Back End Developer

Backend Engineer FTC | AI Scale-up | Zaragoza (Hybrid)

I’m partnered with a Series B scale-up, well funded, globally recognised, and award-winning, looking for a backend engineer to join the team immediately.

You’ll be building backend systems that sit directly behind AI and research workflows. This role is about turning experimental code, data pipelines, and model outputs into reliable services that can be used, measured, and scaled.

What you’ll do

Build and maintain backend services that power AI tooling and internal platforms

Design and own APIs used for experimentation, evaluation, and automation

Turn research prototypes into stable, production-ready microservices

Build data pipelines and background jobs for model execution and system workflows

Integrate services across data, CI/CD, and ML systems

Improve performance, reliability, and observability of backend systems

Work closely with research, product, and frontend engineers on clear backend contracts

How the stack looks in practice

Python or Go for backend services

FastAPI or similar frameworks for API development

REST and or gRPC for service communication

PostgreSQL or MySQL for relational data

Docker-based development with CI/CD pipelines

AWS for deployment and infrastructure

Event-driven components and background processing where needed

If you enjoy building backend systems that directly support real AI workloads in production, this is worth a conversation.