API Azure Senior Engineer (Backend Tech Lead) Location: Remote from Spain Contract: 12 month contract + extensions Rate: €30–€35/hour (Gross) Start: ASAP Role Overview We are seeking an experienced API Azure Senior Engineer / Backend Tech Lead to design, architect, and deliver cloud-native backend solutions using Microsoft Azure and .NET. You will work heavily with REST APIs, Azure services, containerization, and CI/CD pipelines. This is a hands-on senior engineering role within an enterprise environment. Key Responsibilities • Design, develop, and test REST APIs and backend services. • Build cloud applications using .NET 6+ and C# . • Architect backend and integration solutions leveraging Azure Functions, Service Bus, AKS, APIM , and more. • Lead solution design, code reviews, best practices, and backend architecture decisions. • Work with Docker for packaging and deployment. • Use Azure DevOps and Git for CI/CD pipelines and automated deployments. • Collaborate with cross-functional engineering and product teams. • Propose innovative cloud-native architectural solutions. Requirements • Bachelor's degree in Computer Science or related field. • 8+ years of experience in backend/cloud development. • Strong expertise in C# / .NET 6+ . • Deep knowledge of REST API design and development. • Hands-on experience with Azure cloud services , including: – Azure Functions – Azure Service Bus – AKS (Azure Kubernetes Service)– Azure API Management (APIM)• Experience with Docker and containersation. • Experience with Azure DevOps , Git, CI/CD pipelines. • Strong English communication skills. • Ability to lead backend technical delivery independently.