Oleksii S.

I am an AI developer and senior .NET engineer. I help companies build practical AI-powered products, RAG systems, chatbots, AI assistants, document search, and AI workflows that work with real business data. A strong background in .NET, backend systems, SaaS platforms, Blazor, Azure, databases, and production-ready architecture helps me build AI features as stable parts of real software products. My focus is on making the solution useful, reliable, and easy to maintain. I have worked with systems in finance, grocery, and other business domains, with attention to clean architecture, good performance, stable backend, and code that other developers can support and extend later. 🤖 AI Engineering - AI-powered applications and business automation - RAG systems / Retrieval-Augmented Generation - AI assistants and knowledge-base chatbots - AI agents and multi-step AI workflows - LLM integration and orchestration - OpenAI API, Semantic Kernel - Vector databases, including Qdrant - Document processing and semantic search - Prompt engineering and context management - Integration of AI features into existing .NET applications 🌐 Backend & Architecture - .NET Core / .NET Framework - High-load systems and distributed architecture - Microsoft Orleans - REST APIs and scalable SaaS platforms - Event-driven and service-oriented architecture - Performance optimization - Legacy system modernization 🎨 Frontend - Blazor - Angular - SPA development - HTML, CSS, TypeScript 🚀 Cloud & Data - Azure Cloud - Azure App Services - Azure Storage - SQL Server, PostgreSQL, Cosmos DB - Entity Framework, Dapper - Database design for business and AI-powered applications 📱 Mobile - .NET MAUI - Mobile application development - Contribution-level experience with the .NET MAUI ecosystem 🗄️ DevOps - Azure DevOps - CI/CD pipelines - Git - Deployment automation 📈 Experience & Results - Built AI-powered features, RAG systems, and assistants connected to real business data - Integrated LLMs with databases, APIs, documents, and internal knowledge bases - Built and scaled systems in finance and grocery domains used by thousands of users - Delivered full-stack solutions including backend, web, mobile, and AI features - Designed systems capable of handling real production traffic - Led development teams and mentored other engineers - Contributed to the .NET MAUI ecosystem - Migrated legacy systems from .NET Framework to modern .NET architecture - Improved performance, stability, and maintainability of existing applications 🤝 Let's connect! If you need an AI developer who can also build reliable .NET software behind the AI features, feel free to reach out and let’s discuss your project.