Vector Database & Embedding Engineer RAG Pipeline Development
- Opentext
- 3 - 8 years
- Chennai
- 4 months ago
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Job Description
Job Summary
We are seeking an experienced Vector Database & Embedding Engineer to design, build, and optimize vector search pipelines, embedding workflows, and chunking strategies for enterprise Retrieval-Augmented Generation (RAG) systems.
This role requires deep hands-on experience with vector DBs (pgvector, Pinecone, Chroma, Milvus, Weaviate), embedding models (OpenAI, HuggingFace, Instructor, FlagEmbedding, BGE, etc.), and robust chunking/indexing pipelines for structured/unstructured data.
You will collaborate with LLM engineers, graph engineers, backend teams, and product owners to deliver high-accuracy, high-recall retrieval systems for AI applications.
Key Responsibilities
1. Vector Database Design & Management
- Setup, configure and manage vector DBs such as:
- pgvector, FAISS, Pinecone, Weaviate, Chroma, Milvus
- Design schemas for:
- Multi-embedding storage
- Metadata storage
- Document-level and chunk-level indexing
- Implement filtering, similarity search, MMR, reranking, and index optimization.
2. Embedding Pipeline Development
- Select, fine-tune, or run embedding models such as:
- Sentence-BERT, BGE, GTE, Instructor, FlagEmbedding
- OpenAI Embeddings / Azure OpenAI
- HuggingFace Transformers
- Build:
- Batch embedding pipelines
- Real-time embedding APIs
- Multi-encoder architecture for hybrid search
- Evaluate embedding quality, dimensionality, and vector drift.
3. Chunking, Indexing & Document Processing
- Design advanced chunking strategies:
- Fixed window chunking
- Sliding window
- Semantic chunking
- Layout-aware chunking (tables, lists, multi-column)
- Extract content from:
- PDFs, HTML pages, Office files, emails, scanned docs
- Build a complete indexing pipeline:
- Preprocessing Chunking Embedding Vector DB upsert Metadata linking
4. RAG Optimization & Retrieval Tuning
- Optimize retrieval for:
- Accuracy
- Latency
- Recall / diversity
- Implement hybrid search:
- Vector + Keyword
- Vector + Graph (GraphRAG)
- Build ranking stacks using rerankers (Cross-Encoders).
5. Backend & API Development
- Build APIs for:
- Document ingestion
- Embedding generation
- Retrieval & context merging
- Serve embedding + vector workflows using Python/FastAPI or Node.js.
- Integrate vector search with LLM prompt templates.
6. Monitoring, Evaluation & Scaling
- Evaluate retrieval metrics (pr******n@*, re***l@*, MRR).
- Implement observability for indexing, failures, and accuracy degradation.
- Scale vector DBs horizontally & vertically based on dataset size.
7. Collaboration & Documentation
- Work with LLM engineers to design end-to-end RAG pipelines.
- Maintain documentation for:
- Embedding configs
- Chunking logic
- Vector schemas
- Retrieval settings
- Train internal teams on best practices.
Required Technical Skills
Vector Databases
- Strong hands-on with:
- pgvector (must-have for enterprise)
- Pinecone, Chroma, Weaviate, Milvus, or FAISS
- Deep knowledge of:
- Index types (HNSW, IVFFlat, PQ, IVF-PQ)
- Similarity metrics (cosine, dot, euclidean)
- Index tuning (ef_search, ef_construction, cluster size)
Embeddings
- Experience generating and evaluating embeddings using:
- OpenAI / Azure OpenAI
- InstructorXL, BGE, GTE, FlagEmbedding
- Sentence-BERT / HF embeddings
- Knowledge of:
- Embedding dimensionality
- Tokenization & vector normalization
- Multi-embedding pipelines
Chunking & Preprocessing
- Strong experience with document processing libraries:
- PDFPlumber, PyMuPDF, Textract, Tika
- Designing chunking strategies for:
- PDFs
- Web pages
- Product catalogs
- Emails & logs
- Metadata creation and linking strategies.
Backend / Engineering
- Python (preferred), Node.js
- FastAPI / Flask
- SQL & NoSQL
- ETL pipelines (Airflow / custom)
- Docker, Linux environments
Experience Required
- Total Experience: 26 years
- Relevant Vector Search / Embedding Experience: 13 years
- Experience in building real RAG systems (highly preferred).
Preferred Skills
- Knowledge of:
- LangChain or LlamaIndex
- Rerankers (Cross-Encoders)
- Hybrid retrieval
- Graph + Vector hybrid search
- Experience in:
- OCR processing
- Data extraction
- Enterprise search systems
- Familiarity with:
- RedisSearch
- ElasticSearch vector search
Job Classification
Industry: IT Services & ConsultingFunctional Area / Department: Engineering - Software & QARole Category: Software DevelopmentRole: Data EngineerEmployement Type: Full timeContact Details:
Company: Tenth PlanetLocation(s): Chennai
Keyskills: embedding Retrieval Augmented Generation Vector
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