StaffInIT Contract Fully remote (quarterly workshops likely in Prague)€20 – €35/hr

Senior AI/Data Engineer – GraphRAG (Neo4j) (PwC)

Project

Build production-grade, scalable data and AI-enabled systems using Python, Knowledge Graphs, and GraphRAG.

Duration: Full-time/Contract (Start: ASAP) | HackerRank: Yes (AI Engineer Challenge)
Location: Fully remote (occasional quarterly team workshops/gatherings likely in Prague)
Contract: B2B only — we only accept contractors with a valid EU VAT number verifiable in VIES (VAT Information Exchange System)

Technical Stack & Core Responsibilities

1. Graph & Database Engineering

Graph Architecture: Graph data modeling, relationship mapping, and graph traversal logic
Tech Stack: Azure Cosmos DB (Gremlin API) and Neo4j
Data Platforms (Bonus): Databricks or similar data platforms

2. GenAI & GraphRAG Engineering

Pipeline Design: GraphRAG solutions combining knowledge graphs, vector search, metadata, and LLM-based retrieval
Frameworks: LangChain and LangGraph
Agentic AI: MCP (Model Context Protocol) server/client integration and hosting, agent memory management, spec-driven AI development
Search (Bonus): Vector databases, Azure AI Search, or semantic search platforms

3. Backend & Data Pipelines

Core: Strong commercial Python backend and data engineering development
Architecture: Scalable data pipelines, API design, software engineering best practices (performance optimization, testing)

4. Fullstack & DevOps Support

Frontend: Working knowledge of React and Next.js to support full-stack development where needed
Infrastructure (Bonus): Docker, Kubernetes, CI/CD, cloud-native environments

Candidate Profile & Traits

Seniority: Hands-on engineer capable of making independent technical decisions and driving high-quality implementation
Collaborative: Partners effectively with cross-functional product, engineering, data, and AI teams

Your application

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Additional questions

I am willing to complete a HackerRank assessment *Yes

The recruitment process includes a HackerRank AI Engineer Challenge. Applications without this commitment are automatically disqualified.

What is your company's EU VAT number (registered in VIES)? *

We only accept B2B contractors whose EU VAT number is registered and verifiable in VIES (VAT Information Exchange System). Format: country code + number, e.g. PL1234567890.

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Are you able to travel to Prague quarterly? *

Occasional quarterly team workshops/gatherings, likely in Prague.

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