ppbCala AI is hiring a Data Engineer: /b from the founders of Vilynx (acquired by Apple), join a EuroSeed50 startup building AI systems for large-scale information verification. /p /brpCompetitive salary + stock options /p /brpStock options, versátil benefits (transport, meals, health insurance), no-coding-test hiring process, high ownership/autonomy at early stage /p /brh3About Cala AI /h3 /brpFrom 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. /p /brpRecently, 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. /p /brpWe are now growing our engineering team with an experienced Data Engineer who enjoys working across boundaries - data, backend, infrastructure, and applied AI. /p /brh3About the role /h3 /brpWe're looking for an experienced data engineer with depth. /p /brpYou'll come from a Data Engineering background - big data pipelines, storage systems, processing frameworks - but what matters most is your motivation to build across layers and solve complex problems end-to-end. Data is your anchor, but this is a high-impact engineering position for someone who enjoys working with multiple parts of the system rather than in a narrow specialization. /p /brpYou’ll architect,



build, and scale the data systems that power large-scale AI-driven information verification and representation, engaging with emerging information representation systems like embeddings, Knowledge Graphs, and search engines to help shape the future of AI-driven data. /p /brh3What you'll do /h3 /brulliDesign and maintain scalable, high-throughput data pipelines and ETLs (batch and streaming) /liliArchitect data storage and retrieval systems using SQL and NoSQL technologies (Cassandra, graph databases) for efficient processing /liliCollaborate closely with the team on system design and data modeling /liliWork with cloud infrastructure on AWS and containerized environments (Kubernetes) /liliIntegrate and experiment with ML-based data representation techniques and emerging AI engineering tooling /liliContribute to a culture of clean, pragmatic, high-quality engineering /li /ul /brh3Things we value /h3 /brpStrong background in: /p /brpTechnical stack we commonly work with: /p /brulliBig data pipelines (Spark, Hadoop, Kafka or equivalent) /liliPython or Scala (Java welcome) /liliAWS /liliSearch and graph databases (Elasticsearch, Neo4j) are a nice to have /liliDevOps practices /li /ul /brh3Profile: /h3 /brulli4+ years of hands-on data engineering experience, with real depth - you've gone deep,



not wide and shallow /liliAble to reason about and justify your technical decisions: pros, cons, why A over B /liliBuilders at heart: hackathons, side projects, open-source contributions, active GitHub are all highly appreciated /liliCurious about how things work end-to-end, including the parts adjacent to your own - infrastructure, backend, the systems your data feeds /liliCurious about the AI ecosystem and modern developer tooling /liliComfortable in a fast-moving startup environment /liliC1+ level in either English or Spanish (fluency in either is acceptable) /li /ul /brpWe are intentionally building a diverse team. We strongly encourage applications from women, underrepresented groups in tech, and individuals from non-traditional or less represented backgrounds. Diverse perspectives are critical to building responsible AI systems. /p /brpIf you're excited about the role but don't meet every requirement, we'd still love to hear from you. /p /brulliStock options /liliNew office on Gran Via (Barcelona), with a full dedicated space for Cala AI /liliFlexible benefits covering transport, meals, and health insurance /liliWork alongside founders with a proven track record in AI startups /liliBuild foundational AI systems with an "AI for good" focus /liliHigh ownership, high autonomy, real technical challenges /liliJoin at an early stage and help shape both technology and culture /liliA supportive, inclusive, and horizontal team environment /li /ul /brh3Hiring Process – Conversation-Based (No Coding Tests) /h3 /brulliInitial chat with team member focused on experience and projects /liliSystem design interview with CTO (onsite preferred) /li /ul /p #J-18808-Ljbffr

📌 Data Engineer (Barcelona)
🏢 JobFluent
📍 Barcelona