Senior RAG Engineer - Remote EU, AI Retrieval

Newcode.ai; Warszawa; On-site; PLN 388,000 - 517,000; Full time

Job summary

Newcode.ai is hiring a Senior Backend Engineer to own end-to-end retrieval pipelines, from document parsing to embedding and indexing. You will design hybrid semantic/keyword search, implement multi-step agentic retrieval, and build robust evaluation and tracing for production-grade AI services.

The role emphasizes secure, scalable Python/FastAPI services, with background processing for ingestion and reindexing. Remote work across the EU is supported.

Qualifications

• 5+ years building backend systems that run in production.
• Experience with retrieval or RAG systems used by real users.
• In-depth knowledge of vector databases in production.
• Strong Python, with FastAPI; PostgreSQL and Redis under load.
• Experience with OCR-heavy document ingestion and large-scale ingestion pipelines.

Responsibilities

• Own the retrieval pipeline end to end: document parsing, chunking, embeddings, indexing and keeping current.
• Design search that blends semantic and keyword retrieval, with metadata filtering and reranking.
• Build agentic retrieval with query decomposition and multi-step loops.
• Develop evaluation layers: golden sets, metrics, regression tests and traceability.
• Ship dependable Python/FastAPI services; backend jobs for ingestion/embedding/reindexing.
• Ensure data security and tenant isolation across clients.
• Maintain cross-language retrieval quality and adapt to multilingual data.

Skills

Python

FastAPI

PostgreSQL

Redis

Vector databases

Retrieval systems

Performance tuning

Tools

Qdrant

PostgreSQL

Job description

Newcode.ai is hiring a Senior Backend Engineer to own end-to-end retrieval pipelines, from document parsing to embedding and indexing. You will design hybrid semantic/keyword search, implement multi-step agentic retrieval, and build robust evaluation and tracing for production-grade AI services.

The role emphasizes secure, scalable Python/FastAPI services, with background processing for ingestion and reindexing. Remote work across the EU is supported.