Сергій

Sergiy Yurov
PYTHON BACKEND DEVELOPER

PROFESSIONAL SUMMARY
Python Backend Developer with production experience building
subscription billing, webhook integrations, and role-based access
control for a SaaS CRM platform. Comfortable owning a feature end-
to-end: data model, API, background jobs, and deployment.
Background as a Navigation Officer (7+ years) — brings discipline,
CONTACT attention to detail, and composure under operational pressure to fast-
paced engineering environments. Upper-Intermediate (B2) English.
Phone: [відкрити контакти](див. вище в блоці «контактна інформація»)
Email: [відкрити контакти](див. вище в блоці «контактна інформація»)
LinkedIn: [відкрити контакти](див. вище в блоці «контактна інформація»)
Telegram: @Pa4eka
GitHub: github.com/Sergunshot
WORK EXPERIENCE
Warsaw, Poland • Remote or On-site
Python Backend Developer
FluCRM — SaaS Influencer Marketing CRM
SKILLS
Sep 2025 – Feb 2026 (6 months)
Languages & Paradigms: Python 3.11+
Technologies: Python, Django, DRF, PostgreSQL, Redis, Celery, Stripe
(Decorators, Generators, Iterators), Payments (Subscriptions, Webhooks), JWT Authentication, RBAC,
Asynchronous Python (asyncio), OOP, Webhooks (HMAC), Keitaro API Integration, Docker, Docker
SOLID Principles, Design Patterns, Clean Compose, Nginx, Git,
Code
Frameworks: Django, Django REST Designed and built a proxy-layer tracking module that masks a
Framework (DRF), FastAPI, Flask third-party tracking engine (Keitaro) behind native-looking FluCRM
Databases & Caching: PostgreSQL, endpoints — normalizing click/conversion data across multiple
MySQL, SQLite, Redis, SQLAlchemy 2.0, advertisers while keeping vendor API keys server-side only.
Django ORM, Alembic →
Built the click/conversion redirect flow (GET /t/{token} vendor
API & Integrations: RESTful API Design, campaign URL) with local logging and S2S postback handling,
JWT Authentication, RBAC, Stripe API designed to keep redirect latency low under load.
(Subscriptions, Webhooks, HMAC Designed and implemented JWT authentication with role-based
verification), Telegram Bot API, Webhook access control (RBAC) across 15+ API resource groups
handling (Influencers, Campaigns, Tasks, Analytics, Notes, Admin Tools,
Background Jobs & Async Processing: etc.), securing access for multiple user roles.
Celery, Redis, Django Celery Beat, Built a Stripe-based subscription billing module (plans, recurring
scheduled tasks payments, webhook handling with HMAC signature verification),
Infrastructure & DevOps: Docker, Docker enabling automated monetization for the CRM's SaaS tier.
Compose, Nginx, Git/GitHub, CI/CD Built analytics endpoints aggregating campaign and influencer
basics, AWS S3, MinIO performance data (clicks, conversions, revenue, CR, EPC) for
Testing & Quality: pytest, Test-Driven internal dashboards.
Development (TDD), unit/integration/e2e Collaborated in an Agile team using Git-based workflows (feature
testing branches, code review, pull requests).
Algorithms & Data Structures: Arrays,
Linked Lists, Stacks, Queues, Hash Maps, PORTFOLIO PROJECTS
Hash Sets, algorithm complexity
AI-Assisted Development: Claude Code, Online Cinema API
Gemini (debugging, code review, problem-
solving)
 LANGUAGES Technologies: Python 3.11+, FastAPI,
SQLAlchemy 2.0, Alembic, PostgreSQL, Redis,
Ukrainian – Native Celery, Stripe API, MinIO (S3), Docker, Nginx, JWT
Russian – Native Authentication
English – Upper-Intermediate (B2) A production-ready FastAPI backend for an online
Polish – Beginner (A1) cinema platform.
Implements user management, movie catalog
EDUCATION & with advanced filtering, cart and orders, payment
CERTIFICATION processing via Stripe, and asynchronous
background jobs with Celery.
Odessa National Maritime Deployed in Docker containers with Nginx reverse
University (ONMU) | 2012-2016 proxy and protected API documentation.

Bachelor Degree, Navigator
Implemented JWT auth with email activation
(24h token TTL), password reset, and one-time
Python course at Mate academy
refresh token rotation.
(OOP, Python, Django, DRF,
Built movie catalog with filtering (year/IMDb
FastAPI) 2024-2025
range/genre/director/ star), dynamic sorting,
and social features (likes, comments with
replies, 10-point ratings, favorites).
Designed Stripe payment flow with webhook
handling for
payment_intent.succeeded/canceled and
charge.refunded events.
Wrote unit, integration, and e2e tests using
pytest and httpx AsyncClient, with fakes/stubs
for email and storage layers.
Protected API docs (Swagger/Redoc) behind
Nginx Basic Auth in prod.
GitHub: Online Cinema API

Library Service API
Technologies: Python, Django 5+, Django REST Framework (DRF),
PostgreSQL, Celery, Redis, Stripe API, Docker, Telegram Bot API, JWT
Authentication
A backend RESTful service for managing a library system with full
CRUD functionality for books, users, and borrowings.

Full CRUD operations for books, users, and borrowings
JWT authentication and role-based access control
Integration with Stripe for online payments and fines
management
Integrated Flower for real-time Celery task monitoring.
Built Telegram bot notifications for borrowings, payments, and
overdue tracking via python-telegram-bot + Celery Beat
scheduled jobs.
Documented API via DRF Spectacular (Swagger/Redoc).
Achieved 94% test coverage using Django's coverage tool.

GitHub: Library Service API