RAG Architect

Zoho; India; Remote; INR 2,500,000 - 4,000,000; Full time

Job summary

Zoho is seeking an experienced Context Window Optimization / RAG Architect to own enterprise retrieval performance, accuracy, and cost metrics. The role involves designing high-throughput knowledge retrieval systems, optimizing semantic parsing, building re-ranking pipelines, and engineering caching grids for data-grounded AI responses with minimal latency and token efficiency.

The candidate will architect end-to-end RAG pipelines, optimize window utilization, deploy high-performance re-ranking

Qualifications

• 6 to 10 years of enterprise data engineering, database design, or search engine engineering experience.
• 3+ dedicated years actively scaling context retrieval loops for live LLM applications.
• Strong mastery of Python, vector databases (Pinecone, Milvus, Weaviate), text embeddings, open-source orchestration tools (LlamaIndex, LangChain), and SQL.

Responsibilities

• Architect end-to-end Retrieval-Augmented Generation (RAG) pipelines for enterprise use.
• Design efficient context window usage and smart chunking strategies.
• Build high-performance re-ranking layers using cross-encoders (Cohere Rerank, BGE-Reranker).
• Implement automated semantic caching (e.g., GPTCache) to reduce tokens and latency.
• Create automated data chunking pipelines for PDFs, wikis, and SQL outputs.
• Govern vector similarity spaces with hybrid search (dense + BM25).
• Audit context-level hallucinations and track accuracy logs.

Skills

Python

Vector databases

Pinecone

Milvus

Weaviate

LlamaIndex

LangChain

SQL

Knowledge graphs

Education

Cloud certification (AWS/GCP/Azure)

Tools

Neo4j

GPTCache

Cohere Rerank

BGE-Reranker

Pinecone

Milvus

Weaviate

LlamaIndex

LangChain

BM25

Job description

• Total Experience Required: 6 to 10 years
  
• Relevant Experience Required: 3+ years of dedicated experience designing production-grade Retrieval-Augmented Generation (RAG) architectures and optimizing LLM token throughput
  

Job Summary

We are seeking an experienced Context Window Optimization / RAG Architect to take full ownership of our enterprise generative AI retrieval performance, accuracy, and operational cost metrics. The ideal candidate will design high-throughput knowledge retrieval systems, optimize semantic context parsing, build custom re-ranking pipelines, and engineer caching grids to deliver data-grounded AI responses with minimal latency and maximum token efficiency.

Key Responsibilities

• Architect end-to-end advanced Retrieval-Augmented Generation (RAG) pipelines, building structures for document parsing, semantic metadata enrichment, and multi-vector lookups.
• Optimize context window utilization patterns, designing smart parent-child chunking models, sentence-window retrievals, and sliding window strategies to eliminate irrelevant text tokens.
• Build high-performance re-ranking layers, deploying machine learning cross-encoders (e.g., Cohere Rerank, BGE-Reranker) to score retrieved documents before feeding them into the LLM context pool.
• Implement automated semantic caching architectures, utilizing caching layers (e.g., GPTCache) to capture recurring semantic queries, reducing API token expenditures and response latencies.
• Establish automated data chunking pipelines, configuring ingestion routines to cleanly parse semi-structured and unstructured formats (PDFs, corporate wikis, SQL outputs) into clean vector targets.
• Govern vector similarity spaces, fine-tuning hybrid search algorithms that cleanly combine dense semantic embeddings with sparse keyword token indexes (BM25).
• Audit context-level hallucination rates and accuracy logs, tracking precision metrics, retrieval recall bounds, and processing speeds to systematically eliminate incorrect model generations.

Requirements

• 6 to 10 years of enterprise data engineering, database design, or search engine engineering experience, with 3+ dedicated years actively scaling context retrieval loops for live LLM applications.
• Strong technical mastery of Python, vector databases (Pinecone, Milvus , Weaviate ), text embedding models, open-source orchestration tools ( LlamaIndex , LangChain ), and SQL.
• Deep structural understanding of context window limitations ("lost in the middle" phenomenon), multi-modal token dynamics, network data transfer speeds, and cloud memory spaces.
• Mandatory certification: Professional Cloud Data/Database Engineer or Specialty Analytics credential from a major cloud vendor (AWS/GCP/Azure).

Preferred Qualifications

• Prior experience implementing Graph RAG frameworks utilizing native knowledge graphs (e.g., Neo4j) to map complex corporate data relationship networks.
• Familiarity with fine-tuning open-source text embedding models specifically optimized for industry-specific terminology or legacy product schemas.