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Data Specialist - Knowledge Graphs en Barcelona

Cala AI

Categoría
Ingeniero de Datos
Industria
Industria AI
Lugar de trabajo
En sede
Horas
Full-Time
Prácticas
false
Habilidades
OWL SHACL RDF Neo4j Knowledge Graph
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Descripción de la oferta

About Cala AI

From the creators of Vilynx - a Barcelona AI startup acquired by Apple - comes Cala AI: a bold new venture redefining how information is verified and represented at massive scale. Based in Barcelona’s vibrant tech hub near Passeig de Gràcia, Cala AI is building innovative AI systems focused on trust, accuracy, and impactful technology that challenges industry norms.Recently, Cala AI was named by Creandum to their #EuroSeed50 list - highlighting the most promising early-stage startups in Europe - an honor that reflects the strong belief in our mission and team. We are a small, ambitious group dedicated to building real solutions with grit, heart, and a culture of authenticity.

About the role

We’re looking for a Data Specialist focused on Knowledge Graphs to join our growing team. You’ll work at the intersection of big data, semantics, and AI, helping architect and scale our graph-based data infrastructure.Your role will focus on designing and maintaining data systems that power our knowledge graph platform - including RDF graphs, ontologies, and semantic validation/querying pipelines. You'll contribute to a deeply technical mission: representing and verifying information in a structured, trustworthy way.

What you’ll do
  • Design, build, and maintain scalable graph-based data pipelines (batch and streaming)
  • Model and manage RDF/semantic graphs using ontologies (OWL), SHACL, and SPARQL
  • Integrate with property graph systems (e.g. Cypher for Neo4j or similar)
  • Explore and work with graph databases such as Neo4j, JanusGraph, or Amazon Neptune
  • Collaborate closely with the Data and AI teams on data modeling, storage, and transformation
  • Help shape the representation layer of AI-driven systems using semantic technologies
  • Promote a culture of clean, reliable, and meaningful data engineering
What we’re looking for
  • 2+ years of hands-on experience with Knowledge Graphs or Semantic Web technologies
  • Background in Data Engineering or Data Science (engineering preferred)
  • Experience with RDF, OWL, SHACL, and SPARQL
  • Knowledge of property graphs (Cypher) and graph DBs (Neo4j, JanusGraph, etc.)
  • Proficiency with general data engineering tools (e.g. Python, SQL, Spark, Kafka)
  • Familiarity with AWS Neptune or similar managed graph solutions is a plus
  • Language: B2+ in either English or Spanish
  • Curious, collaborative, and excited to tackle a specialized, high-impact challenge
Why join Cala AI?
  • Work alongside a founder with a proven track record in AI startups
  • Join a company dedicated to building AI for good - focused on trust and impact
  • Competitive compensation package plus stock options
  • Based in Cloudworks, a dynamic co-working space near Passeig de Gràcia in Barcelona; enjoy the perks that come from being part of Cloudworks, like gym subscription and restaurant discounts
  • A supportive, inclusive, and horizontal culture that values authenticity and growth
Hiring Process (Conversation-Based)

  • Intro chat with CTO (projects & motivation)
  • System design interview (onsite preferred)
  • Cultural fit chat with CEO
  • Offer

We welcome applicants from diverse backgrounds who bring passion, curiosity, and resilience. If this sounds like you, get in touch — we’re excited to see what we can build together. 
 

Leer la descripción completa

Acerca de Cala AI

  • Ai

  • Barcelona, Spain

  • 5-10

  • 2024

From the founder of Vilynx — a Barcelona AI startup acquired by Apple — comes Cala AI: a bold new venture redefining how information is verified and represented at massive scale. Based in Barcelona’s vibrant tech hub near Passeig de Gràcia, Cala AI is building innovative AI systems focused on trust, accuracy, and impactful technology that challenges industry norms.

Recently, Cala AI was named by Creandum to their #EuroSeed50 list — highlighting the most promising early-stage startups in Europe — an honor that reflects the strong belief in our mission and team. We are a small, ambitious group dedicated to building real solutions with grit, heart, and a culture of authenticity.

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