Our partner is looking for a Senior .NET Developer (Fintech) based in Spain. We are looking for a senior backend engineer to build and maintain reliable financial technology services supporting payment processing and business operations. In this role, you will develop scalable microservices and robust integrations for complex workflows such as reconciliation, payouts, settlements, and fee calculations.

You will work with modern cloud infrastructure and database technologies to deliver secure, high-performance solutions. Working within an international, fully remote team, you will contribute to technical decisions, maintain clear documentation, and share knowledge with fellow engineers. This is an opportunity to take ownership of critical fintech systems in a dynamic, product-driven environment.

Develop and maintain backend services supporting payment processing and back-office operations, including reconciliation, payouts, fee calculations, settlements, and B2B client dashboards. Build and optimize microservices to meet performance and reliability objectives, including p95/p99 latency targets and SLA/SLO requirements. Implement monitoring, alerting, and operational practices to maintain service availability and quickly identify potential issues.

Use AI-powered development tools and agents throughout the software delivery process, from task definition to implementation.



Thoroughly review and validate AI-generated code, ensuring correctness, maintainability, security, and appropriate test coverage. Write clean, well-structured code and develop automated tests to support software quality and long-term maintainability.

At least 5 years of commercial software development experience with C# and ASP.NET Core. Hands?on experience with Microsoft Azure, Docker, and Azure Kubernetes Service (AKS). Practical experience with Microsoft SQL Server, MongoDB, and Cosmos DB.

Strong commitment to clean, maintainable code and automated testing.

Background in payment processing, financial technology, or banking systems. Fully remote, full?time work arrangement, with the flexibility to work from different locations worldwide. Performance?Wellbeing Wallet of up to €2,800 per year after the integration period, available for medical expenses, therapy, dental care, pharmacy costs, fitness, sports activities, and emotional wellbeing.

Necessary technical equipment provided, plus a €1,000 budget for setting up a home office or renting a coworking space.

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📌 Senior .Net Developer (Fintech) (Santiago de Compostela)
🏢 Jobgether
📍 Santiago de Compostela