Portfolio
From her first repository in September 2022 to a team graduation project and her own Spring Boot applications. The source code of every project is open on GitHub.
Telegram bot for a cat and dog shelter · 2026
Guides a visitor from choosing a shelter through consultations and adopting an animal to the new owner’s daily reports — the photo and the text can arrive in any order. Volunteers receive notifications and manage the probation period with bot commands, and a scheduled daily check tells them about overdue reports. The final decision is always made by a person.
Java 17 · Spring Boot 3.1 · Spring Data JPA · PostgreSQL · Telegram Bots API
Skypro team graduation project · 2023
The server side of a classified-ads platform built to an OpenAPI specification: registration and sign-in, ads with images, comments, user profiles and avatars, and access control with Spring Security. A team of four developers; the project repository is kept in Elena’s account.
Elena’s part: the users controller, DTOs and service; image and avatar entities; MapStruct mapping; unit tests for the mappers, the ads controller and the comments service — 35 of the project’s 88 commits.
Spring Boot · Spring Security · Spring Data JPA · PostgreSQL · Liquibase · MapStruct · OpenAPI
Online shop on Spring Boot · 2026
A fully local web application with its own file-based database: sign-in by name, a catalogue of 100 products in 19 categories with pagination, a cart stored in the database that survives a server restart, checkout that deducts stock, and order history.
Java 17 · Spring MVC · Thymeleaf · Spring Data JPA · Hibernate · SQLite
Course team project · 2023
The first, team implementation of the bot for cat and dog shelters: a Telegram interface for visitors and a REST API for animals, clients and reports.
Elena’s part: receiving and storing daily reports with photos and messaging clients about them (controller — service — repository), exceptions for the animal and owner entities, controller documentation and Javadoc, service and controller tests — 13 commits.
Spring Boot · PostgreSQL · Liquibase · Hibernate · Telegram Bot API · OpenAPI
2023
Takes a message such as “01.01.2024 20:00 Do the homework”, stores the task in PostgreSQL and checks every minute whose reminder is due. The database schema is managed with Liquibase.
Spring Boot · PostgreSQL · Liquibase · Telegram Bot API
2023
Creating, reading, updating and deleting recipes and ingredients, Swagger (OpenAPI) documentation, and export to and import from files over HTTP.
Spring Boot · springdoc-openapi · Bean Validation
Coursework · 2023
Stock-keeping for a warehouse: receiving and releasing socks, writing off defective stock, and stock levels by colour, size and cotton content; import and export of data as files, with OpenAPI documentation.
Spring Boot · OpenAPI · Lombok
2023
Stream API exercises and tests for services: JUnit 5 parameterised tests, Mockito mocks and exception checks.
JUnit 5 · Mockito · Spring Boot
2023
Data access for employees and cities through DAOs — first with plain JDBC, then with Hibernate and a one-to-many relationship between tables.
PostgreSQL · JDBC · Hibernate
Test assignment · 2023
A module that excludes flights from a set by rules: departure before the current moment, segments that arrive before they depart, and more than two hours on the ground between segments. Covered with JUnit tests.
Java · JUnit
Coursework · 2022
A console application with one-time, daily, weekly, monthly and yearly tasks: adding and removing tasks, listing the tasks for a chosen day, and input validation.
Java Core
Coursework · 2022
Employee records by department: total salary costs, minimum and maximum salary, salary indexation, and finding employees paid below or above a given amount.
Java Core
2022
Encapsulation, inheritance, generics, enums, custom exceptions and collections, modelled on vehicles, drivers, mechanics, passports and a phone book.
Java Core
The remaining course repositories — homework from 2022–2023 — are on her GitHub profile
First repository and 13 homework assignments on Java fundamentals.
Coursework 1: the staff book.
OOP: encapsulation, inheritance, generics, enums, exceptions, collections.
Coursework 2: a console daily planner.
Spring Boot: REST APIs, Swagger, file transfer over HTTP.
Coursework 3: a REST API for a sock warehouse.
Stream API and unit testing with JUnit 5 and Mockito.
SQL, JDBC and Hibernate.
A reminder Telegram bot on PostgreSQL and Liquibase.
Team project: a Telegram bot for animal shelters.
Team graduation project: the server side of the ads board.
Test assignment: flight filtering.
Her own projects: PriutBot and OnlineStore.