RAG System Design & ImplementationSergiu Nicoara
I design and build production-grade RAG pipelines with hybrid retrieval, evaluation harnesses, and cloud deployment.
What you get:
Hybrid retrieval: dense vector (pgvector/Qdrant/Weaviate) + BM25 + RRF fusion
Cross-encoder reranking for precision at the top-k level
RAGAS evaluation suite (faithfulness, context precision, context recall)
FastAPI backend, Redis caching, Prometheus/Grafana observability
Deployed to GCP Cloud Run, P95 latency gated at 800ms
Not just retrieval — grounded generation with measurable quality gates.
GraphRAG add-on: +$4,000 / +3 weeks
For relational domains where answers require connecting multiple documents (org charts, legal precedents, code dependencies, knowledge bases). Adds Neo4j schema design, entity extraction pipeline, 6-stage multi-hop retrieval, and GNN re-scoring.
FAQs
Example work
Sergiu's other services
Starting at$5,000
Duration3 weeks
Tags
FastAPI
Google Cloud Platform
LangChain
PostgreSQL
Python
Redis
AI
LLM
Machine Learning
Service provided by
Sergiu Nicoara Timișoara, Romania
RAG System Design & ImplementationSergiu Nicoara
Starting at$5,000
Duration3 weeks
Tags
FastAPI
Google Cloud Platform
LangChain
PostgreSQL
Python
Redis
AI
LLM
Machine Learning
I design and build production-grade RAG pipelines with hybrid retrieval, evaluation harnesses, and cloud deployment.
What you get:
Hybrid retrieval: dense vector (pgvector/Qdrant/Weaviate) + BM25 + RRF fusion
Cross-encoder reranking for precision at the top-k level
RAGAS evaluation suite (faithfulness, context precision, context recall)
FastAPI backend, Redis caching, Prometheus/Grafana observability
Deployed to GCP Cloud Run, P95 latency gated at 800ms
Not just retrieval — grounded generation with measurable quality gates.
GraphRAG add-on: +$4,000 / +3 weeks
For relational domains where answers require connecting multiple documents (org charts, legal precedents, code dependencies, knowledge bases). Adds Neo4j schema design, entity extraction pipeline, 6-stage multi-hop retrieval, and GNN re-scoring.
FAQs
Example work
Sergiu's other services
$5,000