Денис

Education

Odesa National Polytechnic University Bachelor • A
Computer science 4 years

Odesa National Polytechnic University Master • A
Computer science 3 semesters
Denys Serebriakov
Middle back-end developer (Python) Experience

Stealth FinTech / Web3 Startup
 [open contact info](look above in the "contact info" section)
Software Engineer (Backend & DevOps focus) July 2024 - Present
 @crispy_caramel
Key Achievement: Engineered a high-performance PvP Betting Platform
5 years of commercial on the TON blockchain. Implemented Provably Fair mechanics and

development automated commission-based reward distribution, ensuring
transparency and trust for the user base.
Trading Systems: Developed a custom Trading Terminal (Thin Client) for
Skills
Polymarket, enabling full-cycle betting operations (deposits, order
 FastAPI management, withdrawals) via a streamlined Telegram interface.
Middlewares, DTO, complex routing,
Automation & Data Mining:
etc.
Designed an OSINT monitoring system for real-time tracking of
Twitter activity and blockchain transactions, utilizing pattern
 SQLAlchemy matching for alpha-discovery.
Models, DAO, migrations via alembic,
Architected a Domain Lifecycle Monitor using Playwright and
etc.
WHOIS protocols to automate the identification and notification of
high-value expiring domains.
 aiogram Infrastructure & Ownership:

Serving as the sole Backend/DevOps engineer, responsible for the
 PostgreSQL entire lifecycle: from database schema design
Data arch, indexing, query-building, (PostgreSQL/SQLAlchemy) to server-side deployment via Docker
etc. and systemd.
Optimized application performance by implementing Redis-based
caching and asynchronous task processing.
 MySQL
Data arch, indexing, query-building,
Crypto Ads Platform / Fintech Solution Provider
etc.
Backend Developer October 2023 - June 2024
Legacy Transformation: Executed a comprehensive architectural
 Redis refactoring of a legacy codebase (5,000+ SLOC). Migrated the core system
Short TTL cache, queues, etc. 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
 nginx
Reverse proxy, balancer, etc. Telegram Bot/Web App ecosystem, focusing on high-load stability and
data integrity.
Collaborative Development: Worked within a distributed team,
 Docker participating in Code Reviews and establishing Git-flow standards to
Basic containers management ensure high code quality and streamlined releases.
(primarily with composer usage)
Bespoke Automation & Backend Solutions
Independent Software Contractor (Freelance) July 2021 - September 2023
 Linux (Ubuntu/Debian-based)
systemd, apt, different CLI tooling, Custom Business Automation:
etc. Developed and deployed over 15+ custom Telegram-based
ecosystems for small and medium enterprises, focusing on CRM
integrations, automated sales funnels, and customer support
Languages automation.
English Reduced manual workload for clients by an average of 40% through
the implementation of tailored Python scripts and internal workflow
tools.
Ukrainian
Advanced Web Scraping & Data Analysis:

Engineered robust data extraction pipelines for e-commerce and
Russian
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.