, developing and maintaining backend
services for electronic payments, invoice processing and remittance tracking, ensuring
https://t.me/Anton_Kalenskyi
smooth data flow between components. Worked in the team developing a project related
LinkedIn to studying languages. Participated in team projects and created websites to gain
[открыть контакты](см. выше в блоке «контактная информация»)
understanding of workflow, ability to estimate, organize and prioritize tasks. I have an
Upper-Intermediate English level, but I'm constantly increasing it. A highly motivated fast
0177b4267/
learner with well-developed soft skills, ready for new challenges and self-learning. Have a
Github strong desire for future experience and improvement in Backend development.
https://github.com/AntonKalenskiy

Address
Experience
Boryspil, Ukraine Software Engineer
Ready to work remotely Oct 2023 - Present
GlobalLogic
Skills Product is a B2B payment and invoicing platform built with Java, Spring Boot and
microservices architecture. The system provides additional protection from fraud
Java 11/17/21, OOP, Design patterns
attempts, helps eliminate checks and manual steps from core accounts payable
Git/Github activities, saving time, money and frustration. It is built on a large, distributed
Apache Maven, Tomcat microservices architecture.
Technologies: Java 17/21, JPA, Maven, Git, Spring Boot, Spring Core, Spring MVC,
SOLID, DRY principles Spring REST, Spring Security, Kafka, Mockito, JUnit tests, Integration tests, Oracle,
Servlets, JDBC Postgres, Liquibase, Swagger, Mapstruct, OAuth 2.0, Keycloack
Responsibilities:
Hibernate, Java Persistence API (JPA)
Developing new functionality for the reporting process
H2, MySQL, PostgreSQL, Oracle, Mongo Designing and implementing RESTful APIs: creating controllers, services and
repositories
Liquibase
Writing unit tests, integration tests and contract tests
Spring MVC/Security/Boot/Cloud Migrating logic from a legacy project into a separate microservice
Supporting existing logic and fixing bugs
Lombok, Mapstruct, Swagger
Writing complex database queries to collect and aggregate essential information
Kafka Addressing security scan results and fixing vulnerabilities in code
Docker, Jenkins, Kubernetes Adding validation and using Swagger for API documentation and testing
Actively participating in expert estimations, code reviews, story grooming, sprint
Resiliency patterns, Observability planning, daily stand-ups and retrospectives.
Railway Cloud, AWS cloud Dec 2022 - Oct 2023
Next Level Apps
Agile and Scrum, Jira
An application that will help children to communicate with each other using foreign
Mockito, JUnit tests, integration tests languages: a messenger with separate chats for different levels.
OAuth 2.0, OIDC, SSO, Keycloak Technologies: Java 17, Git, Apache Maven, Oracle, JPA, Hibernate, Spring Boot,
Spring Security, Spring Web, Kafka, DTO validation, Liquibase, Swagger, Mockito,
HTML5, CSS, JS
JUnit tests, Integrations tests
English: Upper-Intermediate Responsibilities:
Designing and implementing RESTful APIs: creating controllers, services and
Education repositories
Implementing DTO validation
2012 — 2017
Creating mappers between DTOs and entities
Specialist in Railway Operations and Working with Oracle DB and writing custom queries
Transport Management Writing unit tests
State University of Infrastructure and Participating in code reviews and discussing weekly results, blockers and plans
Technology with the project manager

Languages A full-featured web application for managing an online bookstore with secure user
authentication and role-based access control.
English (Upper-Intermediate) Technologies: Java 11, Spring Boot, Spring Security, JWT, REST APIs, JPA
(Hibernate), MySQL, Maven, Lombok, Git, JUnit tests, Liquibase, Swagger, Mockito
Ukrainian (Native)
Responsibilities:
Managing CRUD operations for Books, Categories, and Order Statuses, utilizing
Java Persistence API (JPA)
Implementing RESTful APIs: creating controllers, services and repositories
Implementing DTO validation
Creating mappers between DTOs and entities
Writing unit and integration tests to maintain application reliability
Collaborating with team members using version control (Git) and following Agile
development practices

Sep 2022 - Apr 2023
Freelance
An application for wine selection and delivery across Ukraine that supports user
authentication and registration for new customers. Shopping cart functionality,
advanced wine search and filtering by color, type, occasion and food pairings,
sorting options by price and popularity have been developed. It supports full CRUD
operations for managing user and product data and is built with a focus on clean
architecture, scalability and user-friendly UI.

May 2017 — Nov 2021
Ukraine International Airlines
Flight Attendant
Key accomplishments:
Improved soft skills
Enhanced problem-solving and communication skills
Developed English-speaking skills

Additional Education
Udemy, Microservice architecture course, 2025
Udemy, PL/SQL course, 2024
Udemy, Spring Boot 3, Spring 6 and Hibernate course, 2024
Udemy, JS, HTML, CSS courses, 2023
Java Course, MateAcademy (OOP, Java 8+, Spring, Hibernate), 2022
Java Developer course, ITVDN, 2022
Algorithms tasks: CodeWars (100 solved tasks)
CodingBat (over 200 solved tasks)
Books: Thinking in Java by Bruce Eckel, Effective Java 8 by Joshua Bloch,
The Clean Code Collection by Robert C. Martin, Head First Java by Kathy
Sierra & Bert Bates, Java: A Beginner's Guide by Herbert Schildt

Additional Information
Rather a good guitarist
A fan of board games