We are looking for a Senior Full Stack Software Developer to help us scale AI assets and develop innovative Retrieval‑Augmented Generation (RAG) products.
About the role
In this role, you will work at the intersection of cutting‑edge LLMs, intelligent agents, and application development, contributing directly to the future of AI‑driven solutions. You will be responsible for developing scalable backend services, building intuitive frontend interfaces, and enhancing our Document Understanding product.
Qualifications
- Technical Mastery: Senior expertise in Full Stack development combining Python (backend) and React.js / Node.js (frontend), along with containerization using Docker.
- AI & Innovation: Strong understanding of Large Language Models (LLMs), Retrieval‑Augmented Generation (RAG), and agentic architectures. Proven experience with LangChain is highly preferred.
- Cloud & Infrastructure: Familiarity with Cloud environments (Amazon AWS, Azure) and AI model deployment/optimization.
- Soft Skills & Language:



Fluency in English (mandatory for our international environment) combined with excellent communication, adaptability, problem‑solving, and teamwork skills.

Location
Hybrid Model - Barcelona
Sector
IT / Artificial Intelligence & Software Development
Benefits
- People first – inclusive, diverse, and international culture.
- Work with cutting‑edge technology on general‑scale products.
- Clear opportunities for career progression and continuous development.
- Collaborative teams with a strong sense of belonging.
- Access to learning resources and development programs.
- Competitive compensation.
- Private health insurance & benefits (according to region).
- Flexible working environment and hybrid model.
- Wellness and mental‑health initiatives.
- Team‑building activities and general community events.
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📌 Senior Full Stack Developer (España)
🏢 Capitole
📍 España