Arsen

[відкрити контакти](див. вище в блоці «контактна інформація»)
ARSEN KORYTSKYI [відкрити контакти](див. вище в блоці «контактна інформація»)
GitHub: imismim · LinkedIn: Arsen Korytskyi
PYTHON BACKEND ENGINEER Lviv, Ukraine · Ready to work remotely

SUMMARY
Python Backend Engineer with 1+ year of commercial experience building RESTful APIs and end-to-end backend
systems. Proficient in Django/DRF and FastAPI, with hands-on experience in Celery, Redis, RabbitMQ, PostgreSQL,
and Docker. Built and shipped a SaaS application independently — payments, background task processing, and
AI-powered features. Committed to writing clean, reliable code and efficient architectural solutions.

HARD SKILLS
Languages: Python 3.x, SQL, basic C#/C++
Frameworks: Django, Django REST Framework, FastAPI, Wagtail CMS
Databases & Caching: PostgreSQL, SQLAlchemy 2.0, Alembic, Redis
Async & Queues: Celery, Celery Beat, RabbitMQ
DevOps & Tools: Docker, Docker Compose, CI/CD, Git/GitHub, Sentry, OpenAPI/Swagger
Concepts: REST API design, OOP, SOLID, Design Patterns, HTTP/HTTPS

EXPERIENCE
Insiders — Python/Django Developer Dec 2024 – Nov 2025
•Built and maintained backend systems with Django; developed RESTful APIs with Django REST Framework.
•Designed flexible content models in Wagtail CMS: custom StreamField blocks, multilingual content management.
•Implemented background processing and scheduled jobs with Celery and RabbitMQ.
•Automated deployment with Docker and CI/CD pipelines.

PROJECTS
Reservim — Booking & Payments REST API
Backend service for time-slot booking businesses: owners manage venues, resources and schedules; customers browse
availability and book slots.
•Async FastAPI service with PostgreSQL, SQLAlchemy 2.0, and Alembic; fully Dockerized stack (API, Celery worker,
Celery Beat, Postgres, Redis, RabbitMQ).
•JWT authentication with refresh token rotation and revocation via Redis; object-level authorization across the
venue → resource → slot ownership chain.
•Bulk schedule generation designed for correctness under concurrency: DB-level integrity constraints and
transactions.
•Background jobs (booking expiration, notifications) with Celery + RabbitMQ, Redis as result backend.
SaaS Application
•Built a full Django SaaS product end-to-end: subscription billing with Stripe (checkout, webhooks), transactional
emails, user management.
•Integrated AI endpoints to generate automatic summaries of user reviews.
•Offloaded slow operations to Celery workers with Redis as broker; containerized the whole stack with Docker
Compose.
Online Games Web Platform
•Backend developer on a C#/ASP.NET platform: built APIs and implemented authentication; project presented at
the IT Cluster at SoftServe.

EDUCATION
Ivan Franko National University of Lviv
Master of Systems Analysis · Sep 2025 – Dec 2026 (expected)
Bachelor of Systems Analysis · Sep 2021 – Jun 2025

LANGUAGES & SOFT SKILLS
English — Upper-Intermediate · Ukrainian — Native
Strong communication, effective team player, problem-solving, quick adaptation, attention to detail