Илья

PYTHON BACKEND DEVELOPER

Illia Kondratiuk
[open contact info](look above in the "contact info" section) Poznan, Poland [open contact info](look above in the "contact info" section)

PROFILE

Python Backend Developer with 3+ years of commercial experience building REST APIs, asynchronous
services, and data pipelines. Experienced with Django/DRF, asyncio, PostgreSQL, Celery, and Airflow.
Delivered workflow automation and OpenAI API integrations for a writing platform, and developed weather data
processing services with a focus on performance, testing, and production reliability.

EMPLOYMENT 3 years 5 months experience

Backend Python Developer Mar 2025 – Oct 2026

Weather Trends International
WeatherTrends360 — a weather forecasting and business analytics platform for demand and risk planning.

• Developed asynchronous services with asyncio and aiohttp. Used load testing and profiling to identify and
address performance bottlenecks.
• Built and maintained Airflow DAGs for near-real-time processing of radar and weather station data, including
GRIB ingestion, validation, and geospatial transformations.
• Converted radar imagery from PNG and TIFF into georeferenced GeoTIFF files so it could be displayed on
maps.
• Added pytest coverage and logging and helped diagnose production issues in the data pipelines.
Tech stack Python, asyncio, aiohttp, Airflow, PostgreSQL, SQLAlchemy, RabbitMQ, Redis, Docker, GitLab CI/CD, pytest, GDAL,
load testing, HTTP, REST

Backend Python Developer May 2023 – Feb 2025
QWERTY (Ukraine) Remote
Academic Writing Service

• Contributed to the design and implementation of an automated writer-assignment system, reducing manual
work for the support team and generating estimated annual operational savings of $35K–$40K.
• Integrated the OpenAI API to automate text compliance checks.
• Built an AI assistant in the admin panel to help support staff respond to clients faster.
• Developed a document conversion service to format files for client delivery and prepare them for plagiarism
and grammar checks.
Tech stack Python, Django, Django REST Framework, PostgreSQL, Celery, Redis, Docker, pytest, AWS EC2, RDS, S3, and
Lambda, OOP.

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Illia Kondratiuk PYTHON BACKEND DEVELOPER

SKILLS

Backend & APIs Python, aiohttp, Pydantic, Django, Django REST Framework, Django Admin, HTTP,
REST, OpenAI API, Swagger/OpenAPI, OOP, asyncio

Data & processing PostgreSQL, SQLAlchemy, Redis, NumPy, Airflow, Celery, RabbitMQ, GDAL, QGIS

Cloud & delivery Docker, Docker Compose, GitLab CI/CD, Git, GitLab, GitHub, AWS Lambda, AWS EC2,
AWS RDS, AWS S3, Firebase Cloud Messaging

Quality & workflow load testing, profiling, pytest, logging

EDUCATION

2020 – 2023 Lviv National Musical Academy named after Mykola Lysenko Lviv

Bachelor of Arts

LANGUAGES

Ukrainian Native Russian Native English B2 Polish B2

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