Open to opportunities

Rares Popa

@rarespopa

Message

AI & Backend Engineer at Principal33 building MCP-based identity diagnostics and distributed systems.

Romania

Message

At Principal33, I architected and deployed a production-grade identity diagnostics AI agent through an MCP Server, combining LLMs with deterministic C# code. I also delivered a multi-tenant provisioning microservice and built Redis Pub/Sub cache invalidation that cut login latency by 40% and database query spans by 60%.

At Webby-Soft, I designed data pipelines and offline QLoRA fine-tuning workflows, and architected a secure AI backend for clinician-facing applications. I also built and deployed a local food ordering platform, and my projects include autonomous multi-agent fiscal workflows at Orkis.ro and an AI productivity platform that received the MHP Porsche Big Brains Award.

Experience

Work history, roles, and key accomplishments

Current

AI Engineer

Current

Webby-Soft

Oct 2025 - Present (1 year 1 month)

Designed end-to-end data pipelines and offline QLoRA fine-tuning workflows for domain-specific LLMs, including data validation, PII sanitization, and model evaluation. Architected a secure production-grade AI backend integrating LLM inference, structured JSON streaming, and multi-agent workflows.

LLM Engineering MLOps QLoRA 4 Bit Quantization Data Pipelines PII Scrubbing Model Evaluation AI Backend Engineer RBAC Human In The Loop

Current

AI & Backend Engineer

Current

Principal33

Mar 2025 - Present (1 year 8 months)

Architected and deployed a production-grade AI Agent via MCP Server for identity diagnostics, combining LLMs with deterministic C# code. Led design and delivery of a multi-tenant provisioning service and improved system performance through Redis Pub/Sub distributed cache invalidation.

MCP Servers Context Engineering Harness Engineering Tool Using Agent Loops C#.NET Core Redis Pub Sub Machine To Machine Authentication PostgreSQL Microservices AWS Docker Kubernetes CI CD Datadog

Fullstack Software Engineer

Webby-Soft

Jul 2024 - Mar 2025 (8 months)

Built and deployed a commercial local food ordering platform from scratch using React Native, Node.js, and MongoDB. Implemented real-time order dispatch workflows, secure customer auth, automated transactional notifications, and RESTful APIs.

React Native NodeJS MongoDB REST APIs Real Time Systems Authentication Notifications