Data Engineer - Knowledge Graphs & Semantic Technologies

RCH Solutions; Wayne (PA); Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Competitive salary & bonus package

Health and wellness benefits

Job summary

RCH Solutions is seeking a Data Engineer specialized in knowledge graphs and semantic technologies to join our Data and AI Engineering team. This role takes ownership of the semantic layer end to end, shaping the approach with clients and colleagues, not just implementing a specification handed to them.

You will build knowledge graphs in Stardog that connect fragmented life science data across research, clinical, regulatory and operational domains into models that people and machines can reason

Qualifications

• Hands-on production knowledge graph delivery with Stardog; transferable RDF triplestores accepted if deep Stardog work is shown.
• Strong command of semantic web standards: RDF, RDFS, OWL, SKOS, SHACL and SPARQL.
• Ontology and taxonomy modelling; translate messy source data into production-ready models.
• Mapping and virtualization of relational/semi-structured sources into graphs.
• Solid Python and SQL for data prep, transformation, automation and troubleshooting.
• Git-based workflows and CI/CD experience.
• Experience with life science or healthcare data and related regulatory expectations.
• Autonomy: own scope, propose approach and lead the team.
• Data quality, validation frameworks, and test-driven data development.
• Agile environments (Scrum or Kanban).

Responsibilities

• Design, build and evolve knowledge graphs in Stardog, from conceptual model through to production deployment.
• Model domain ontologies, taxonomies and vocabularies using RDF, RDFS, OWL and SKOS, and enforce them with SHACL constraints.
• Write, optimise and troubleshoot SPARQL queries, rules and inference over large graphs.
• Integrate heterogeneous sources into the graph using virtual graphs and mappings (R2RML and similar).
• Run discovery sessions with subject matter experts, turning business questions into a defensible semantic model.
• Align internal models with life science standards and public ontologies; manage identifier mapping across sources.
• Automate graph builds, tests and deployments through CI/CD pipelines and Python tooling.
• Embed data quality, validation and reconciliation checks into the graph lifecycle.
• Document models and enable governance, lineage, and reusable semantic assets.
• Work in agile teams, contributing to standups and retrospectives.

Skills

Stardog KG

RDF/OWL/SKOS

Ontology modelling

Virtual graphs

Python & SQL

Git & CI/CD

Life science data

Autonomy

Data quality

Tools

GraphDB

Amazon Neptune

Virtuoso

R2RML

Docker

Kubernetes

GitHub Actions

Azure DevOps

Job description

Core Values

At RCH, our Core Values are more than just words—they represent the threads that weave together the fabric of our culture. Used as a guide when interviewing new team members; as a barometer when evaluating our performance as individuals and teams, and even when deciding which customers to work with, RCH’s Values embody the behaviors upon which we measure our success and create a framework for our growth as people and professionals.

Our Core Values:

• Embrace Excellence: We strive for best-in-class delivery of innovation and service.
• Be Accountable: Integrity, ownership and accountability are non-negotiables.
• Adventure Together: We are committed to fostering a culture that embraces continuous improvement.
• Succeed as a Team: We believe harnessing the power of a team drives outcomes not achievable by individuals.
• Boundaries and Balance: Work-life balance is a core facet of our culture.

If you share in our core values, then we encourage you to continue reading this posting as you may have found a great home for your career.

About the profile

RCH Solutions is looking for a Data Engineer specialised in knowledge graphs and semantic technologies to join our growing Data and AI Engineering team of professionals who thrive at the intersection of data, technology, and healthcare. This is a hands‑on role for someone who can take ownership of a semantic layer end to end — shaping the approach with clients and colleagues, not just implementing a specification handed to them. At RCH, you’ll build knowledge graphs in Stardog that connect fragmented life science data — across research, clinical, regulatory and operational domains — into models that people and machines can actually reason over. You’ll work alongside our data platform and AI engineers, contributing the semantic backbone to modern data mesh and data fabric architectures.

Responsibilities

• Design, build and evolve knowledge graphs in Stardog, from conceptual model through to production deployment.
• Model domain ontologies, taxonomies and vocabularies using RDF, RDFS, OWL and SKOS, and enforce them with SHACL constraints.
• Write, optimise and troubleshoot SPARQL queries, rules and inference over large graphs.
• Integrate heterogeneous sources into the graph using virtual graphs and mappings (R2RML and similar) from relational databases, APIs, files and semi‑structured data.
• Rundiscovery sessions with subject matter experts, turning business questions into competency questions and a defensible semantic model.
• Align internal models with life science standards and public ontologies, and manage identifier mapping and entity resolution across sources.
• Automate graph builds, tests and deployments through CI/CD pipelines and Python tooling.
• Embed data quality, validation and reconciliation checks into the graph lifecycle.
• Document models and enable others — governance, lineage, and reusable semantic assets that outlive the project.
• Work in agile teams, contributing to standups, retrospectives, and continuous improvement.

Essential Qualifications

• Hands‑on experience delivering production knowledge graph solutions with Stardog. Experience with other RDF triplestores (GraphDB, Amazon Neptune, Virtuoso, Anzo) counts as transferable if you’re ready to go deep on Stardog.
• Strong command ofsemantic web standards: RDF, RDFS, OWL, SKOS, SHACL and SPARQL.
• Practical ontology and taxonomy modelling - able to move from stakeholder conversations and messy source data to a model that holds up in production.
• Experience mapping and virtualising relational and semi‑structured sources into a graph.
• Solid Python and SQL for data preparation, transformation, automation and troubleshooting.
• Comfortable with Git-based workflows and CI/CD (GitHub Actions or Azure DevOps).
• Experience working with life science or healthcare data, and comfortable with the quality and regulatory expectations that come with it.
• Autonomy and ownership: you scope your own work, propose an approach, defend it, and bring the team along — rather than waiting for a fully specified ticket.
• Working knowledge of data quality, validation frameworks, and test‑driven data development.
• Team-first mindset and experience in agile environments(Scrum or Kanban).

Preferred Qualifications

• Familiarity with public life science ontologies and terminologies (e.g. SNOMED CT, MeSH, ChEBI, UMLS, LOINC).
• Exposure to at least one life science domain: clinical and clinical trial data (CDISC, SDTM), R&D and drug discovery, regulatory (RIM, IDMP), or manufacturing, supply chain and quality.
• Understanding of GxP or other healthcare data regulations.
• Familiarity with FAIR data principles.
• Experience combining graphs with AI — GraphRAG, vector search, or LLM‑assisted ontology work.
• Exposure to property graphs (e.g. Neo4j) and how they compare with RDF.
• Knowledge of data lineage, catalog and governance tooling.
• Infrastructure automation using Terraform, Bash, or PowerShell, and containers (Docker, Kubernetes).

Additional information

Great talent should benefit from a great work environment. If you join our team, you’ll have access to:

• A competitive salary and bonus package based on experience.
• Comprehensive health and wellness benefits, including Medical, Dental, and Vision Insurance.
• Company‑provided Life and Long‑Term Disability Insurance.
• Company-sponsored 401(k) Plan.
• Team‑focused culture and unlimited opportunity for advancement.

**This is a remote role and the candidate must be available to work on an East Coast (US) time schedule.

**Role is only open to applicants not needing sponsorship now or in the future, no third parties please.