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Business Insights

Fullstack (Back end - AI)

Business Insights · SOFTWARE

Barcelona

Mid-level

Full stackAzureCI/CDCosmos DBLLM / GenAINext.jsNode.jsOpenAIReactTerraformTypeScript

Last seen 2w ago

Posted
1mo ago

Posted on 24 September 2026

Workplace
Hybrid

Work model: Hybrid

Salary
Not disclosed

Salary range not shared by the company

Visa sponsorship
Not specified

Visa sponsorship details unknown

This role has closed. It's kept as a record — see Business Insights's open roles or the similar live roles below.

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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

About Business Insights

Business Insights is a Spanish data and analytics consultancy, hiring across engineering and analysis in Madrid.