GRZEGORZ JACEK ZBIEC

Led a cross-functional backend team (Python, AI chatbot, Data Engineering, Node.js) delivering production-grade microservices and real-time APIs that scaled to thousands of active users with 99.99% service uptime. Architected and delivered AI integrations using Vertex AI + OpenAI APIs, including secure API key management, message routing, and feedback-loop accuracy monitoring, which improved automated support resolution by 40%. Built high-availability data ingestion pipelines using Airflow + Spark + Pub/Sub + Postgres/BigQuery, reducing data freshness lag by 65% and improving visibility into platform operations. Productionized RAG chat systems with Pinecone vector search and knowledge embeddings — boosting assistant adoption and self-serve success by 35%. Established DevOps automation with Docker, Kubernetes, GitHub Actions CI/CD, IaC, and progressive delivery — 3× faster deployment cycles with zero-downtime rollouts. Mentored engineers in modern backend and AI practices, improvin

Developed a national rental exchange platform for the UAE using Python + React + GIS, delivering real-time property availability, rental history, and pricing evaluation. Built geospatial features with PostGIS and spatial indexing for near-instant map rendering; engineered geo-ETL pipelines to ingest and reconcile data from government portals, third-party providers, and IoT sensors; integrated AI and LLM services for market analytics, automated pricing estimation, and property classification; launched an intelligent rental chatbot; implemented vector search with Pinecone for similarity matching; improved security with OAuth2 authentication; set up CI/CD pipelines with GitHub Actions; migrated workloads to AWS/GCP with autoscaling.