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Data Engineer (Python + SQL + Sparql + Graph Data)

Company

Ampstek

Location

helsinki, uusimaa

Posted

June 12, 2026

Position Overview

Location: Helsinki, Finland (Hybrid)

Employment Contract

Job Description: Key Responsibilities

  • Design, develop, and optimize ETL/data pipelines
  • Write complex SQL queries (joins, subqueries, CTEs, window functions)
  • Perform data transformation, validation, and data quality checks
  • Work with large‑scale distributed datasets
  • Build and manage data ingestion pipelines (APIs, SFTP, Kafka)
  • Design and implement graph data models (nodes, edges, relationships)
  • Work with RDF data structures and semantic data
  • Write and optimize SPARQL queries for graph data retrieval
  • Build and maintain knowledge graphs / ontology‑based systems
  • Automate workflows using Python scripting
  • Monitor, troubleshoot, and optimize pipeline performance

Key Skills Required

  • Advanced SQL (joins, subqueries, CTEs, window functions, optimization)
  • Stron...

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