Open to opportunities

Олег User

@user174

Message

Python backend developer with 4+ years building reliable REST APIs and integrations.

Belarus

Message

What I'm looking for

I’m looking for a role building robust Python backend services and REST APIs, focused on performance optimization, reliability, and clean engineering practices—where I can design architectures, improve CI/CD, and keep improving test coverage.

I’m a Python Backend Developer with 4+ years of commercial experience, designing and developing backend services, REST APIs, and integrations. I focus on building robust systems and improving engineering processes through careful requirements analysis, task decomposition, and technical planning.

In my recent roles, I’ve worked across monolithic and microservice architectures, refactoring legacy code, performing data migration, and optimizing performance to improve service reliability. I also use Python tooling like Django/Django REST Framework (and FastAPI), along with PostgreSQL/MySQL, Redis, Celery, and RabbitMQ to deliver dependable backend functionality.

I’m hands-on with reliability and delivery: I write automated tests with pytest, containerize applications with Docker/Docker Compose, and support CI/CD using GitLab CI. In particular, I increased test coverage by 20–30%, reduced API response time by 10–20%, and lowered the number of post-release bugs by 15–25%.

Experience

Work history, roles, and key accomplishments

Current

Python Backend Developer

Current

Apptimism

Dec 2023 - Present (2 years 6 months)

Designed and built backend services for monolithic and microservice architectures, developing REST APIs and third-party integrations. Increased test coverage 20–30%, reduced API response time 10–20%, and lowered post-release bugs 15–25% through legacy refactoring, performance optimization, and reliability improvements.

Python Django Django REST Framework PostgreSQL Redis Celery RabbitMQ Docker Pytest Gitlab CI

Python Backend Developer

BIVIAR Partners

Jul 2022 - Dec 2023 (1 year 5 months)

Designed backend architecture for an ERP system using Django/DRF and implemented integrations with third-party APIs. Refactored legacy code, improved performance, added automated testing with pytest, and strengthened CI/CD and deployments with Docker on Linux.

Python Django Django REST Framework Celery RabbitMQ MySQL Docker Gitlab CI Pytest Postman

Backend Developer (Personal)

Personal Project

May 2021 - Nov 2021 (6 months)

Built a Django REST API using Python with PostgreSQL, Redis, Celery, and RabbitMQ, containerized with Docker. Deployed to Amazon EC2 and validated backend functionality with pytest.