Денис

DENIS KOLESNICHENKO
JUNIOR PYTHON BACKEND DEVELOPER

CONTACT PROFILE

WhatsApp: [відкрити контакти](див. вище в блоці «контактна інформація») Motivated Junior Python Backend Developer focused on building REST APIs
and backend services using FastAPI, PostgreSQL, SQLAlchemy, and Docker.
Telegram: @DnzQs Passionate about backend development, software architecture, and clean code
[відкрити контакти](див. вище в блоці «контактна інформація») practices. Experienced in developing authentication systems, database-driven
applications. Continuously learning and improving through practical projects
Bulgaria and real-world development workflows.
GitHub: https://github.com/DnzQs
WORK EXPERIENCE
Personal Backend Projects 2025 – PRESENT
SKILLS Python Backend Developer
Python
Developed RESTful APIs using FastAPI and SQLAlchemy.
FastAPI
Implemented JWT authentication and authorization.
SQLAlchemy Designed relational database schemas with PostgreSQL.
PostgreSQL Containerized applications using Docker and Docker Compose.
REST API Development Built and tested backend services following modern development practices.
Worked with Git and GitHub for version control.
JWT Authentication
Docker
GitHub
Notes API 2026--2026
Pytest Personal Backend Project
Pydantic
Developed a RESTful API for note management using FastAPI.
OOP
Implemented user registration and JWT-based authentication.
Problem Solving
Integrated PostgreSQL with SQLAlchemy ORM.
Clean Code Designed database models and relationships.
Implemented full CRUD functionality for notes.
LANGUAGES
Added user ownership protection and authorization checks.
Containerized the application using Docker and Docker Compose.
English - B2 (upper intermediate) Wrote automated tests with Pytest.
Russian - Native Managed source code with Git and GitHub.
Ukranian - Native Tech Stack: Python, FastAPI, PostgreSQL, SQLAlchemy, JWT, Docker,
Pytest
Github: https://github.com/DnzQs/NOTES-API

CAREER OBJECTIVE
EDUCATION
Seeking a Junior/intern Python Backend Developer or
Backend Internship position where I can contribute to
real-world projects, continue improving my backend
Python Backend Development Course 2025 – 2026
development skills, and grow as a software engineer. Genius Space
https://drive.google.com/file/d/1byZTypgFOQVa5JnX8r
IPjbfjdLKcFpET/view

Self-Taught Backend Developer 2025 – Present
Focused on: Python, FastAPI, PostgreSQL,
SQLAlchemy, Docker, GitHub, Testing