StaffInIT Contract Fully remote (quarterly sessions in Prague; Prague-based preferred)€20 – €35/hr

Senior Fullstack AI Engineer (PwC – AI Platform, RAG)

Project

Build an AI platform (RAG, search, document drafting) to automate and scale complex corporate consolidation assessments for PwC.

Duration: 1 year (Start: ASAP) | HackerRank: Yes
Location: Fully remote (occasional quarterly team sessions in Prague; Prague-based candidates preferred)
Hours: Core US overlap required (minimum 2–6 PM CET, preferred 2–7 PM CET)
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. Python Backend & Platform Engineering

Core: Python 3.12+, OOP, clean architecture, FastAPI, CLI scripting (argparse, Bash)
Async & Data: Celery, event-driven workflows (RabbitMQ, Azure Service Bus), PostgreSQL, MongoDB
Data & Reporting: pandas, NumPy, openpyxl (JSON to Excel report generation), batch processing

2. RAG & LLM Engineering

Pipeline: End-to-end RAG (ingestion → chunking → embeddings → retrieval → generation)
LLMs & Prompts: OpenAI API (reasoning models, structured output parsing), prompt engineering and versioning (manifest.yaml)
Search & Retrieval: Hybrid retrieval (Vector + BM25), metadata filtering, Qdrant, Azure AI Search (ACS), pgVector

3. Document Processing & Ingestion

Extraction & OCR: PyMuPDF (fitz), Tesseract (pytesseract)
Strategy: Clause-aware and section-aware chunking for legal/financial documents

4. Fullstack Integration & UI Demos

Internal Tools: Multi-page Streamlit apps, session state, streamlit-aggrid for SME workflows and PoCs
Fullstack Support: Basic-to-intermediate Node.js and React to maintain and connect frontend integration modules to Python APIs

5. DevOps & Quality Assurance

Hygiene: Docker, Docker Compose, Git (small, regular commits), YAML-driven configurations
Testing: Unit/integration tests for Python services and pipelines

Soft Skills & Nice-to-Haves

Soft Skills: Autonomous pipeline debugging, strong communication to iterate on prompts/outputs alongside non-technical accounting/audit SMEs
Nice-to-Have: RAG evaluation frameworks, MCP/FastMCP, LangChain, LangGraph, multi-agent frameworks (CrewAI, AutoGen, TaskWeave), Azure CI/CD

Your application

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Additional questions

I confirm I can commit to daily US overlap hours of at least 2–6 PM CET *Yes

Minimum required overlap is 2–6 PM CET (preferred 2–7 PM CET). Applications without this commitment are automatically disqualified.

I am willing to complete a HackerRank assessment *Yes

The recruitment process includes a HackerRank technical assessment. 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.

What is your expected hourly rate (EUR, B2B/contract)? *

Are you able to travel to Prague quarterly? *

Occasional quarterly team workshops/gatherings, likely in Prague.

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