Reference: 50879 Full Stack Engineer (AI Systems) – Remote (General)We’re working with a well-established, tech-led business that is building a new AI product focused on handling real-world tasks, workflows and decision-making.
This is a small, high-calibre team building systems where AI capability is translated into reliable, structured product behaviour, with a strong emphasis on execution and consistency in real usage.
The product focuses on:Long-running workflows
Persistent context
Multi-step task execution
Integration with external systems
The core challenge is designing systems that can apply model capability in a structured and reliable way, even when behaviour is non-deterministic.
The RoleThis role sits at the product layer, connecting backend systems, AI capability and the end-user experience.
The focus is on building systems that enable:AI workflows to run end-to-end within the product
User-facing features that behave consistently under real usage
Real-time interaction with AI-driven systems
You’ll be working on:End-to-end product features across frontend and backend




Agent workflows, including planning, tool usage, failure handling and recovery
Integration of LLMs, memory and external systems into user-facing flows
Real-time interactions, including streaming responses and partial updates
Reliability and fallback behaviour within the product experience
What They Care AboutThe hiring bar is centred around real production experience:Whether you have built and shipped features end-to-end
Your experience working with AI-powered applications beyond simple API usage
Your ability to handle practical challenges such as:
ambiguity in product requirements
failure and recovery in AI workflows
maintaining consistent behaviour in real-world usage
Tech EnvironmentNext.js / React
Python and Node.js
SQL / NoSQL databases
LLM ecosystem (OpenAI, Anthropic, etc.)
Docker and Kubernetes
AWS, Azure or GCP is fine
The emphasis is on how you design and ship product features, rathe

📌 Full Stack Engineer (España)
🏢 Nicoll Curtin
📍 España