Backend Engineer - Fixed Term Contract / Infrastructure and Automation We’re looking for a number of Backend Engineers to help build robust services and automation pipelines that support next generation AI and quantum‑inspired technologies. The team enables model compression that reduces LLM size by up to 95 % and cuts inference costs by up to 80 %, allowing integral organisations to deploy AI at scale with far greater efficiency.

This is a fixed‑term contract, based in Zaragoza, working on a hybrid basis through mid‑2026 and includes a competitive package with signing and retention bonuses (plus relocation assistance if needed).

In this role you will:

Develop and maintain backend services in Python or Go

Build APIs and microservices that power internal tools and research workflows

Work with Docker and cloud environments to deploy scalable systems

Design relational schemas and manage database integrations

Automate workflows across data, CI/CD, and machine‑learning systems

Collaborate with product and design teams to define backend contracts for intuitive user experiences

Contribute to observability, testing, and continuous delivery practices

What you’ll need

Two to five years backend development experience

Strong understanding of REST or gRPC service design

Experience with Docker and familiarity with Kubernetes





Proficiency with PostgreSQL or MySQL and schema design

Experience automating or integrating workflows across multiple systems

Solid Git practices and experience with CI/CD tools

Cloud experience with AWS or similar environments

Exposure to ML pipelines, model serving, or event‑driven architectures is a plus

Interest in turning prototypes into stable production services

If you’re excited to work at the intersection of backend engineering, automation, and advanced AI workloads, we’d be glad to share more. If you’re motivated by creating clean, thoughtful interfaces that streamline complex workflows, we’d love to hear from you.

In accordance with local employment laws, applicants must have current, valid authorisation to work in Spain at the time of application. We are unable to sponsor employment visas for this role. Applications from individuals without existing work authorisation for Spain cannot be considered.

If this sounds interesting and you’d like to learn more, click the link below to apply or email me with a copy of your CV on [email protected]

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📌 Backend Engineer - Fixed Term Contract / Infrastructure and Automation (Madrid)
🏢 European Tech Recruit
📍 Madrid