Senior Full-Stack Ai Engineer — Valencia Hybrid

Hubblr; Madrid; Hybrid; EUR 85,000 - 105,000; Full time

Job summary

Kyndryl is seeking a Senior AI Engineer in Madrid/Barcelona to design, develop, and deploy innovative AI solutions using Generative AI, LLMs, RAG, and agentic AI frameworks. You will collaborate with cross-functional teams to deliver production-ready AI services and scalable APIs across cloud environments.

You will evaluate models and frameworks, contribute to PoCs, and drive end-to-end AI project lifecycles from prototyping to deployment, while continuously learning and applying new AI

Qualifications

• Bachelor's Degree in Computer Science, Software Engineering, Data Science, Mathematics, Telecommunications, or a related field.
• 4+ years of experience in software engineering, data science, machine learning, or artificial intelligence.
• Hands-on experience with Python development.
• Experience with LLMs and Generative AI solutions.
• Practical experience developing or implementing RAG-based applications.
• Strong analytical and problem-solving skills.
• Professional level of English and Spanish.

Responsibilities

• Develop AI-powered applications using Large Language Models (LLMs).
• Design and implement Retrieval-Augmented Generation (RAG) solutions.
• Build and integrate AI agents and multi-agent workflows.
• Develop scalable services and APIs to support AI use cases.
• Participate in the end-to-end lifecycle of AI projects, from prototyping to production deployment.
• Evaluate new models, frameworks, and AI technologies.
• Contribute to PoCs and innovation initiatives.
• Benchmark AI models and assess solution performance, cost, and scalability.
• Explore emerging trends in Agentic AI and Generative AI.
• Integrate AI solutions with enterprise applications, databases, and business processes.
• Collaborate with architects, platform engineers, and cloud specialists.
• Support deployment and monitoring activities across cloud environments.

Skills

Python development

LLMs & Generative AI

RAG-based applications

Analytical problem-solving

English & Spanish proficiency

Education

Bachelor's Degree in Computer Science, Software Engineering, Data Science, Mathematics, Telecommunications, or related field

Tools

LangGraph

CrewAI

AutoGen

Semantic Kernel

Vector databases & embeddings

MLOps / LLMOps

Job description

Partially Remote
Madrid, Spain
Barcelona, Spain
Full time
R-69650

Who We Are

At Kyndryl, we run and reimagine the mission‑critical technology systems that drive advantage for the world's leading businesses. We are at the heart of progress; with proven expertise and a continuous flow of AI-powered insight, enabling smarter decisions, faster innovation, and a lasting competitive edge. For our people-Kyndryls-that means doing purposeful work that powers human progress. Join us and experience a flexible, supportive environment where your well-being is prioritized and your potential can thrive.

The Role

Senior AI Engineer

At Kyndryl, we are helping clients transform their businesses through the adoption of Artificial Intelligence. As a Senior AI Engineer, you will work on the design, development, and deployment of innovative AI solutions leveraging Generative AI, Large Language Models (LLMs), Retrieval‑Augmented Generation (RAG), and Agentic AI frameworks. You will collaborate with multidisciplinary teams to build production‑ready AI solutions, explore emerging technologies, and help clients unlock value from AI‑driven innovation.

Key Responsibilities

• Develop AI‑powered applications using Large Language Models (LLMs).
• Design and implement Retrieval‑Augmented Generation (RAG) solutions.
• Build and integrate AI agents and multi‑agent workflows.
• Develop scalable services and APIs to support AI use cases.
• Participate in the end‑to‑end lifecycle of AI projects, from prototyping to production deployment.
• Evaluate new models, frameworks, and AI technologies.
• Contribute to Proofs of Concept (PoCs) and innovation initiatives.
• Benchmark AI models and assess solution performance, cost, and scalability.
• Explore emerging trends in Agentic AI and Generative AI.
• Integrate AI solutions with enterprise applications, databases, and business processes.
• Collaborate with architects, platform engineers, and cloud specialists.
• Support deployment and monitoring activities across cloud environments.

Who You Are

• Bachelor's Degree in Computer Science, Software Engineering, Data Science, Mathematics, Telecommunications, or a related field.
• 4+ years of experience in software engineering, data science, machine learning, or artificial intelligence.
• Hands‑on experience with Python development.
• Experience working with Large Language Models (LLMs) and Generative AI solutions.
• Practical experience developing or implementing RAG‑based applications.
• Strong analytical and problem‑solving skills.
• Professional level of English and Spanish.

Preferred Qualifications

• Experience with Agentic AI frameworks such as LangGraph, CrewAI, AutoGen, Semantic Kernel, or similar.
• Experience with vector databases and embeddings.
• Knowledge of MLOps or LLMOps practices.
• Experience deploying AI solutions in production environments.

Being You

The "Kyn" in Kyndryl means kinship, which represents the strong bonds we have with each other, our customers and our communities. We focus on ensuring all Kyndryls feel included and we welcome people of all cultures, backgrounds, and experiences. Even if you don't meet every requirement, we encourage you to apply. We believe in growth, and we're excited to see what you can bring. At Kyndryl, employee feedback has told us that our number one driver of employee engagement is belonging. That sense of belonging - being a valued, respected, trusted member of the team - is fundamental to our culture and fueling great experiences for our customers. This dedication to welcoming everyone into our company means that Kyndryl gives you the ability to thrive and contribute to our culture of empathy and shared success. That's The Kyndryl Way.

What You Can Expect

Your career with us isn't just a job-it's an adventure with purpose. We offer a dynamic, hybrid‑friendly culture that supports your well‑being and empowers you to grow. Our Be Well programs are thoughtfully designed to support your financial, mental, physical, and social health-because we know that when you feel your best, you do your best.

From your very first day, you'll dive into impactful work that powers the systems our customers rely on every day. You won't just contribute-you'll make a difference, tackling meaningful projects that sharpen your skills and fuel your growth. We'll champion your journey with powerful tools to chart your career path, personalized development goals aligned with your ambitions, and continuous feedback to keep you inspired and on track. You'll develop in‑demand skills to grow your career and achieve your ambitions with access to cutting‑edge learning opportunities from certifications with Microsoft, Google, and Amazon to coaching and hands‑on experiences. And through it all, you'll be part of a culture that values empathy, restless learning, and a devotion to shared success.