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# Fullstack Engineer

- **Company:** Sienasiena
- **Location:** Cantabria, Spain
- **Contract:** Permanent contract
- **Skills:** Amazon Web Services, Amazon Elastic Compute Cloud, PostgreSQL, Node.Js, ReactJS, Large Language Models, Git, AWS Fargate, Functional Programming, Amazon Simple Queue Service (SQS), Terraform, Microservices
- **Published:** November 11, 2026
- **Apply:** https://www.adzuna.es/details/5960856563

## About the Role

Share what you know, review thoughtfully, help teammates level up.
Who You AreThe Barif you're missing any of these, this isn't the role for you 5+ years shipping and owning systems that are live in production, not personal projects.Strong in our core stack: Node.Js, React, Type Script, Express.You've shipped LLM-powered features to real users.
This is a must, not a bonus.
You know what breaks when models meet production traffic.
Strong Signalnot dealbreakers, but what separates a good hire from a great one Solid with AWS (Fargate, Lambda, EC2, SQS), Postgre SQL, and Redis.Comfortable with CI/CD pipelines (Code Pipeline, Git Hub Actions, or similar).
Experienced with microservices and scalable systems.Product-focused.
You think past the code to customer outcomes and business impact.High-ownership and direct.
You fix problems without waiting to be told.
Nice to Havebonus, not required Next.Js.Infrastructure as Code (CDK, Terraform).
Python.Event-driven architecture.Background in customer support or CX software.
Not a Fit If You want tickets assigned to you and a clear spec before you start.You've only worked on internal tools, never shipped something real users depend on every day.You need a manager checking in regularly to stay motivated.