LANGPT / REQUEST PATH01 → 04
From a question —
to an answer with sources.
The e-library’s materials become context for the model. The reader gets an answer with references.
Lan e-library perimeter · no external internet
- 01
Access and queueThe API checks permissions and limits. The request enters a priority queue.
JWT · RabbitMQ
- 02
Library searchThe RAG service finds materials and assembles context from source fragments.
Source 01Source 02…
Elasticsearch · context for the LLM
- 03
Generation on an available modelThe load balancer routes the request to an LLM backend based on its load.
LLM routing · fallback
- 04
Answer stream and referencesThe answer reaches the interface as it is generated; references lead back to the sources.
SSE · source markers
Simplified backend diagram. Not a screenshot of the LanGPT interface.
- task
- An assistant for academic work: summarization, sections with citations, content checks against verified e-library sources without access to the external internet.
- my role
- Backend and operations: public API with JWT, rate limiting and SSE, a RAG service on Elasticsearch, an LLM backend load balancer with fallback, request moderation, monitoring, Kubernetes deployment.
- result and status
- Pilot results published by Lan on 17 April 2026: 20 universities, 6,500 users, more than 37,000 queries. Public source.
Founder’s employment experience, 2024 — present. The figures show the product’s scale, not personal contribution; the role can be confirmed by the employer on request.
More about the system