Даніла

DANILA CHETVERTNOV
P Y T H O N D E V E L O P E R

PROFILE
[открыть контакты](см. выше в блоке «контактная информация») Python Backend Developer with 5+ years of experience building and
maintaining production systems.
danilachetvertnov@gmail. I specialize in designing scalable backend architectures using Python, with a
com strong focus on FastAPI and async technologies. I have hands-on experience
delivering systems from scratch, improving legacy codebases, and taking full
@NoPaint
ownership of backend development in cross-functional teams.
My expertise includes API development, database design, performance
https://www.linkedin.com
/in/danila-chetvertnov/ optimization, and integration with third-party services such as payment systems
and cloud storage.
In addition to full-time roles, I have successfully delivered multiple freelance
projects end-to-end — from architecture design to deployment — focusing on
scalability, reliability, and clean code.

SKILLS EXPERIENCE
Operating Systems
FREELANCE PYTHON BACKEND May, 2025 - Present
Linux (Ubuntu 16.04–22.04)
DEVELOPER
Backend
Python (3.8–3.13) Designed and developed backend systems for multiple clients,
FastAPI delivering production-ready solutions from scratch.
Aiohttp Designed scalable backend architectures based on business
Django (basic) requirements
Databases Built async REST APIs using FastAPI
PostgreSQL Implemented authentication and authorization (JWT-based)
Redis
Designed and optimized PostgreSQL databases and queries
MongoDB
Integrated third-party services (payments, external APIs, cloud
SQL (raw queries, optimization)
storage)
ORM
Developed real-time features using WebSockets
SQLAlchemy
Peewee Containerized applications using Docker and configured
Tools & DevOps deployment environments
Docker Refactored and improved existing codebases for better
GitLab CI/CD performance and maintainability
AWS S3
Other
REST API design
Async programming
WebSockets
Telethon
System Design
 PYTHON DEVELOPER Feb, 2025 - May, 2025
ACHIEVEMENTS
Dinamicka
Designed backend architectures for
Took full ownership of backend development and architecture
multiple production systems from
in a cross-functional team.
scratch
Designed and delivered backend architecture for 2
Took full ownership of backend in cross-
functional teams production systems from scratch
Successfully maintained and modernized Worked as the sole backend developer, collaborating with
several legacy systems frontend, DevOps, and QA
Improved API performance and database Maintained and improved several legacy systems with
efficiency through optimization, limited documentation
significantly reducing response time Refactored critical parts of the codebase to improve
(from ~4 seconds to under 1 second) performance and maintainability
Delivered freelance projects end-to-end Built scalable async APIs using FastAPI and aiohttp
(architecture → deployment) Designed and optimized database structures (PostgreSQL,
Reduced system complexity through
Redis, MongoDB)
refactoring and architectural
Improved data access patterns and query performance
improvements
Integrated AWS S3 for file storage and media handling
Set up CI/CD pipelines using GitLab
EDUCATION Containerized services and managed environments using
Docker
NATIONAL AVIATION
UNIVERSITY Introduced unit testing practices to improve code quality

Sep 2011 - Feb 2016 PYTHON DEVELOPER Oct, 2021 - Sep, 2024
Dicomas
Department of Computer Science
Worked on development and improvement of backend systems in
Specializing in Analysis and Processing
production environment.
of Flight Information
Developed and maintained backend APIs for production systems
Migrated legacy Python codebase to modern versions (3.5 → 3.8+)
Refactored architecture and improved overall system performance
Optimized PostgreSQL queries and database interactions
Improved ORM layer using Peewee
Integrated payment systems (Interkassa, AdvCash)
Designed modular components for better code reuse
Integrated HTTP server into API services
Containerized applications using Docker
Wrote unit tests and improved system reliability

SUPPORT QA Feb, 2021- Sep, 2021
L3 TECHNICAL ENGINEER Oct, 2019- Feb, 2021
L2 TECHNICAL ENGINEER Oct, 2019-Mar, 2019