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Brussels, Brussels-Capital, Belgium • Remote OK
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You will design and build the data and context layer for a procurement AI agent platform, including knowledge graphs, semantic layers, and retrieval pipelines. You are responsible for ensuring production-grade infrastructure, including data ingestion, matching rules, and quality feedback loops.
The role requires extensive experience in knowledge graph systems, semantic modeling, and production-level data engineering using Neo4j and Python. Candidates must be proficient in semantic web standards and have a strong background in building scalable data products and retrieval architectures.
adesso Belgium is looking for a data scientist (2) to support our customer in building an AI Agent Platform Data Foundations.
Our customer is an international, independent provider of indirect procurement services.
Preferred start date: 1x ASAP and 1x January 2027
Duration: 12 months
Rate: depending on your location
Time Zone: CET
Your role
Build the data and context layer that powers the customer's procurement AI agent platform — canonical models, knowledge graph, semantic/taxonomy layer, and the retrieval and evaluation pipelines agents depend on. This is production infrastructure from day one, not a proof of concept: versioned, tested, and built for multiple tenants.
You will work on:
Data products & canonical modeling — Design and deliver the first reference data products (Supplier Master, Spend Cube, Contract Register) end to end, from source ingestion through the canonical model.
Knowledge graph & ontology — Stand up and operate the platform and working graphs (ontology, reference data, tenant separation); own the graph-plus-vector retrieval design, deciding per source whether data is represented as entities/relationships, embeddings, or both.
Master data & semantic layer — Build matching rules, golden records, and stewardship processes for Suppliers, Contracts, and Categories; contribute to the business glossary and taxonomy-to-ontology mapping.
Extraction & evaluation — Build document-extraction pipelines (e.g., from SharePoint sources) with confidence scoring and human review for uncertain cases; build and maintain labelled evaluation datasets and accuracy benchmarks against agreed thresholds.
Connector framework — Build source connectors (starting with Fabric data products and master data golden records) so new sources can be onboarded without modifying the graph core or query service.
Quality feedback loop — Implement the mechanism routing agent overrides, failures, or low-confidence retrievals back to data owners so data products improve over time rather than decay.
Engineering practice — Work exclusively in the GitHub/Azure environment; ship via pull request with CI (build, tests, security scan, evaluation fixtures); version all schemas, connector contracts, and extraction configs.
Required Experience
Demonstrated experience taking a knowledge graph system to production (not just prototyping) — schema design, query performance, tenant/data isolation - Using Neo4J and Python
Strong background in semantic modeling: ontologies, taxonomies, business glossaries, and their relationship to graph and canonical data models.
Hands-on experience with semantic web standards and technologies including OWL/OWL2, RDF, RDFS, SPARQL, ontology lifecycle management, taxonomy alignment, and semantic reasoning.
Experience building data products and master-data pipelines (entity matching, golden-record consolidation, stewardship workflows).
Experience designing and implementing hybrid retrieval architectures combining graph databases (e.g., Neo4j) and vector databases to support semantic search, RAG, and AI agent workloads.
Experience with retrieval architectures combining graph and vector/embedding approaches.
Experience building and maintaining labelled evaluation datasets and measuring extraction/model accuracy against a threshold.
Proficiency with modern data/ML engineering practices: version control, CI/CD, automated testing, containerized deployment
Experience with Microsoft Fabric and SharePoint-based document extraction pipelines.
Fluent in ENG
Open to travelling if needed (EU), this position is fully remote
Collaborative mindset, ideally with a proven similar work experience
Why join adesso Belgium?
Work in an international group with strong local expertise in Belgium.
Collaborate with cross-functional teams to deliver trusted, compliant, reusable data products.
Flexible freelance setup with the support of a growing adesso Belgium community.
adesso Belgium is part of the adesso Group, one of Europe’s leading IT-services providers with over 10,000 professionals and a revenue of €1.47 billion, the adesso Group combines strong local presence with global capabilities across the continent. WHAT SETS US APART? At adesso Belgium, we believe in building long-term partnerships through trust, quality, and innovation. We support businesses and public institutions in navigating digital transformation, delivering tailored software solutions and IT consultancy with a sharp focus on value and efficiency. Our work is driven by a deep understanding of the local market combined with access to the full knowledge and delivery power of the adesso Group. With experience across a wide range of industries, we bring both strategic insight and practical solutions that address the unique challenges of our clients. Our team consists of skilled consultants, developers, and IT specialists who are passionate about making technology work—effectively and sustainably. Whether delivering projects on-site, through nearshore collaboration, or via hybrid models, we combine proximity with scalability to offer the best of both worlds. INDUSTRIES Banking, Insurance, Public Sector, Life Sciences, Retail, Manufacturing, Energy, Automotive, Health, Media, Transport, and more.
Offices: Rue Picard 7, Brussels, Brussels Region 1000, BE
adesso Belgium is part of the adesso Group, one of Europe’s leading IT-services providers with over 10,000 professionals and a revenue of €1.47 billion, the adesso Group combines strong local presence with global capabilities across the continent. WHAT SETS US APART? At adesso Belgium, we believe in building long-term partnerships through trust, quality, and innovation. We support businesses and public institutions in navigating digital transformation, delivering tailored software solutions and IT consultancy with a sharp focus on value and efficiency. Our work is driven by a deep understanding of the local market combined with access to the full knowledge and delivery power of the adesso Group. With experience across a wide range of industries, we bring both strategic insight and practical solutions that address the unique challenges of our clients. Our team consists of skilled consultants, developers, and IT specialists who are passionate about making technology work—effectively and sustainably. Whether delivering projects on-site, through nearshore collaboration, or via hybrid models, we combine proximity with scalability to offer the best of both worlds. INDUSTRIES Banking, Insurance, Public Sector, Life Sciences, Retail, Manufacturing, Energy, Automotive, Health, Media, Transport, and more.
Offices: Rue Picard 7, Brussels, Brussels Region 1000, BE
