Senior Developer

atwork · Full-time · Remote within Spain or hybrid (Santander / Barcelona)

About the role

We are looking for a Senior Developer to work on our multi-tenant B2B SaaS platform, used by HR teams and by employees across the organisations we work with. The role combines hands-on development with architectural decisions and code review, and carries direct ownership of the areas you work on.

What you will do
- Develop across the stack: .NET 10 and Entity Framework on the back end, Angular 21 on the front end, Azure SQL Database for persistence.
- Participate in architectural decisions: service boundaries, data modelling, tenant isolation and API design.
- Work on multi-tenancy, platform performance, our design system and integrations with third-party systems.
- Review code before it is merged.
- Write automated tests: unit and integration tests on the back end, Playwright UI tests on the front end.
- Contribute to the management of our Azure environment and to infrastructure defined as code with Terraform.
- Maintain technical documentation: architecture decisions,



runbooks and onboarding material.
- Work in an agile environment, collaborating with product, data science and design.

How we work

AI tools support our developers in their day-to-day work and are integrated into how we build software. Keeping that setup growing is part of the team’s work and part of this role. If you are excited about AI and where it is heading, you will have room to run with it.

What you bring
- Bachelor’s or master’s degree in Computer Science or a comparable qualification
- Substantial professional experience building and operating production web applications end to end (typically 5+ years)
- Strong .NET and Entity Framework skills, with solid SQL Server experience
- Extensive Angular experience
- Proficiency with Git and a pull-request-based workflow
- Demonstrated command of clean code, SOLID principles and testing methodology, with the ability to explain why, not on

📌 Senior Developer (España)
🏢 atwork.ai
📍 España