Oleksii

Oleksii Chudovskyi
Backend/Fullstack Developer (Python, FastAPI)
Kyiv, Ukraine | ready to relocate | remote/hybrid/on-site
Phone: [відкрити контакти](див. вище в блоці «контактна інформація») | Telegram: @o_chudovskyi | WhatsApp: https://wa.me/+380672084588
Email: [відкрити контакти](див. вище в блоці «контактна інформація»)
GitHub: https://github.com/OleksiiChudovskyi/
LinkedIn: [відкрити контакти](див. вище в блоці «контактна інформація»)

SUMMARY
Dynamic Full Stack Engineer with 3 years of commercial experience in FinTech and E-commerce, backed
by 10 years in financial data engineering and automation. Highly proficient in building scalable,
asynchronous backends (FastAPI, Django, Flask, Kafka, RabbitMQ) and robust frontends (React, Next.js,
TypeScript). Experienced in AI engineering, actively integrating Google Gemini SDK and OpenAI APIs for
LLM-driven features and data extraction. Expert in database design (PostgreSQL, MongoDB, ClickHouse),
cloud containerization (Docker, AWS), and CI/CD. Combines deep financial domain expertise with
technical infrastructure to deliver secure, AI-enhanced enterprise applications.

SKILLS
• Programming Languages: Python, JavaScript, SQL, VBA.
• Backend Development: FastAPI, Django, Django REST Framework, Flask, FastAPI Users, FastAPI-
JSONAPI, Pydantic 2.0, Asyncio, threading, httpx, aiohttp, requests, WebSockets.
• Frontend Development: React, Next.js, TypeScript, Ajax, Fetch API, HTML, CSS, Bootstrap, Django
Templates, Jinja.
• Architecture & API Design: REST API, Monolith, Microservices, API Gateway, BFF (Backend-for-
Frontend), Event-Driven, Outbox Pattern, OOP, Swagger, Postman.
• Security & Authentication: JWT (JSON Web Tokens), OAuth 2.0, API keys, Session-based auth.
• Databases & Data Storage: PostgreSQL, Redis, MongoDB, ClickHouse, SQLAlchemy 2.0 (async),
Alembic, Django ORM, Peewee.
• Asynchronous Tasks & Message Brokers: Kafka, RabbitMQ, Celery, Celery Beat.
• AI Tools: Google Gemini SDK, OpenAI API, Prompt Engineering, AI Assistant (PyCharm).
• DevOps & Deployment: Docker, Docker Compose, Docker Secrets, Nginx, Linux Bash, AWS, Azure,
Render, Railway.
• CI/CD & Version Control: Git, GitHub, GitHub Actions, GitLab.
• Testing & Package Managers: Pytest, pytest-asyncio, unittest, Coverage, Mock, uv, Poetry, pip.
• Data Engineering & Analytics: ETL, Web Scraping, CSV/Excel processing, Power BI.

EXPERIENCE
Full Stack Engineer (Python/React) | Jul 2025 – Present (1+ year)
Bank Group (FinTech) – Kyiv, Ukraine, Remote/On-site
• Architected a centralized data ingestion platform using FastAPI to aggregate and parse financial XML
reports from 30+ banking funds, achieving 100% data consolidation and replacing legacy Microsoft
Access (VBA) workflows.
• Engineered asynchronous data aggregation services via FastAPI and Celery to fetch and scrape
financial data from 10+ external banking APIs, saving the team 10+ hours of manual work weekly.
• Developed a responsive internal management portal using React and TypeScript via Next.js,
streamlining workflows for cross-fund data auditing and administrative control.
• Containerized applications using Docker and Docker Compose, automating deployment workflows
which accelerated release cycles by 30% and ensured consistent environment staging across
services.

• Established a robust automated testing framework using Pytest and pytest-asyncio, achieving 85%+
code coverage and significantly reducing production bugs during microservice integration phases.
Stack: Python, FastAPI, Django, DRF, SQLAlchemy 2.0 (async), Pydantic 2.0, React, Next.js, TypeScript,
Celery, Redis, Docker, PostgreSQL, MongoDB, Pytest

Full Stack Engineer (Python/React) | Jun 2023 – Jun 2025 (2+ year)
Enterprise Product Company (E-commerce) – Kyiv, Ukraine, Remote/On-site
• Designed and engineered scalable, asynchronous FastAPI RESTful API microservices from scratch
integrated via API Gateway, reducing feature delivery time by 40% and improving operational
efficiency across enterprise workflows.
• Implemented an event-driven pattern for checkout microservices via RabbitMQ, offloading heavy
background processes to reduce API response latency by 35% and prevent system downtime
during peak sales events.
• Implemented Transactional Outbox pattern to ensure data consistency between microservices via
RabbitMQ/Kafka.
• Resolved concurrent purchase errors (race conditions) by implementing distributed locking
mechanisms leveraging Redis and optimizing complex PostgreSQL queries, achieving 100%
inventory data accuracy and completely eliminating duplicate orders.
• Developed a dedicated microservice to ingest and process over 1M+ daily e-commerce events
(orders, payments) from Apache Kafka into ClickHouse, building a reliable data layer for enterprise-
level PowerBI analytics.
• Built responsive, interactive frontends from scratch using React, Next.js, and TypeScript, improving
UI development velocity by 30% and ensuring real-time data flow by connecting client-side
components to FastAPI via WebSockets.
• Integrated payment gateways and handled subscription/checkout life cycle triggers.
• Optimized core performance of Django DRF and Flask monoliths by eliminating N+1 query problems
and tuning complex SQL, while integrating Celery and Redis to offload heavy operations, resulting
in a 30% reduction in database load.
• Built and maintained CI/CD pipelines using GitHub Actions and AWS, improving deployment speed.
Stack: Python, FastAPI, Django, DRF, Flask, SQLAlchemy 2.0 (async), React, Next.js, TypeScript,
WebSockets, Kafka, RabbitMQ, Celery, Redis, PostgreSQL, ClickHouse, GitHub Actions, AWS, Docker.

Financial Data & Automation Lead | 2013 – May 2023 (10 years)
Various Int. Companies (Finance, E-commerce, ERP, Renewable Energy, Agro) – Kyiv, Ukraine
Driven 10-year track record in financial data architecture, corporate budgeting, P&L modeling, and cash
flow analysis across diverse industries. Spearheaded accounting workflow transformations by
engineering automated data pipelines and dashboards using VBA/Excel and Power BI.
Stack: Python, SQL, VBA/Excel, Power BI, SAP, BAS.

LANGUAGES
English – Upper Intermediate (B2), Ukrainian – Native (C2), Russian – Advanced (C1)

EDUCATION
IT Courses & Certifications (All digital credentials and verifications are available on my LinkedIn).
2026: Udemy Courses: FastAPI, Cloud deployment (AWS), Containerization (Docker), Internet and
Computer Networks, AI (Gemini, ChatGPT), Asynchronous Patterns.
2025: FoxmindEd Mentorship: Advanced Python, OOP, Django, Flask, API, Database, code review.
2023: ITVDN: Git Basics (Branching, Merging, Remote Repositories) | Score: 1000/1000 (100%)
2022: Prometheus & LITS: Basics of Web UI Development (HTML5, CSS3, JavaScript)
2011: ACCA: Diploma in International Financial Reporting Standards (DipIFR)
University Education
2006: Zhytomyr Polytechnic State University: Specialist Degree in Accounting and Audit