Denis

Denis Skorodumov
Python Backend Developer
[open contact info](look above in the "contact info" section) · [open contact info](look above in the "contact info" section) · Kharkiv, Ukraine

SUMMARY Python Backend developer with commercial experience in C#/.NET Core and Python. Main stack: FastAPI,
Celery, Redis, Docker. Worked on SaaS-based platforms, AI-integrations, high-load API and Telegram-bots.
Have experience as Tech Lead: defining API-contracts, reviewing frontend implementations, coordinating
feature delivery.

SKILLS Languages: Python, C# (previous commercial experience)
Frameworks and libraries: FastAPI, SQLAlchemy, Async, Celery, aiogram, APScheduler, pandas
Infrastructure: PostgreSQL, Redis, Docker, Nginx, GitHub Actions (CI/CD), Postman
API and integrations: Meta Ads API, Telegram Bot API, RapidAPI, n8n
AI API: OpenAI, Anthropic Claude, Whisper
Protocols: REST API, WebSocket
English: A2

EXPERIENCE
Feb — July 2026 Python Backend Developer (Tech Lead) Remote
• Built the entire backend of a multi-tenant SaaS-based platform for advertising agencies: managing Tour
Sales, analytics for Meta Ads and UTM Builder in a single system.
• Designed a multi-environment architecture (development / internal / external) with isolation via table
prefixes, authentication via JWT + Google OAuth 2.0 and a granular RBAC system (3 roles, 9 permission slugs,
subscription plan restrictions).
• Built a Meta Ads data collection pipeline: 15-phase initial sync with checkpoint-based recovery, tiered
incremental sync (every 15 min for pro/team), and WebSocket streaming of progress to the frontend.
• Built TrackerPod — a campaign aggregation container with two tracking modes (tour_show / custom_goal),
KPI-dashboard with sparkline data, funnel breakdown (F1/F2/F3), and placement analytics.
• Led frontend developers as Tech Lead: defined API-contracts, reviewed implementations, and coordinated
feature delivery.
2025 Python Backend Developer Remote
• Built a high-performance FastAPI proxy for anonymous access to Instagram content (Stories, Posts, Reels,
Highlights) with multi-provider failover across 3 RapidAPI scrapers.
• Implemented Redis-based caching with TTL by content type and monthly per-provider quota tracking; built
an adaptive fallback chain that skips exhausted providers without wasting quota.
• Maintained two parallel versions of the app (new + legacy) in a single Docker Compose setup during the
mobile client migration.
2025 Python Backend Developer Remote
• Built a service that accepts audio/video files or URLs (TikTok, YouTube, Instagram, Spotify) and generates
prompts for AI music platforms (Suno, Udio, LMNT, Mubert).
• Ran two AI analyses in parallel via asyncio.gather(): OpenAI Whisper-1 for speech transcription and a custom
Sound Embedding API for genre, BPM, mood, and key detection.
• Integrated Stripe payments with a token-based access system and a Telegram-bot for user interaction.
2025 Python Backend Developer Remote
• Built a service for cleaning and exporting client lists to Meta, Google Ads and TikTok with per-platform
formatting and SHA-256 hashing.
• Integrated Anthropic Claude / OpenAI for AI-based data enrichment: extracting names from email addresses
and gender detection.
• Built both a Streamlit and a FastAPI backend with WebSocket-based progress events.
2025 Python Backend Developer Remote
• Built a backend service for collecting and routing events from mobile apps into Notion and Telegram.
• Implemented an async architecture on FastAPI + Celery + Redis; integrated the Notion API and Telegram Bot
API with retry logic and exponential backoff.
2025 Python Backend Developer Remote
• Built a microservice for monitoring Instagram Stories of tracked accounts and sending push notifications via
Firebase Cloud Messaging (FCM HTTP v1).
• Implemented an adaptive check schedule (from 30 min to 24 h) based on account activity category (NEW /
ACTIVE / MEDIUM / RARE / SLEEPING), and orchestration via n8n.
2025 Python Backend Developer Remote
• Built a Telegram-bot that queries Google BigQuery (exported from Firebase Analytics) and generates revenue,
conversion, and geo reports on a schedule and on demand.
• Implemented drop alerts (< 50% of the 7-day average) and zero-conversion alerts via APScheduler cron jobs.
2024 Python Backend Developer Remote
• Built a Telegram-bot for managing video editing orders with RBAC (superadmin, admin, executor, client) and a
full order lifecycle: creation, correspondence, and delivery of the result.
2024 Python Backend Developer Remote
• Built an async Telegram-bot to automate job application intake with candidate identification via Instagram;
designed a multi-bot architecture that runs multiple bots from a single process via configuration.

ADDITIONAL EXPERIENCE
Oct 2023 — Mar 2024 C# Backend Developer Remote
• Built gateways for crypto wallets: Bitcoin, Ethereum, Polkadot, Cosmos, Solana, Avalanche (X-Chain / C-Chain),
Fantom, BNB BEP2/BEP20, USDT ERC20/TRC20.
• Implemented functionality for interacting with these blockchain networks via REST API на ASP.NET Core.
Mar 2024 — May 2024 C# Backend Developer Remote
• Built the server and client parts of the application: REST API на ASP.NET Core, a desktop client on WinForms
using .NET Core.
Sep 2022 — Oct 2023 C# Backend Developer Remote
• Handled streaming upload of filtered and archived data using various archivers to different storage
destinations (AWS, Azure, Dropbox, SFTP, FTP).

EDUCATION
June 2025 — July 2026 Employment at TikStats OU
June 2024 — Mar 2025 Employment at SolidWay
Sep 2022 — Dec 2023 Master's degree, Kharkiv Polytechnic Institute
Major: Digital Hydraulics.
Sep 2019 — June 2022 Bachelor's degree, Kharkiv Polytechnic Institute
Major: Hydraulic and Pneumatic Automation of Oil and Gas Equipment.

Sep 2015 — Jun 2019 Junior specialist, Kharkiv Computer and Technology Vocational College of NTU "KhPI"