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Fullstack (Back end - AI)

  • Hybrid
    • Barcelona

Job description

We’re looking for a Senior Backend Engineer to join an AI team working on a Secure GPT platform (an internal ChatGPT-like solution) used across a global environment.

The focus of the role is to build real AI features in production, making them scalable, secure, and actually useful for the business.

🧩 What you’ll be doing

  • Building and improving backend features (mainly Node.js / TypeScript)

  • Working on GenAI use cases like:

    • document understanding

    • translation

    • agent-based workflows

    • APIs and automation

  • Owning your work end-to-end (from design to production and monitoring)

  • Defining and tracking how features perform (KPIs, usage, etc.)

  • Collaborating with product and tech teams in an international setup

  • Continuously improving how things are built and scaled

🛠️ Tech environment

  • Backend: Node.js, TypeScript

  • Frontend: React / Next.js (light involvement)

  • Cloud: Azure (App Services, Cosmos DB, monitoring)

  • CI/CD and DevOps practices

  • GenAI: OpenAI, Azure AI, RAG, agents, prompt engineering

Job requirements

✅ What we’re looking for

  • Solid backend experience (ideally 5+ years)

  • Strong Node.js / API development background

  • Hands-on experience with AI in real use cases (LLMs, RAG, agents…)

  • Comfortable working in cloud environments (Azure is a plus)

  • Someone who takes ownership and can work end-to-end

  • Practical, problem-solving mindset

  • Comfortable working in English

➕ Nice to have

  • Terraform / Bicep

  • Observability / monitoring experience

  • Exposure to regulated environments or security topics

💡 Why it’s interesting

  • You’ll be working on AI that is already in production, not just experiments

  • Real ownership of what you build

  • Modern stack + interesting technical challenges

  • Strong mix of backend + AI

Hybrid
  • Barcelona, Catalunya [Cataluña], Spain
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