Yevhen

Yevhen Pozdieiev
Backend Python Developer
Chernivtsi, Ukraine| [відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | github.com/Ophion666 | [відкрити контакти](див. вище в блоці «контактна інформація»)

SUMMARY
Backend Python developer focused on FastAPI and PostgreSQL. Currently deepening SQL knowledge, extending
SmartBooking with new features, and practicing algorithms on Codewars.

SKILLS
Languages: Python
Backend / Web: FastAPI, REST API, WebSocket
Database: PostgreSQL, SQLAlchemy, Alembic, Redis
Infrastructure: Docker, Celery, Git
Other: JWT authentication, Stripe API, Telegram Bot API, pytest

PROJECTS

SmartBooking — FastAPI, PostgreSQL, SQLAlchemy, Redis, Celery
• Built a barber shop booking API with double-booking protection: slots lock for 10 minutes on pending payment and
auto-release via a Celery task on timeout or cancellation.
• Implemented real-time slot availability updates using WebSocket + Redis Pub/Sub.
• Added a Redis cache-aside layer for the service/master catalog, deliberately excluding live slot data since it's already
pushed in real time via WebSocket.
github.com/Ophion666/SmartBooking-Appointment-and-Payments

TelegramBot-CoinFlow — aiogram, SQLAlchemy, SQLite
• Implemented PIN-based FSM authorization to restrict access to a user's budget data.
• Built automatic category matching/creation for transactions on the fly.
• Added income/expense statistics by period and category, with percentage breakdowns sorted by share of total.
github.com/Ophion666/TelegramBot-CoinFlow

Shorty — URL Shortener & Click Analytics API — FastAPI, PostgreSQL
• Used HTTP 307 redirects instead of 301 to prevent browser caching from skewing click-tracking analytics.
• Generated 6-character short keys with collision checks to guarantee uniqueness.
github.com/Ophion666/Shorty-URL-shortener

EDUCATION
Sumy State University
Bachelor's Degree, Computer Science · Sep 2019 – Jun 2023
Sumy State University
Master's Degree, Philology · Sep 2023 – Dec 2024