# StreamSearch

> Enterprise search engineering practice. We design and build high performance enterprise search engines on Elasticsearch and Apache Lucene, real-time document indexing pipelines, web crawlers, and retrieval / RAG systems for AI products.

StreamSearch is led by Saeed Shahsavan (M.Sc. Software Engineering; thesis: "Design of an Enterprise Search Engine Based on Cloud Computing"), working remotely with enterprise teams on search platforms, event-driven data infrastructure and retrieval for AI products. Core stack: Elasticsearch, Apache Lucene, Kafka, Pulsar, Go, Java.

## Company

- [About](https://streamsearch.org/about/): Who StreamSearch is and how engagements are run.
- [Team](https://streamsearch.org/team/): Saeed Shahsavan, technical lead Saeed Aliakbari (Java, payment/FinTech systems, LLM engineering), and the specialist network engagements are staffed from.
- [Contact](https://streamsearch.org/contact/): info@streamsearch.org
- [SEIR demo](https://seir.streamsearch.org/): SEIR (Sovereign Enterprise Information Retrieval) is the live demo of Sovereign Search: one search across the records of several organizations, while each organization keeps control of its own data and decides who may see what. It runs on synthetic records, with spelling-tolerant search across scripts.

## Services

https://streamsearch.org/services/ covers ten capabilities:
- Sovereign Search (SEIR) (Data sovereignty, Federated search, Access control)
- Enterprise search engine builds (Apache Lucene, Elasticsearch, Solr)
- Real-time indexing pipelines (Kafka, Pulsar, Flink)
- Vector, semantic and RAG search (Elasticsearch, Embeddings, HNSW, Hybrid)
- Relevance tuning & evaluation (Judgements, nDCG, A/B)
- Search analytics & observability (OpenTelemetry, Query logs)
- LLM & AI product engineering (RAG, Agents, Evals)
- Architecture review & consulting (Review, Roadmap)
- Training & team enablement (Elasticsearch, Workshops, Pairing)
- Migration off legacy search (Elasticsearch, OpenSearch, Migration, Parity)

## Articles

- [Articles index](https://streamsearch.org/articles/): Long-form engineering notes on indexing, ranking, crawling and retrieval.
- [Sovereign Search: Enterprise Search with Data Sovereignty](https://streamsearch.org/articles/sovereign-search/): Introducing Sovereign Search by StreamSearch: find information across enterprise systems while respecting data sovereignty and access controls. Available for focused enterprise pilots.
- [Search Engine Crawlers: A Deep Dive Into Architecture and Engineering Challenges](https://streamsearch.org/articles/search-engine-zarebin/): Inside the architecture of web crawlers — frontiers, fetchers, politeness and dedup — with lessons from building one at national scale for Zarebin.ir.

## Optional

- [llms-full.txt](https://streamsearch.org/llms-full.txt): Expanded version of this file with full page and article content inlined.
- [RSS feed](https://streamsearch.org/feed.xml)
- [Sitemap](https://streamsearch.org/sitemap-index.xml)