Олександр

CONTACT
YEVDOKIMOV [відкрити контакти](див. вище в блоці «контактна інформація»)

OLEKSANDR [відкрити контакти](див. вище в блоці «контактна інформація»)

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BACK-END DEVELOPER

SUMMARY
Backend developer with 2.5+ years of commercial experience, specializing in high-load Python
services built end-to-end — from architecture and API design to containerization. Worked in a
product IaaS company, gaining hands-on experience with infrastructure, billing systems, and third-
party integrations. Comfortable owning complex systems solo and delivering under tight deadlines.
Self-taught, with a strong focus on performance, clean architecture, and practical problem-solving.

EXPERIENCE
PYTHON BACK-END DEVELOPER
Riseco - Civil Registry FastAPI, PostgreSQL, MongoDB, Tortoise ORM, Celery, Docker Compose
11.2024 - Present
High-load government social assistance service — full ownership of backend
architecture and implementation
EDUCATION
Role-based access control (RBAC) with flexible permission management
OLES HONCHAR DNIPRO NATIONAL UNIVERSITY Fully dynamic reference data system with complex relations: districts, streets,
enterprises, postal offices
[BACHELOR] Modules: applicants and family members, income tracking, applications, committee
Aviation, Rocket And Space Technology protocols and decisions
09/2019 - 06/2023, Dnipro, Ukraine Comprehensive audit logging across all data interactions — create, update, delete,
download
OLES HONCHAR DNIPRO NATIONAL UNIVERSITY
Riseco - CPA project FastAPI, MongoDB, Boto3, Celery, Cloudflare, Docker Compose
[MASTER] 05.2025 - 01.2026
Aviation, Rocket And Space Technology The platform manages partner traffic, tracks performance, and automates promotion
09/2023 - Present, Dnipro, Ukraine flows for subscription-based content services.
Currently implementing advanced analytics and profitability tracking for both clients
and marketers, including CPL and RevShare offer models.
SKILLS: Optimized background tasks (Celery) for real-time and scheduled data aggregation
Three client panels: creator/agency, marketer, admin
Python Kotlin Ktor DRF Notification system, external media service integrations
Designed and implemented an end-to-end billing engine: client deposits, automated
FastAPI Django Exposed payout calculation, and withdrawal processing
Integrated NowPayments for cryptocurrency deposits
Tortoise ORM, CLI Flyway HTML Built a 24/7 background sync with the third-party API to track confirmed transactions
and referred subscribers in real time
Implemented two contract models: CPL (fixed payout per referred subscriber +
SQLite3 MongoDB Aerich
platform fee) and RevShare (percentage of each subscriber's transaction, per contract
terms). Automated accrual logic for both models — platform fee deduction, partner
Docker Compose Docker balance updates, payout request
OneCloudPlanet
React Kotlin-React PyTest 09.2023 - 10.2025
Customization and extension of an IaaS platform (Fleio/OpenStack) — billing, resource
CSS Celery GitHub management, subproduct lifecycle
Sole ownership of billing logic: payment system integrations including crypto, auto-
asyncio JWT OAuth 2.0 payments, balance management
Implemented referral program, SMS verification, Telegram notifications, open API
UnitTests authorization
PostgreSQL
Launched new subproducts end-to-end: BareMetal, GPU instances, object storage
Third-party API integrations, OpenAPI documentation
SOFT SKILLS Working with various third-party APIs.
Stress-resistant Reliable Documenting also writing documentation according to the OpenAPI standard.
Responsible Independence KOTLIN FULL-STACK DEVELOPER
Ideological Team player
OneCloudPlanet - Telegram Mini App
Communicable Decision Making
Problem Solving Adaptability 12.2024 - 10.2025
Implementation of the backend for the management of open API tokens of the main
LANGUAGE project. Using: Ktor, Exposed, Ktor HTTP Client, PostgreSQL, Docker, Flyway, UnitTests...
Ukrainian Implementation and integration Kotlin-React application of the personal account interface
English (b1) as a Telegram Mini App. Using: Kotlin-React, Ktor HTTP Client, Router, CSS emotion,
Russian Keycloak, WayForPay widget,and much, much more. Design system architecture.