Марина

Maryna Yatsenko
Java Developer | Software Engineer

Recent Software Engineering graduate with strong Java development skills and a solid foundation in building and maintaining backend systems.
Experienced with relational databases and REST APIs. Built practical projects including a Java chatbot used daily by 20+ users and a full-stack chess web
application. Passionate about clean backend design, writing efficient SQL queries and integrating database logic into backend applications with or without
ORMs. Highly motivated to contribute and grow within a software engineering team.

EDUCATION
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Bachelor of Software Engineering
National University of Kyiv-Mohyla Academy
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09/2021 - 06/2025, Kyiv, Ukraine
Relevant courses
Object-Oriented Programming Object-Oriented Analysis and Design
Dublin, Ireland
Algorithms and Data Structures Design of Software Systems
Web Development Tools and Principles Databases
[открыть контакты](см. выше в блоке «контактная информация») Automation of Work with Software Projects in Scrum
Java Language

github.com/cryst321

WORK EXPERIENCE
SKILLS
Freelance work
• Languages & Frameworks: Java
(Spring Boot, JDBC, XML), MS SQL to Excel Exporter
Python, JavaScript (Node.js, 08/2025 - Present,
React.js) Achievements
Delivered a cross-platform Python tool for a local company to automate extraction of filtered data from MS
• Databases: PostgreSQL, SQL Server into formatted Excel reports.
MySQL, SQLite, MongoDB, Implemented GUI-based parameter selection and secure query execution with pyodbc and pandas.
relational database design, JDBC, Developed and delivered within two days and iterated based on feedback. The tool remains in use by a 5-
working with ORMs (Hibernate) person team to date.

• Web Development: HTML5,
Degree project
CSS/SCSS, RESTful APIs, JSON
Web application for retrieving similar chess positions
02/2025 - 06/2025, Kyiv, Ukraine
• Build & Automation: Maven, National University of Kyiv-Mohyla Academy
Gradle (Java); npm (JavaScript)
Achievements
Designed and built a full-stack interactive web application (React + Spring Boot) for finding past games
• Testing: JUnit, Mockito
where a chess position similar to the query occur red.
Implemented a custom encoding algorithm to convert board states into textual representations capturing
• Deployment & DevOps: CI/CD, structural and tactical relations between pieces.
Docker, Heroku
Indexed over 10,000 chess positions using Apache Lucene with the BM25 ranking function to enable fuzzy
search and relevance-based retrieval.
• Tools & Practices: Git, GitHub,
Designed and optimized a PostgreSQL schema and JDBC-based data layer (without ORM) for fast
pgAdmin, basics of Agile/Scrum
synchronization between the database and Lucene index.
practices

• IDEs: IntelliJ IDEA, WebStorm,
Personal Project
PyCharm (4 years’ experience Java Chatbot with Google Sheets Integration
using JetBrains IDEs) 03/2023 - 01/2025,
Achievements
Built and deployed a Java chatbot automating spreadsheet-based task management.
Managed Google Sheets API communication, ensuring reliable data flow.
LANGUAGES Maintained the application over a 7-month period, reliably supporting 20–30 daily users and demonstrating
expertise in long-term backend health and stability.
English
Full Professional Proficiency

Ukrainian
Native or Bilingual Proficiency CERTIFICATES
Russian Python for Data Science, AI & Development
Native or Bilingual Proficiency Issued by IBM, April 2025