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# Senior Software Engineer

- **Company:** Eira Technology
- **Location:** Barcelona, Spain
- **Salary:** €60,000.0 - €80,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Software as a Service, Cloud Computing, Data Systems, Programming Tools, Software Construction, Large Language Models, Backend, Data Management
- **Published:** July 17, 2026
- **Apply:** https://es.indeed.com/viewjob?jk=3142667c7b442569

## About the Role

We're looking for a senior engineer with strong backend, infrastructure, and systems judgment who has taken complex products or technical systems into production.

You should be comfortable across APIs, cloud infrastructure, data systems, reliability, observability, security, and product-facing workflows. Your deepest expertise is likely backend or platform, but you should be willing to work across the stack when the product needs it.

You should be able to reason clearly about data models, failure modes, cost, maintainability, deployment, and user impact. You should enjoy ambiguity, broad ownership, and building foundations that other engineers, scientists, and users can depend on.

You do not need to know biology already. We can teach you. But you should be curious about scientific data, willing to learn from scientists, and motivated by building tools for a domain where correctness, context, and trust really matter.

You should be excited about building software around AI agents and large language models as a real engineering challenge. You understand that these systems are powerful but limited, and you want to build architecture that is robust today and ready to improve as capabilities mature.

Nice to Have

 * Experience in an early-stage startup, deep tech company, high-growth company, or fast-moving product team.
 * Experience with AI-native products, agentic workflows, data platforms, workflow-heavy software, developer tools, or technical SaaS.
 * Experience with scientific, healthcare, biotech, laboratory, or other complex technical domains.
 * Experience with modern cloud infrastructure, infrastructure-as-code, observability, security, or deployment systems.
 * Experience designing systems for complex, messy, evolving, or high-value data.



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