Sergey P.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 5, 2026.

SEI-certified solutions architect with 20+ years in .NET and AWS. I design systems that scale and deliver them AI-accelerated, architect-verified. Ex-EPAM, Namecheap, Jabil. 🧭 WHAT I DO • Solution architecture — requirements, system design, architecture reviews, estimates, technical due diligence • AWS cloud — serverless (Lambda, SQS, Step Functions), EKS, data lakes (S3, Glue, Athena), on-premise → cloud migration, multi-tenant SaaS • AI agents & LLMs — Amazon Bedrock, Claude, OpenAI; RAG, MCP servers and agentic workflows wired into real systems • Spec-driven development & AI adoption — I set up AI coding workflows (Claude Code, spec-first pipelines) so AI output is reviewed, tested and maintainable • Manufacturing & warehouse systems — MES and WMS design and implementation • Hands-on when it matters — POCs, critical components and code reviews in C# / .NET, Angular, React 🏆 SELECTED EXPERIENCE • Jabil — migrating a global manufacturing execution system (MES) from on-premise to AWS with multi-tenancy • Namecheap — architected a new platform for the core business (.NET, Node.js, AWS, Kubernetes) • EPAM Systems — solutions architect: pre-sales, architecture reviews, technical leadership, POCs • Upwork — every rated job 5.0★, plus a long-term $17K sensor-data visualization project ⚙️ HOW I WORK Spec first → architecture you approve → AI-accelerated build → my review on every change → documentation and handover. Speed of AI, without "black box" code. ✅ A GOOD FIT IF YOU NEED • An architect for a new product or a major re-platforming • A second opinion: architecture, AWS cost or security review • An AI feature or agent that must work in production, not just in a demo • More hands — I lead delivery teams through my agency, ProSoft Solutions 📩 Send me your context — I'll reply with questions, a proposed approach and an estimate.