Denys Serebriakov
Middle back-end developer (Python)
Skills
FastAPI
Middlewares, DTO, complex routing, etc.
SQLAlchemy
Models, DAO, migrations via alembic, etc.
aiogram
PostgreSQL
Data arch, indexing, query-building, etc.
MySQL
Data arch, indexing, query-building, etc.
Redis
Short TTL cache, queues, etc.
nginx
Reverse proxy, balancer, etc.
Docker
Basic containers management (primarily with composer usage)
Linux (Ubuntu/Debian-based)
systemd, apt, different CLI tooling, etc.
Languages
English
Ukrainian
Russian
Education
Odesa National Polytechnic University
Bachelor • A
Computer science
4 years
Odesa National Polytechnic University
Master • A
Computer science
3 semesters
Experience
Stealth FinTech / Web3 Startup
July 2024 – July 2026
Software Engineer (Backend & DevOps focus)
•
Key Achievement: Engineered a high-performance PvP Betting Platform on the TON blockchain. Implemented Provably Fair mechanics and automated commission-based reward distribution, ensuring transparency and trust for the user base.
•
Trading Systems: Developed a custom Trading Terminal (Thin Client) for Polymarket, enabling full-cycle betting operations (deposits, order management, withdrawals) via a streamlined Telegram interface.
•
Automation & Data Mining:
•
Designed an OSINT monitoring system for real-time tracking of Twitter activity and blockchain transactions, utilizing pattern matching for alpha-discovery.
•
Architected a Domain Lifecycle Monitor using Playwright and WHOIS protocols to automate the identification and notification of high-value expiring domains.
•
Infrastructure & Ownership:
•
Serving as the sole Backend/DevOps engineer, responsible for the entire lifecycle: from database schema design (PostgreSQL/SQLAlchemy) to server-side deployment via Docker and systemd.
•
Optimized application performance by implementing Redis-based caching and asynchronous task processing.
Crypto Ads Platform / Fintech Solution Provider
October 2023 – June 2024
Backend Developer
•
Legacy Transformation: Executed a comprehensive architectural refactoring of a legacy codebase (5,000+ SLOC). Migrated the core system to an asynchronous stack (FastAPI / SQLAlchemy), resulting in improved maintainability and a 30% reduction in technical debt.
•
Feature Engineering: Developed and integrated new modules for a hybrid Telegram Bot/Web App ecosystem, focusing on high-load stability and data integrity.
•
Collaborative Development: Worked within a distributed team, participating in Code Reviews and establishing Git-flow standards to ensure high code quality and streamlined releases.
Bespoke Automation & Backend Solutions
July 2021 – September 2023
Independent Software Contractor (Freelance)
•
Custom Business Automation:
•
Developed and deployed over 15+ custom Telegram-based ecosystems for small and medium enterprises, focusing on CRM integrations, automated sales funnels, and customer support automation.
•
Reduced manual workload for clients by an average of 40% through the implementation of tailored Python scripts and internal workflow tools.
•
Advanced Web Scraping & Data Analysis:
•
Engineered robust data extraction pipelines for e-commerce and real estate clients using Playwright and BeautifulSoup4, handling complex anti-bot protections and dynamic JS rendering.
•
Built automated data processing engines that transformed raw unstructured data into actionable insights stored in optimized PostgreSQL databases.
•
Full-Stack Project Delivery:
•
Managed the end-to-end development lifecycle for diverse projects, from database schema design (SQLAlchemy) to frontend implementation in Telegram Web Apps (TWA).
•
Provided infrastructure consulting, setting up secure and scalable environments on Linux (Ubuntu) VPS using Nginx, Docker, and SSL/TLS encryption.
•
Third-Party Integrations:
•
Integrated various external services, including payment gateways (Stripe, Crypto-pay), social media APIs, and cloud storage solutions, ensuring seamless data flow across platforms.