businessinsights

Fullstack (Back end - AI)

businessinsights

Barcelona, Españafulltime_permanentPosted Jun 15, 2026

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 ✅ 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