Backend Engineer specializing in high-performance systems
role: Backend Engineer & Systems Engineer focus: Distributed Systems | API Development | Performance Optimization languages: [C#, Python, Go, C++] location: Remote | UTC+2 status: Available for freelanceBackend developer passionate about building scalable systems that handle real traffic. I focus on clean architecture, performance optimization, and delivering solutions that work in production.
Core Skills: API Design • Async Programming • Database Optimization • Microservices • System Architecture
Production-ready social platform serving 500+ users with 1000+ req/sec
Python FastAPI MongoDB Redis Docker
- RESTful API with JWT/OAuth2 authentication
- Async architecture with optimistic concurrency control
- Real-time features with WebSocket support
- 99.9% uptime with automated testing
AcquireMock — Payment Gateway
Mock payment system for testing payment integrations
Python FastAPI PostgreSQL Docker
- Complete payment flow simulation with OTP verification
- HMAC-signed webhooks with automatic retry logic
- Multi-language UI with dark mode support
- Card storage and transaction history
YaraDB — In-Memory Database
Custom database engine with optimistic concurrency control
Python Docker
- Implements OCC for concurrent transactions
- SHA-256 integrity verification
- Strategy pattern for extensible operations
- 99.99% data integrity in tests
SRC App — System Monitor
Real-time system monitoring with sub-100ms refresh rates
C# .NET WPF
- Multi-threaded CPU/RAM/GPU monitoring
- WMI integration for hardware metrics
- MVVM architecture with clean separation
- Live charts and performance graphs
Languages: Python • C# • Go • C++ • TypeScript
Backend: FastAPI • Django (DRF) • .NET • Flask • AsyncIO
AI & LLM: OpenAI API • Anthropic (Claude) • Prompt Engineering • RAG
Databases: PostgreSQL (NeonDB, Supabase) • MongoDB • Redis • SQLite • MS SQL • Vector DBs
ORM & ODM: SQLAlchemy • Django ORM • Entity Framework Core • SQLModel • Motor
DevOps & Cloud: Docker • CI/CD (GitHub Actions) • Render • Railway • Azure • Heroku
Tools: Git • Linux • Postman • Celery/RabbitMQ • Telegram API
Testing: Pytest • Unittest
Frontend: React • Tailwind CSS • Jinja2
Backend Development — Building scalable APIs and microservices that handle real-world traffic
System Design — Architecting distributed systems with focus on performance and reliability
Database Optimization — Query optimization, indexing strategies, and data modeling
DevOps Integration — Docker containerization, CI/CD pipelines, and deployment automation
Open for:
- Freelance backend development projects
- System architecture consulting
- Performance optimization work
- Interesting technical challenges
Best way to reach me: tymofiischur@gmail.com
Building systems that scale, code that lasts, solutions that work.