IURIE S.

I build and lead the engineering behind AI-powered products and high-load backend systems - from architecture on a whiteboard to production on AWS. For 20+ years I've been shipping software that has to work: real-time control systems for an industrial plant, e-commerce platforms across Europe, and a payment gateway processing ~100,000 transactions per day. Today I run my own software company and take senior engineering and architecture work directly for clients. What I do: - AI & LLM integration - RAG pipelines, AI agents, OpenAI/Anthropic API integrations, workflow automation - Backend & APIs - Python, Node.js, C#/.NET, PostgreSQL, REST/gRPC - Architecture & scaling - microservices, event-driven design (Kafka), caching (Redis), fault tolerance, idempotency, observability - Cloud & DevOps - AWS, Docker, Kubernetes, CI/CD - Real-time & embedded - C/C++, QNX Neutrino RTOS, Linux (a rare edge for performance-critical systems) - Technical leadership - code review, automated testing, release processes, distributed teams Selected results: - Payment gateway: microservices handling ~100,000 transactions per day - 8 years of e-commerce platforms: 10,000+ daily users at 97% uptime - QNX to Linux migration of mission-critical real-time software with zero production downtime - 20,000+ hours delivered on Upwork with 100% Job Success How I work: I start from your business constraints, propose the simplest architecture that solves the problem, and communicate clearly in writing. You get production-ready code with tests and CI/CD - not a prototype you have to rewrite. Best fit: founders and product teams who need a senior engineer or fractional CTO for AI-enabled products, payment/fintech systems, or backend platforms that must scale. Send me a short description of your project and I'll reply with an honest assessment of scope, risks and timeline.