Ontology Engineer

Czym będziesz się zajmować?

Andersen is hiring an Ontology Engineer.

The company is a global technology provider specializing in data analytics and AI solutions that help organizations understand customer behavior, optimize marketing, and make data-driven decisions.

The project builds a large-scale Knowledge Graph and Identity platform connecting audiences, content, brands, devices, and behavioral data to support identity resolution, audience insights, measurement, and advanced analytics.

Responsibilities

• Develop and extend RDF/RDFS/OWL ontology schemas, including entity classes, properties, and constraints.
• Build and maintain SHACL validation shapes and support data quality checks.
• Manage ontology versioning, changelogs, and schema consistency.
• Write efficient SPARQL queries and graph traversals.
• Develop PySpark/Databricks pipelines transforming high-volume TV and web activity data into graph attributes.
• Implement derivation logic and validate outputs before graph loading.
• Write clean, tested, reusable Python code.
• Apply embeddings, semantic similarity, and vector search to entity matching and ontology alignment.
• Collaborate with data engineering, data science, product, and operations teams on graph schema and pipeline development.
• Contribute to ontology design reviews, documentation, and team tooling.

Kogo poszukujemy?

Must-haves

• Experience with RDF/RDFS/OWL ontology development and graph databases.
• Hands-on SHACL validation, data quality checks, ontology versioning, and schema consistency.
• Strong SPARQL skills and experience with graph traversals.
• Experience building PySpark/Databricks pipelines for high-volume data processing and transformation.
• Strong Python skills: clean, tested, documented, and reusable code.
• Experience with event-to-ontology transformation and graph attribute derivation.
• Familiarity with embeddings, semantic similarity, or vector search for entity matching and ontology alignment.
• Ability to collaborate with data engineering, data science, product, and operations teams.
• Interest in W3C semantic web standards, RDF-native graph databases, and entity resolution.

Nice-to-haves

• Experience with Amazon Neptune, Stardog, or similar RDF triplestores.
• Knowledge of data virtualization, LLM APIs, or RAG for information extraction and entity disambiguation.
• Background in media, entertainment, or ad tech.
• Experience with identity resolution, probabilistic record linkage, or device graphs.

Czego wymagamy?

2 lata doświadczenia na podobnym stanowisku

Znajomości

• Ontologies
• Python
• SPARQL

Mile widziane

• SHACL

Języki

• Angielski
• Polski (mile widziane)

Jakie warunki i benefity otrzymasz?

• 13k-21.4k PLN brutto/m (Umowa o pracę)
• Umowa o pracę - Elastyczne godziny pracy (100%)
• Praca zdalna: Dowolnie
• Pakiet medyczny
• Kawa / Herbata

Kim jesteśmy? Andersen - your global software development partner Andersen is a global software development company with over 18 years of experience supporting businesses worldwide in their digital transformation.

Headquartered in Poland, we operate development centers across Germany, the USA, the UK, Lithuania, Hungary, Kazakhstan, Georgia, Azerbaijan, Cyprus, and the UAE, enabling us to deliver high-impact solutions close to our customers. We offer end-to-end IT services - from custom software development, API integration, and system architecture to legacy modernization and long-term support. With deep technical expertise and a focus on business value, we build tailored, scalable, and secure digital products. Harnessing the power of AI, Machine Learning, Data Science, Big Data, and Visual Technologies, we create intelligent, future-ready solutions that support digital transformation and solve real-world business problems.

Recognized among the world’s Top 1,000 B2B service providers, Andersen has earned the trust of industry leaders. Our portfolio includes long-term partnerships with Siemens, S&P Global, Ryanair, IHS Markit, TUI, Johnson & Johnson, T-Systems, and many more. With a team of 3,700+ highly qualified experts in 16+ global locations, we have successfully delivered over 1,000 projects across industries such as Healthcare, FinTech, Logistic, Automotive,

Manufacturing, E-commerce, Multimedia & Entertainment and more. Driven by responsibility, client-focus, and commitment to results, Andersen is your reliable tech partner for building high-ROI, future-proof digital solutions - anywhere in the world.