Fullstack (Backend Focus)

Business Insights
Barcelona, Spain
yesterday

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English
Experience level
Senior

Job location

Barcelona, Spain

Tech stack

API
Artificial Intelligence
Azure
Continuous Integration
DevOps
Node.js
Next.js
TypeScript
Cloud Platform System
React
Large Language Models
Prompt Engineering
Backend
Bicep
Cosmos DB
Front End Software Development
Api Design
Terraform
GPT

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

Requirements

Do you have experience in Terraform?, Do you have a Bachelor's degree?, * 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

Apply for this position