Arsenii Viaznikov
Conversational English
Development of complex web applications and bot systems from scratch. Deep understanding of fundamental technologies (Native JS, Async Python, Linux (Debian)), allowing me to build optimized, secure solutions without framework dependency.
Technical Skills
Backend
Core & Web
Python 3.10+
FastAPI
Quart
Aiohttp
Hypercorn
Data & Crypto
PostgreSQL
SQLAlchemy
SQLite
Cryptography
Pydantic
Discord Eco
Disnake
Discord.py
Frontend
Vanilla JS (ES6+)
DOM API
Event Loop
Web Crypto API
Web Audio API
Canvas API
WebSocket
Frameworks & UI
Vue 3
Three.js
HTML5/CSS3
Flex/Grid
DevOps
Infrastructure
Linux (Debian)
Bash
Nginx
Systemd
UFW/Iptables
Tools
Docker
Git
FFmpeg
Professional Experience
Secure Messenger Development (Full Stack)
Stack: Python (Quart, Hypercorn), Vanilla JS, Web Crypto API
- Created SPA with Zero-Knowledge architecture and E2EE (End-to-End Encryption).
- Implemented client-side encryption via window.crypto.subtle (PBKDF2, RSA-OAEP, AES-GCM).
- Custom voice/video recording module (MediaRecorder API) with waveform visualization.
- Large file uploads with progress bar via XMLHttpRequest.
- Image optimization (WebP conversion on client via Canvas).
- XSS protection (Bleach) and SQL injection prevention, secure sessions (HMAC + Argon2).
Music Ecosystem and Admin Bots
Stack: Python (Disnake, Aiosqlite), FFmpeg, Youtube-DLP
- Microservices for Discord communities.
- Load Balancing: distributing load across a pool of bot workers to bypass API limits.
- Deep work with FFmpeg for streaming audio (YouTube, Spotify, SoundCloud).
- Ticket system and private voice channels.
API Integration: AI and Payment Systems
Stack: Python, Aiohttp, Google Gemini API
- Scripts for LLM interaction with dialog context and multimodal content.
- Universal adapter for payment gateways.
- Webhook validation (Signature Validation) and fraud protection.
- Robust clients with Retry Policy for unstable networks.
Telegram Mini Apps (Web3D)
Stack: FastAPI, Aiogram, Vue 3, Three.js
- Hybrid applications with 3D graphics in Telegram.
- Optimization of 3D scenes for mobile devices (GLTF, PBR, HDRI).