Oleg M.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 7, 2026.

Senior Enterprise SaaS Architect | AI App Development | High-Performance Systems. I design and build production-ready Enterprise SaaS platforms, AI-powered applications, and high-performance real-time systems. With 20+ years of engineering experience, I help companies: - Finish and launch MVPs - Rebuild from scratch with scalable architecture - Take over existing codebases - Stabilize & optimize complex enterprise systems - Deliver high-performance and real-time platforms - Provide full-stack ownership from architecture to deployment I specialize in systems that must be stable, scalable, and built for long-term growth. Enterprise SaaS & Multi-Tenant Architecture - C#, ASP.NET Core, .NET Core - ASP.NET Zero, ABP IO, ASP.NET Boilerplate - Multi-tenant SaaS architecture - Role-based access control - Enterprise dashboards - DevExpress, Telerik UI systems - PostgreSQL, SQL Server, Supabase - Redis for performance and caching I design scalable architecture that supports real-world business growth. High-Performance & Real-Time Systems - SignalR and real-time communication - MQTT messaging systems - WebSockets - Distributed background services - High-concurrency backend services - Performance tuning & memory optimization Ideal for: - Trading platforms - IoT systems - Financial dashboards - Live data platforms AI App Development & Intelligent Systems - OpenAI API integration - AI App Development - RAG architecture - Embeddings & semantic search - Semantic Kernel - AI agents inside enterprise workflows - Telegram bots - Twilio integrations - OpenClaw, Claude Code, Google Antigravity I integrate AI into production systems. Full-Stack Engineering - React, Angular, TypeScript - Tailwind CSS - Clean API-driven frontend architecture - Mobile-first, high-performance UI Trading, Crypto & Automation Systems - CoinGecko, CoinMarketCap APIs - Uniswap, 1inch, SushiSwap integrations - Wallet management systems - RSI / EMA strategy automation - Real-time price monitoring systems Large-Scale Scraping & Data Infrastructure - Playwright, Puppeteer, Selenium - Proxy rotation (Bright Data, Oxylabs) - Distributed scraping systems - E-commerce intelligence platforms - Data aggregation pipelines Databases & Scalability - PostgreSQL - Supabase - SQL Server - Redis - MongoDB Schema design, indexing, performance optimization, and long-term scalability. Cloud & Infrastructure - AWS (EC2, RDS, S3, Lambda, CloudFront) - Azure - CI/CD pipelines - Monitoring & diagnostics - Scalable deployments When Clients Hire Me - Finish and launch MVP fast - Rebuild from scratch with scalable architecture - Take over existing codebase and stabilize & optimize - Build enterprise SaaS systems - Add AI App Development using OpenAI API - Deliver high-performance real-time systems - Provide full-stack ownership end-to-end I focus on production-ready systems, scalable architecture, and high-performance execution. If you need a senior engineer who understands enterprise SaaS, AI integration, real-time systems, and complex architecture, let’s discuss your project.