Case Study // System Blueprint

Semantic Search Engine.

Document search platform converting unstructured text into vector embeddings with contextually relevant retrieval. Multi-tenant indexing, hybrid keyword + semantic search, and relevance tuning.

OpenAI EmbeddingsPineconeNext.jsNode.jsPostgreSQL

Performance Benchmarks

Verified Benchmark

100K+ documents indexed

Verified Benchmark

<500ms p95 retrieval latency

Verified Benchmark

30% relevance lift over keyword-only

Problem Statement

The Challenge.

Traditional keyword search fails when users don't know the exact terms in a document. Organizations need search that understands meaning, not just keywords.

System Architecture.

01

Document ingestion with automatic text extraction and cleaning

02

OpenAI embedding generation with batch processing

03

Pinecone vector store with namespace-based multi-tenancy

04

Hybrid retrieval: BM25 keyword scoring + cosine similarity fusion

05

Relevance tuning API for per-tenant search customization

06

PostgreSQL for document metadata and access control

Engineering Challenges.

01 // Technical Bottleneck

Balanced keyword vs semantic scoring weights - built an A/B testing framework to tune relevance per tenant

02 // Technical Bottleneck

Designed namespace isolation in Pinecone for multi-tenant data separation without performance degradation

03 // Technical Bottleneck

Implemented incremental indexing to avoid full re-embedding when documents are updated

Results & Impact.

  • Sub-second retrieval across large document collections
  • Multi-tenant architecture serving isolated search indexes
  • Hybrid search outperforms pure keyword or pure semantic by 30%+
Production AI Architecture

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