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 CrossWorkers

We 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.