Backend Engineer FTC | AI Scale-up | Barcelona or 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.
