ENGINEERING FOUNDATION

Tech Stack Board

Production-tested technologies across frontend, backend, data, and AI orchestration.

Frontend

Production

React 19TanStack Start / Router / QueryViteTailwind CSSshadcn/ui

Used in:PlatformUC-1 ↗UC-3 ↗

Backend

Production

tRPCNode.jsFastAPI (Python)Drizzle ORM

Used in:PlatformUC-1 ↗

Data

Production

PostgreSQLpgvectorRedisS3-compatible Object Storage

Used in:UC-2 ↗Platform

LLM & Serving

Production

LLM Gateway (LiteLLM)Self-hosted LLM (Qwen family)vLLMVision LLM

Used in:UC-1 ↗UC-2 ↗UC-3 ↗

Retrieval

Production

Embeddings (bge-m3)Vector Search (HNSW)RerankingGrounded answers with citations

Used in:UC-2 ↗

Document AI

Production

DoclingTesseract OCRPyMuPDFLayout-aware ChunkingOnline Document Editor

Used in:UC-1 ↗UC-2 ↗UC-3 ↗

Orchestration

Production

n8nJob Queue (Redis RQ)Webhooks

Used in:UC-1 ↗UC-2 ↗UC-3 ↗

Evaluation

Production

Custom Multi-run Eval SetsLLM-as-a-JudgeHit@KRefusal RateLatency Benchmarks

Used in:UC-2 ↗

Chat UI

Production

Open WebUI (fork + SSO integration)

Used in:UC-2 ↗

Infra

Production

DockerKubernetesGitOpsCI/CD

Used in:Platform

Security & Access

Production

SSO (OIDC)Role-based Access per ModuleAudit Log

Used in:Platform

AI-Assisted Dev

Daily

Claude CodeMCPMulti-agent Workflow

Used in:Daily Workflow