Serhii

Serhii Markovskyi
Java Developer
Kyiv, Ukraine
Java Developer with 4+ years of commercial experience in backend development.
Experienced in building and maintaining Java/Spring-based product applications in cloud and
containerized environments.
Worked with microservices, Kubernetes, Azure, relational databases, and CI/CD pipelines.
Strong focus on code quality, maintainability, and production stability.

Contact Experience
Phone:
[відкрити контакти](див. вище в блоці «контактна інформація») March 2023 – Present (2 years 11 months)
Email: Luxembourg Online S.A.
[відкрити контакти](див. вище в блоці «контактна інформація») Java Developer
Linkedin: Developed and maintained microservice-based backend applications using Java 11/17
Serhii-Markovskyi-UA and Spring Boot
Designed and implemented RESTful APIs consumed by frontend and external systems

Expertise Worked with Spring Data JPA / Hibernate, handled entity relationships and
transactions
Used PostgreSQL for persistent storage, optimized SQL queries and indexes
Core Java Integrated services via REST and Apache Kafka
Java 8 / 11 / 17 Used event-driven approach using Apache Kafka
OOP, SOLID, Clean Code Worked in containerized environment (Docker, Kubernetes)
Collections, Streams API Deployed and supported applications running in Azure cloud
Multithreading basics Used Azure services (Azure Kubernetes Services / Azure Key Vault / Azure Front
JVM fundamentals Door / Azure Monitor)
Backend & Frameworks Participated in CI/CD pipelines (build, test, deploy) using Git-based workflows
Spring Boot Monitored applications using logs and metrics, fixed production issues
Spring MVC (REST) Participated in code reviews, refactored legacy code
Spring Data JPA Collaborated with QA, Product Owner, DevOps and Frontend teams
Spring Security Worked in Agile/Scrum environment
Hibernate
Databases February 2022 – February 2023 (1 year 1 month)
PostgreSQL
EPAM Systems
MySQL
SQL (joins, indexes, optimization) Java Developer
Liquibase
Developed backend components using Java and Spring Boot
Microservices & Integration
Implemented REST APIs according to project requirements
Microservice architecture
Worked with Hibernate / JPA and relational databases
RESTful APIs
Participated in development of enterprise-level microservices
Apache Kafka
Wrote unit tests using JUnit and Mockito
Event-driven understanding
Worked with Docker and basic CI/CD pipelines
Cloud & DevOps
Participated in code reviews and followed corporate standards
Docker
Kubernetes
Microsoft Azure
December 2020 – February 2022 (1 year 3 months)
CI/CD pipelines (Jenkins) WEB100 Technologies
Linux Java Developer
Testing
Developed backend functionality using Core Java and Spring Framework
JUnit 5
Worked with Hibernate and SQL databases
Mockito
Implemented business logic and fixed bugs
Spring Boot Test
Gained hands-on experience with REST APIs
Basic integration testing
Supported and refactored existing codebase

Languages
English - B1+