Semantic Engineer

Knowledge Graph Engineer At Cognizone , we’re not just another tech company—we’re trailblazers in data modeling , knowledge graph implementation , linked open data integration , and semantic data publishing . With vibrant hubs in Brussels , Fribourg ( Switzerland) , and Athens, we’re building cutting-edge solutions that empower our clients while fostering a collaborative and innovative work environment that our team loves. Join us in Greece to be part of a dynamic crew driving the future of data technology! Position: Knowledge Graph Engineer Key Responsibilities : Implement and manage RDF , OWL , and SPARQL -based solutions to meet complex data modeling requirements. Develop and apply SHACL rules for data validation and ensure adherence to semantic web standards . Integrate SKOS -based vocabularies into applications and data ecosystems. Collaborate with cross-functional and multinational teams to deliver semantic solutions . Optimize and query knowledge graphs using triple stores like Virtuoso , GraphDB , or similar systems. Apply FAIR (Findable, Accessible, Interoperable, Reusable) data principles to ensure data interoperability. Conduct testing and validation of semantic implementations and contribute to technical documentation. Work closely with non-technical stakeholders to bridge the gap between technical and business perspectives. Elaborate data quality management strategies, perform quality tests , and address data quality issues . Required Qualifications : At least 5 years of professional IT experience , including a minimum of 3 years in semantic web technologies ( RDF , OWL , SPARQL , SHACL , SKOS ). Solid theoretical understanding of formal languages and ontologies (e.g., Description Logics , OWL ). Strong knowledge of SHACL for data validation and SKOS for controlled vocabularies. Experience with data quality management strategies and execution of data quality tests . Hands-on experience with well-governed open-source semantic web solutions ( triple stores , frameworks, etc.). Familiarity with knowledge graph implementation and semantic data publishing . Master's degree in Computer Science , Information Technology , or a related field. Excellent problem-solving skills and attention to detail. Fluency in English is required. Bonus Points!: Other developments frameworks experience such as Java, Angular, React, ... Fluency in Dutch and / or German Why Join Cognizone? Vibrant Work Culture : Thrive in a supportive and dynamic environment where your ideas matter. Grow with Us : Unlock endless opportunities for professional development and career advancement. Competitive Rewards : Enjoy a competitive salary , comprehensive benefits package , and perks tailored to your needs. Ready to Make an Impact? Join Cognizone and bring your expertise to a team that’s shaping the future of data innovation. Visit our website at www.cogni.zone to learn more about our mission and culture. Apply now and let’s build something extraordinary together! Locations Greece , Belgium Remote status Hybrid About Cognizone Cognizone is a leading innovator in data modeling, knowledge graphs implementation, linked open data integration, and semantic data publishing. With a presence in Brussels, Switzerland, and Greece, we are dedicated to delivering cutting-edge solutions to our clients while maintaining a happy and productive work environment for our team. Founded in 2015 Co-workers 30 Turnover 3M