Oleh L., Python Developer
B2 (Upper-Intermediate) English
Senior (5-10 years)
Shepetivka,
Ukraine
UTC+02:00
Summary
- 5+ years of experience in Python backend development, focused on distributed systems, REST API design, and microservice architecture;
- Experienced with FastAPI, Django, and Django REST Framework, with a deep understanding of framework internals and asynchronous programming (asyncio, Celery, Kafka);
- Experience developing and maintaining scalable APIs and high-performance backend services for AI-driven platforms, cryptocurrency systems, and automation tools;
- Solid knowledge of RDBMS systems with emphasis on PostgreSQL - database schema design, optimization, and query performance tuning;
- Experience with SQLAlchemy (declarative and async modes) and integration of data pipelines across multiple services;
- Skilled in Docker-based deployments and cloud environments (AWS, Azure) with hands-on CI/CD setup and monitoring;
- Experienced in secure authentication systems (JWT, OAuth2) and real-time data streaming using Kafka and Celery;
- Strong command of SDLC, code quality, testing (Pytest), and Agile methodologies;
- Experience in AI integration - building and deploying AI agents and workflow automation tools with LangChain, Supabase, and Firebase.
Main Skills
Python
PostgreSQL
SQLAlchemy
AI & Machine Learning
Programming Languages
Python Libraries and Tools
Mobile Frameworks and Libraries
Python Frameworks
JavaScript Frameworks
Data Analysis and Visualization Technologies
Databases & Management Systems / ORM
Cloud Platforms, Services & Computing
Azure Cloud Services
Methodologies, Paradigms and Patterns
SDK / API and Integrations
QA, Test Automation, Security
Message/Queue/Task Brokers
Deployment, CI/CD & Administration
Virtualization, Containers and Orchestration
Platforms
Mail / Network Protocols / Data transfer
Other Technical Skills
Work Experience
Python Back-End Engineer, Cryptocurrency Finance Platform
Duration: Jan 2025 - Sep 2025
Summary: Developed backend services for a high-performance cryptocurrency trading platform supporting real-time trading, wallet operations, and secure financial transactions.
Key Responsibilities:
- Developed APIs for trading and wallet operations;
- Created a real-time notification service;
- Set up and maintained cryptocurrency nodes.
Technologies: Python 3.10, Django, Django Rest Framework, FastAPI, PostgreSQL, Redis, Kafka, Celery, Docker.
Python AI Engineer, AI Automation Platform
Duration: Jun 2024 - Jan 2025
Summary: Built a web platform to help companies integrate AI into automation and management workflows, including custom AI actions and meeting note-taking.
Key Responsibilities:
- Developed both front-end and back-end features;
- Created and deployed a new AI agent;
- Created multiple AI workflows.
Technologies: Python 3.12, FastAPI, Pydantic.
Python AI Engineer, AI Assistant Platform
Duration: Aug 2023 - Jun 2024
Summary: Contributed to the development of a platform enabling the integration of AI assistants into various websites.
Key Responsibilities:
- Developed both front-end and back-end features;
- Created and deployed AI agents;
- Built a custom support chat plugin for client websites.
Technologies: Supabase, Firebase, LangChain, Psycopg2, PostgreSQL, Docker, AWS, ReactJS, TypeScript.
Python Full Stack Engineer, Integration API Platform
Duration: Oct 2021 - Aug 2023
Summary: Developed an API integration solution combining Azure, AWS, and Git into a unified platform.
Key Responsibilities:
- Developed both front-end and back-end features;
- Integrated multiple third-party services via APIs;
- Optimized partner data for user-facing applications.
Technologies: Python 3.11, FastAPI, Pydantic, LangChain, SQLAlchemy, PostgreSQL, Docker, AWS, ReactJS.
Python API Engineer, Educational Mobile App
Duration: Oct 2020 - Oct 2021
Summary: Created backend services for a mobile app designed to teach children financial responsibility by completing family-assigned tasks.
Key Responsibilities:
- Developed and maintained backend services;
- Integrated payment gateways;
- Provided ongoing application support.
Technologies: SQLAlchemy, PostgreSQL, Docker, AWS, Pytest, VueJS, TypeScript.
Python Odoo Engineer, ERP System for Sales and Inventory Management
Duration: Mar 2020 - Oct 2020
Summary: Supported ERP development focused on sales operations, inventory tracking, and reporting.
Key Responsibilities:
- Developed and maintained backend functionality;
- Integrated external store systems;
- Generated financial and sales reports.
Technologies: Python 2.7/3.6, Odoo 6/14, Django 2, PostgreSQL, AWS, Docker.
Education
- Bachelor’s in Software Engineering, National Aviation University (2020 - 2024)
- Python Developer, Web Academy