Role: Knowledge Graph (Full stack Engineer)
Location: Barcelona, Spain
Mandatory skills: Exp. in delivering Semantic Knowledge Graph skills incl. AWS Neptune + Integrations Performance and use of MCP + Mulesoft API's + SLM & LLM fine tuning.
The Full Stack Engineer is responsible for designing, building, and maintaining scalable data pipelines, knowledge graph, APIs, MCP endpoins for agentic AI, vector databases and RAG architecture based end-end platform that enable the delivery of high-quality data products for business and analytics use cases. This role focuses on transforming raw data into reliable, well-governed, and reusable assets that support agentic AI, insights generation, and machine learning use cases.
The successful candidate works closely with product managers, data scientists, ontologists, architects, and business stakeholders to understand requirements and translate them into robust technical solutions. They develop and optimize data ingestion & transformation,



knowledge graph engineering and enabling agentic AI usage across modern cloud and enterprise data environments, while ensuring strong standards for data quality, security, metadata, and compliance.
The role also contributes to the full lifecycle of data products, from design and engineering through deployment, monitoring, and continuous improvement. A strong emphasis is placed on automation, scalability, observability, and maintainability, as well as enabling trusted and accessible data for end users. The Full Stack Engineer should combine solid software engineering practices (e.g. SOLID, DDD, Vibe Coding) with data management expertise and a delivery mindset focused on creating business value through dependable data products, delivered using an Agile framework
Typical Accountabilities
- Identify required source data: Determine the necessary data sets, tables, and attributes from source systems needed to support the delivery of data products.
- Build and maintain ingestion integrations: Develo

📌 Full Stack Engineer (Barcelona)
🏢 Virtusa
📍 Barcelona