Data Engineer

Job Title: Data Engineer (Contract)

Location: Remote in EU

Contract Type: Freelance / B2B

Start Date: ASAP

Duration: Initial contract until September 2026 with extensions

Overview

An experienced Data Engineer is required to support the transformation of an existing proof-of-concept system into a scalable, production-ready platform. The current system is built as a monolithic Python script combining data ingestion, business logic, and UI components. The objective is to refactor and rebuild this into a modern architecture consisting of a FastAPI backend and React frontend (frontend handled separately).

Key Responsibilities

• Refactor a monolithic Python application into modular components (ETL, business logic, API layer)

• Preserve and validate existing business logic, including pricing calculations and margin rules

• Integrate multiple data sources including Excel files (S3), SAP data via Snowflake, and manual cost inputs

• Implement robust data processing and transformation pipelines

• Contribute to improved data modelling aligned with internal standards where applicable

• Apply best practices in software engineering including testing, version control, and code structure

Required Skills and Experience

• Strong Python development experience, particularly with pandas and data transformation

• Solid SQL skills and experience working with Snowflake

• Proven ability to understand and refactor legacy codebases without loss of functionality

• Experience with AWS services including S3, Lambda, API Gateway, and related tooling

• Strong understanding of software engineering best practices (testing, modularisation, version control)

Nice to Have

• Experience with data modelling frameworks or structured data architecture approaches

• Exposure to complex pricing or financial calculation systems

• Familiarity with AWS CDK and broader AWS ecosystem