Semantic Developer

Key Responsibilities

• Semantic Data Modelling
  • Analyse domain requirements and design OWL/RDFS ontologies
  • Integrate data into RDF triple stores (e.g. Apache Jena, Virtuoso)
  • Define and validate constraints using SHACL
  • Advise and consult clients on domain modelling best practices
• Java Spring Development
  • Maintain existing applications at various levels of maturity
  • Design, develop and maintain RESTful APIs using Spring frameworks
  • Implement data access layers for RDF repositories
  • Translate business feature specifications into technical designs
  • Maintain test suites and documentation to guarantee code quality
• Collaborate with cross-functional teams (solution architects, testers, front-end developers) to deliver seamless solutions
• Produce clear technical documentation and deliver client workshops as required

Required Qualifications

• Master's degree in Computer Science, Information Systems or related field, or equivalent by experience
• Proven expertise in both:
  • Semantic data modelling (SHACL, OWL, SPARQL)
  • Java Spring development (Spring ecosystem, integration with Apache Jena)
• Excellent analytical and problem-solving skills
• Fluent English (written and spoken); French or German advantageous

Desired Skills

• Proficient with ontology editors such as Protégé, TopBraid Composer or VocBench
• Familiarity with RDF serialisations (especially JSON-LD) and common metadata vocabularies (Dublin Core, DCAT, SKOS)
• Ability to configure and tune custom open-world inference rules
• Strong RESTful API design with OpenAPI/Swagger
• Proven testing skills
• Skilled in translating business needs into technical designs
• Experience with triplestore technologies (Virtuoso, GraphDB, Fuseki)
• Proficient with Git, CI/CD pipelines and Agile methodologies
• Prior client-facing consultancy or training delivery experience
• Advantageous:
  • Experience with RML mappings and ETL pipelines
  • Familiarity with Docker, Kubernetes and cloud platforms (AWS, Azure, GCP)
  • Experience with search databases (Elasticsearch) or other data stores
  • Understanding of microservices architectures and event-driven design

We Offer

• A dynamic and supportive work environment
• Opportunities for professional growth and development, including conference attendance and certifications
• Competitive salary and benefits package, including private healthcare and pension contributions
• Flexible working hours and hybrid/remote options

Cognizone is committed to creating a diverse environment and is proud to be an equal opportunity employer.
We invite you to join our team and bring your unique talents and ideas to our dynamic company.