Senior .NET Developer (Freelance)

We are looking for a Senior .NET Developer to join a long-term international project and work on building scalable, high-impact digital solutions. This is a great opportunity for a professional who enjoys working with modern architectures, event-driven systems, and cloud technologies.

What You’ll Do

• Develop and maintain systems in .NET Framework and .NET Core.
• Improve and maintain legacy systems ensuring stability and scalability.
• Design and implement microservices-based solutions, using Kafka as an Event Hub.
• Work with both NoSQL and relational databases to build robust data solutions.
• Implement and maintain Azure Functions and other serverless solutions.
• Write unit and integration tests, perform code reviews, and enforce best practices.
• Collaborate with the architecture team to define standards and best practices.
• Support the frontend team with Angular-based applications (React knowledge is a plus).

What We’re Looking For

• Advanced experience in C#, .NET Framework, and .NET Core.
• Proven experience with legacy systems maintenance.
• Experience designing microservices architectures and event-driven systems (Kafka/Event Hub).
• Strong knowledge of SQL Server/MySQL and NoSQL databases (MongoDB, CosmosDB).
• Familiarity with CI/CD pipelines, design patterns (DDD, CQRS), and Docker/Kubernetes (nice to have).
• Must be based in Spain or Portugal with knowledge of Spanish or Potuguese

Why Join Us?

• Long-term freelance contract with stable workload (160h/month).
• Work with a multinational tech team on a cutting-edge product.
• Competitive hourly rate
• Hybrid or remote flexibility (depending on location).