Barcelona, Spain
59 days ago
Senior Backend .NET Developer
We are looking for a Senior .NET Developer with solid experience in designing and building scalable, testable, and maintainable backend services. You will focus primarily on engineering robust APIs and service layers using .NET, while occasionally contributing to Windows desktop application development where needed.

This role is ideal for engineers who care deeply about clean architecture, automation, and solving real-world problems through backend excellence. You’ll collaborate cross-functionally to deliver reliable, performant systems that power key business applications.

This is a hybrid role requiring 3 days per week in our Barcelona office.

First 90 Days
• 30 days – Ramp up on Sage’s architecture, services, and backend standards. Understand deployment flows and key integrations.
• 60 days – Actively contribute to key product initiatives and features in development. Demonstrate increasing ownership and impact within the engineering team. Begin contributing meaningful code to the main product codebase.
• 90 days – Take full ownership of feature delivery, from planning to release. Lead code reviews and ensure adherence to quality and best practices. Participate in architectural discussions and help shape technical direction.

Meet the Team
You’ll report to an Engineering Manager based in Barcelona and collaborate with colleagues across backend, desktop, QA, DevOps, and product teams. The team works in a global Agile structure and values code quality, autonomy, and continuous improvement.

How Success Will Be Measured
• Consistent delivery of performant and reliable .NET Core backend services
• Active contribution to service design, performance tuning, and codebase health
• Impactful collaboration with cross-functional teams on features and deployments
• Adoption and promotion of architectural patterns and engineering standards

Skills You’ll Gain
• Deep expertise in .NET Core services, clean architecture, and API design
• Experience collaborating on desktop + backend integrations
• Broader exposure to DevOps, CI/CD, and containerization practices
• Involvement in architectural decision-making and backend scaling challenges
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