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Yaroslav Perekhodov
Personal Backend Developer (Python / Flask / FastAPI)
information 3 years of experience

About me:
Languages A backend developer specializing in Python and Flask with over three years of
English: Intermediate (technical commercial experience.
communication) Developed production backend systems, REST APIs, QR platforms, and
Ukrainian: Fluent tournament platforms used by over 100 concurrent users.

Technical Skills Responsible for backend architecture, deployment, and stability.

Work Experience
Backend: Python,
Aiogram, async/await, QR-Image (2025-2026)
FastAPI, Flask, BS4 Backend Developer
Databases: MongoDB, Developed and implemented backend services for a unique QR code
SQLite generation platform using Flask
Implemented an image generation pipeline, reducing QR code generation time
DevOps: Docker, Nginx, by approximately 35%
Linux (VPS deployment) Personally developed a script for generating QR codes on any image
Deployed backend services on a VPS using Docker and Nginx, ensuring a
Contacts reliable production environment
Assumed full responsibility for the backend architecture, deployment, and
Email maintenance
[відкрити контакти](див. вище в блоці «контактна інформація»)
https://t.me/zymer44 TempestCup (2024-2025)
https://github.com/Okinatorri Backend Developer
Developed and implemented a backend architecture using Python
(Flask), enabling all core platform functions.
Developed a REST API for authentication, tournament creation,
configuration, and participant management, used by all active users
Implemented role-based access control and permissions logic.
Developed a database schema and optimized queries, improving API
response time by approximately 25%.
Implemented data validation and server-side error handling, reducing
API errors by approximately 30%.
Worked closely with frontend developers to agree on API contracts to
ensure stable data exchange.

Commercial project (Education platform) (2025-2026)
Backend Developer
Implemented backend services using Python (Flask) to support live
educational events
Developed APIs for user profiles, activity tracking, and points/rewards
logic
Implemented QR-based interaction processing, enabling real-time
updates during camp activities
Ensured backend stability during live usage by 100+ concurrent users
Optimized data handling and caching, reducing request processing time
by ~20%
Worked closely with frontend developers to deliver seamless user
experience