Oleksii

OLEKSII BODNARCHUK
PYTHON DEVELOPER
Ivano-Frankivsk, Remote | [відкрити контакти](див. вище в блоці «контактна інформація») | LinkedIn | Telegram [відкрити контакти](див. вище в блоці «контактна інформація»)

SUMMARY

Python Backend Developer with 3 years of commercial experience focusing on FastAPI, asynchronous
architectures, and PostgreSQL. I build reliable, well-documented APIs, cover core flows with tests, and work
confidently with SQLAlchemy, Alembic, and CI/CD pipelines. My recent projects include an AI-driven trade
signals platform with auto-trading via IBKR, payment subscriptions via Stripe). I am comfortable in cloud
environments (AWS, GCP), API gateways, and modern web stacks where Python backends interact with JS-
based frontends. A background as a business owner and strong problem-solving skills (Math/Informatics
competitions) help me communicate clearly with stakeholders and take ownership of features end-to-end.

TECHNICAL SKILLS
Python 3.x PostgreSQL JavaScript (ES6+) Docker & Docker Compose
FastAPI, Flask SQLAlchemy, SQLModel HTML5 / CSS3 Linux & Bash
Django, DRF Alembic Migrations Jinja2/django Templates Git, GitLab CI/CD
Async Programming Query Optimization OAuth2 / Third-party Auth Pytest & unit testing)
RESTful API Design AWS & GCP (GCS) Stripe Payments LLM, OpenAI API Integrations

PROFESSIONAL EXPERIENCE
Python Backend Developer — 1WorldOnline R&D Center (Kebeta.ai, Alphagrail.ai) Dec 2022 - Present
Built and maintained a FastAPI backend for AI-driven trading platforms (Kebeta.ai, Alphagrail.ai)
delivering daily market signals and analytics.
Migrated the core APIs to a fully async stack (FastAPI, SQLModel, asyncpg), achieving up to 3× higher
throughput under load.
Designed PostgreSQL schemas and Alembic migrations; optimized data pipelines and heavy analytical
queries using Pandas and Fastparquet.
Implemented Stripe-based subscriptions (trials, upgrades/downgrades) with real-time webhooks and
custom billing logic.
Integrated Telegram and other third-party auth providers plus Cordova mobile clients, improving user
activation and engagement.
Set up CI/CD with GitLab and Docker, deployed services to AWS (incl. Kong Gateway), and added
monitoring to keep APIs stable.
Wrote Sphinx documentation and Pytest test suites for critical services.
Python Mentor - Hillel IT school May 2025 - Present
Teaching a group of adult students transitioning into IT, covering core Python concepts and guiding
them through practical tasks and mini-projects.
Business Owner — Self-employed 2017 – 2022 · Lviv, Ukraine
Launched and ran small local businesses (taxi, construction), handling operations, budgeting,
marketing, and sales.
Tracked key metrics (revenue, costs, basic analytics) to improve decisions and profitability.
Developed strong communication, negotiation and self-management skills, now helpful in working with
product managers and stakeholders.

EDUCATION

Python developer course - Mate аcademy May 2022 - Nov 2022
Bachelor Degree in civil engineering - Lviv Polytechnic National University Sep 2010 - Jul 2014

ADDITIONAL INFORMATION
Languages: English - Upper intermediate (В2), Ukrainian - Native