Fullstack (Backend Focus)
BUSINESS INSIGHTS · Barcelona, ES
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
✅ 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
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