Senior Back-end Engineer (.NET)

• 5+ years of professional experience in backend development with .NET and C#
• C1 English level or higher
• Proven production experience implementing Clean Architecture and CQRS patterns, such as MediatR
• Modern C#/.NET + custom code: Solid production experience with modern .NET, but also comfortable writing custom logic rather than depending entirely on frameworks (e.g., MediatR/CQRS as one part of a hybrid framework + custom-code system).
• Hands-on experience with AWS (ECS Fargate, RDS)
• Strong MySQL expertise (Dapper for performance-critical queries, EF Core for domain management)
• Solid unit/integration testing practices
• Legacy scripting exposure (plus): Familiarity with PHP or PHP-like scripting is a strong plus, given legacy scripts in the codebase outside of C#

Skills

• .NET
• Clean Architecture
• CQRS
• MediatR
• MySQL
• Dapper
• Entity Framework Core
• AWS Fargate
• AWS RDS
• Unit Testing
• Integration Testing
• AWS
• testing

• Debug, maintain, and support existing C#/.NET services in production, prioritizing stability over rewrites.
• Translate business requirements (e.g., tax logic, compliance rules) into correct technical logicthis matters more than syntactic elegance.
• Work comfortably within legacy or imperfect codebases without the ability to refactor, maintaining consistency with existing patterns.
• Write custom C# code where needed, rather than relying solely on frameworks, the codebase is a mix of framework and custom logic.
• Read and work with legacy scripting (PHP-like syntax) found in some non-C# scripts within the system.
• Collaborate with frontend teams on API contracts and secure integrations with payment providers.

This role focuses on leading the migration of a legacy system to a modern .NET 8+ backend under Clean Architecture. You will operate in a high-availability, highly regulated environment, translating complex business logic into robust, secure Web APIs. This position demands deep technical expertise to ensure precision, reliability, and security across all backend operations. You will collaborate closely with frontend teams to define clear API contracts and implement secure integrations with major payment providers. By optimizing data access paths and ensuring rigorous testing standards, your work will directly impact the performance and scalability of critical transaction systems.

We provide the opportunity to participate in impactful and technically rigorous industrial data projects that drive innovation and professional growth. Our work environment emphasizes technical excellence, collaboration, and continuous innovation.

Niuro supports a 100% remote work model, allowing flexibility in work location globally. We invest in career development through ongoing training programs and leadership opportunities, ensuring continuous growth and success.

Upon successful completion of the initial contract, there is potential for long-term collaboration and stable, full-time employment, reflecting our long-term commitment to our team members.

Joining Niuro means becoming part of a global community dedicated to technological excellence and benefiting from a strong administrative support infrastructure that enables you to focus on impactful work without distraction.