Fullstack (Backend Focus)

Business InsightsBarcelonaJob.bopublished 06/15/2026
Must-have:TypeScriptReactNext.jsNode.jsAzureCloudFrontendBackendDevOpsCI/CDAISecuritySenior

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

✅ 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