Senior Backend Engineer (Architecture & AI Systems) | Vienna / Remote (Europe only!) | Full-time | Salary + equity Early-stage startup building an AI platform that helps architecture and engineering teams reuse knowledge from past projects (documents, drawings, revisions) to reduce costly rework in planning and pre-construction. You’ll work on multi-tenant backend systems powering hybrid search, document ingestion pipelines, and large-scale indexing across complex engineering datasets. Stack / a