Company Overview

Flow Dev is a software development company providing cutting-edge technology solutions, outsourcing services, marketing strategies, and innovative solutions. We foster a culture of innovation, collaboration, and excellence with a globally distributed remote team.

Role Overview

We are seeking a skilled and experienced Senior Backend Developer - .NET/C# Position Required Technical Skills:

• Extensive experience with C# 10+ and ASP.NET Core
• Strong knowledge of Clean/Onion Architecture principles and implementation
• Proficiency with Entity Framework Core and SQL database design/optimization
• Experience with RESTful API design and implementation
• Strong understanding of domain-driven design (DDD) and CQRS patterns
• Experience with JWT authentication/authorization and Azure AD B2C
• Proficiency with message-based architecture using Kafka or similar technologies
• Experience with caching strategies (Redis, in-memory caching)
• Knowledge of MongoDB and/or other NoSQL databases
• Experience with SignalR or similar real-time communication technologies
• Familiarity with microservices architecture and containerization (Docker)
• Experience with health checks and API monitoring implementations
• Strong understanding of dependency injection and service registration patterns

Required Experience

• 5+ years of professional experience with .NET/C# development
• 3+ years of experience with ASP.NET Core
• Experience developing scalable, high-performance backend systems
• Experience implementing and working with CI/CD pipelines (Azure DevOps)
• Experience designing and implementing complex database schemas
• Proven experience with version control systems (Git)

Core Responsibilities

• Design and implement domain models adhering to Onion Architecture patterns
• Create and maintain RESTful APIs with proper authentication/authorization
• Implement repository patterns and data access layers
• Develop efficient background services and cron jobs for scheduled tasks
• Work with event-based communication using Kafka producers/consumers
• Implement proper error handling and validation across all application layers
• Maintain separation of concerns across architecture layers
• Enhance existing features while ensuring backward compatibility
• Troubleshoot and optimize performance bottlenecks
• Write automated tests for domain logic and infrastructure components

Preferred Skills (Nice to have – not mandatory)

• Experience with Azure cloud services and deployment
• Knowledge of Swagger/OpenAPI documentation
• Experience with implementing monitoring and observability solutions
• Familiarity with payment processing systems and integrations
• Understanding of gaming/gambling industry regulations (beneficial)
• Experience with real-time data processing
• Knowledge of CQRS and event sourcing patterns