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EXPERIENCE

Back-End Java Developer
Lerner - language learning platform (June 2025 – Present)
• Completed: Built a Spring Boot REST API with JWT security,
Liquibase migrations, PostgreSQL persistence, Dockerized
environment, and comprehensive testing (JUnit, Mockito,
Testcontainers).
• In Progress:
• Vector Search & NLP Implementation: Engineered a Spring Boot
service with DJL to serve Sentence-BERT/LaBSE models for contextual
learning sentence generation.
• Data Indexing & Persistence: Implemented PostgreSQL + pgvector
for semantic vector search, replacing external vector DBs.
• Lexical Analysis Pipeline: Integrated Stanford CoreNLP / Apache
MAKSYM OpenNLP for lemmatization and POS tagging to enhance lexicon
accuracy.
VOLKIVSKYI
Book Store Application
JAVA DEVELOPER
• Built a full-stack backend application for an online bookstore.
• Features: user registration and authentication, role-based access
control, shopping cart, order management, category and book
management.
• Technologies: Java 17, Spring Boot, Spring Security, Hibernate,
SUMMARY MySQL, Liquibase, JUnit, Docker.
• GitHub Code
Java Developer with strong skills in back-end
development using Java 17, Spring Boot, Task Management System
Hibernate, and MySQL. Experienced in building
secure REST APIs, working with relational
• Developing a platform to manage projects, tasks, and user roles.
• Features: project creation, task assignment, soft delete, user profile
databases, and writing unit/integration tests. updates, JWT security.
Passionate about clean code, performance • Technologies: Java 17, Spring Boot, Spring Security, Hibernate,
optimization, and continuous learning. MySQL, Liquibase, Testcontainers.

Electrical Accessories and Automation
Manager
TECHNICAL SKILLS S.V.I.T. Plus (June 2020 – Present)
Development of projects, selection, and calculation of electrical
Programming Languages: Java 17
accessories and equipment for automation according to the technical
Backend: Spring, Spring Boot, Spring specifications
Security, Hibernate, JPA
Databases: MySQL, Liquibase
Manager for the expansion of sales markets
Testing: JUnit, Mockito, Testcontainers
for electrical products
ABB Group (April 2019 – June 2020)
DevOps & Tools: Docker, Git, Postman,
Swagger, Maven
Other: REST API design, JWT
Authentication, OOP, SOLID, GitHub Version EDUCATION
Control Tools: Git
IDE: IntelliJ IDEA
Languages: English - Intermediate National Technical University of Ukraine "Igor
Sikorsky Kyiv Polytechnic Institute"
CONTACTS
Master's degree in Electrical energetics, electrical
[open contact info](look above in the "contact info" section) (@MaksVolkivskyi)
engineering, and electromechanics Dates attended: 2012–
[open contact info](look above in the "contact info" section)
GitHub 2018
Kyiv, Ukraine

ADDITIONAL EDUCATION

Project 12 English course (Pre-Intermediate)
Green Forest English course (Intermediate)