Oleg Fominsky

Fullstack developer with a strong backend focus, specializing in C# (.NET) and Python. I build scalable, production-ready systems with clean architecture and thorough testing. Core expertise: Backend development with C#/.NET and Python/FastAPI. AI integration: RAG pipelines, LLM-powered chatbots, document processing with embeddings. OCR and speech recognition systems. Distributed architecture: microservices, message queues (RabbitMQ), event-driven design. Telegram bots and API integrations. Database design and optimization (PostgreSQL, Redis, MongoDB). Tech stack: C#, .NET, Python, FastAPI, Docker, PostgreSQL, Redis, RabbitMQ, LangChain, OpenAI API, Anthropic API, Selenium, Git. I deliver clean, well-tested code with comprehensive documentation. Fast communication, transparent timelines, and a focus on solving real business problems.