Full Stack Web Developer (Backend Focus) – Multi-cloud GenAI Platform / Secure GPT

We are looking for a Full Stack Web Developer with a strong backend focus to join our AI products team, developing a multi-cloud GenAI platform (Azure, AWS, Google Cloud), with a primary focus on the Secure GPT service. This is a key technical role in an international environment where you will contribute to the design, development, and evolution of cutting-edge generative AI capabilities, ensuring security, scalability, and compliance.

Responsibilities:

• Design, develop, and enhance Secure GPT service features (RAG, agents, document understanding, translation, APIs, automation).

• Participate in the entire development lifecycle: analysis, technical design, implementation, testing, documentation, and monitoring.

• Build and maintain robust and scalable APIs.

• Define and monitor product usage and performance KPIs.

• Develop automations and platform efficiency enhancements.

• Collaborate with the Tech Lead and Product Owner in an international team.

• Ensure compliance with security standards, regulatory requirements, and corporate architecture.

• +5 years of experience in backend web development (preferably in Azure or cloud environment).

• Node.js (backend) and React / Next.js (light frontend).

• Design and implementation of REST/GraphQL APIs.

• Full testing experience: Unit testing.

• End-to-end (E2E).

• Azure: App Services.

• Cosmos DB.

• Application Insights.

• Observability and monitoring.

• CI/CD with Azure DevOps.

• Knowledge of Infrastructure as Code (IaC).

• Experience with AI APIs: OpenAI, Azure AI, Anthropic, or Gemini.

• Knowledge of: RAG (Retrieval-Augmented Generation).

• Agents / agentic frameworks.

• Experience in prompt engineering (design, iteration, and optimization of prompts).

• Autonomous mindset: end-to-end ownership of functionality.

• Proactive, solution-oriented approach.

• Ability to work in changing environments.

• Good level of English (minimum B1).

• Teamwork in an international context.

Languages: Spanish and English. Location: Barcelona. Occasional travel: France, Spain, or Portugal.

An extra day off on your birthday to celebrate it your way! Enhanced paid holidays for better personal and professional balance. Access to private medical insurance for your peace of mind. Additional vacation days based on your seniority, because we value your rest and well-being.

At Pasiona, we advocate for diversity and equal opportunities. We encourage everyone to apply, regardless of their gender, age, disability, sexual orientation, gender identity, ethnic origin, religion, or any other personal or social circumstance.