Senior C# / .NET Core Developer

Title: Senior C# / .NET Core Developer Industry: IT Software Reporting Line: Engineering Manager/ Service Delivery Manager Position Type: Full Time Location: Cairo We are looking for a highly skilled and driven Senior C# / .NET Core Developer to build and evolve modern backend systems within a complex, service-based architecture. This role involves working on high-performance services, including edge and IoT scenarios, while leveraging modern development practices and AI-enhanced workflows. Key Responsibilities:Backend Development: Design, build, and maintain backend and background services using modern .NET Develop and maintain REST and gRPC APIs Work within a large, mature codebase by extending, refactoring, and modernizing services Design efficient data access layers using relational databases System Architecture & Performance: Build and operate distributed and event-driven systems Ensure high performance and resource efficiency, especially in edge/IoT environments Apply spike-driven development to validate new features and approaches AI & Modern Practices: Leverage AI tools and adapt to agentic workflows to enhance development efficiency Continuously explore and adopt modern technologies and practices Collaboration & DevOps: Collaborate with cross-functional teams and contribute to shared architecture standards Use Docker and Azure DevOps (CI/CD pipelines) to support development workflows Desired Skills: Strong expertise in C# and modern .NET (latest versions) Experience with ORMs (e.g., Entity Framework) and relational databases (SQL Server, PostgreSQL, Azure SQL) Solid understanding of asynchronous programming, multithreading, and concurrency Experience building REST APIs and gRPC services Strong experience in unit testing and writing clean, maintainable code Experience with distributed systems and service-based architectures Familiarity with event-driven architectures and messaging patterns Hands-on experience with Docker and CI/CD pipelines (Azure DevOps) Experience working within complex, existing codebases Strong problem-solving and critical thinking skills Experience or interest in AI tools and agentic workflows Very good English communication skills Nice to Have: Experience with Azure services (APIM, AGW, AKS, IoT Edge, Functions, Blob Storage) Experience with time-series databases (InfluxDB, TimescaleDB) Experience with MQTT or similar messaging systems General cloud architecture knowledge Interest in experimenting with new technologies Knowledge sharing and mentoring mindset What We Value: Ownership and a self-driven mindset Clean code, maintainability, and strong documentation practices Pragmatic approach to evolving and modernizing systems Willingness to understand systems end-to-end Proactive adoption of new technologies, especially AI-driven approaches Strong collaboration and knowledge-sharing culture What We Offer: Competitive salary Social & Medical insurance Flexible working environment Professional and supportive work environment Access to modern tools and technologies Continuous learning and development opportunities Clear career growth path About CrossWorkersWe are a Danish-owned software offshoring company providing European clients with professional Egyptian developers. We have been in business since 2009, delivering high-quality software development services and building long-term partnerships. Our headquarters are in Copenhagen, Denmark, and our Offshore Development Center is located in the Fifth Settlement, New Cairo. We also have a growing presence across Sweden, Norway, Finland, Switzerland, the UK, Germany, and Bahrain. Show more