• Built the entire production backend from zero on GCP with full Terraform IaC: multi-region routing, auth, billing, observability, and data pipelines.
• Shipped context-aware AI autocomplete at p95 ~500ms for thousands of users worldwide (browser extension).
• Real-time context ingestion (Python/FastAPI/Redis), RAG post-processing with Spacy + USearch, CRDT/Yjs chat sync, Stripe billing, realtime JWT revocation via PubSub.