Etech Global Services
Sr C# Developer
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The Senior C# Developer will lead AI enablement by transforming APIs into an Agent Mesh using C# and the MCP, ensuring secure AI interactions through Gravitee management.
This is a remote position.
Job SummaryWe are seeking a highly skilled C#/.NET Developer with hands-on experience in building AI-powered applications using Large Language Models (LLMs) and Retrieval-Augmented Generation (RAG) architectures. The ideal candidate will have strong expertise in developing scalable .NET applications, integrating AI services through APIs, and building enterprise-grade AI solutions.
The candidate should have experience working with modern AI frameworks, vector databases, prompt engineering, and API management platforms to deliver intelligent, secure, and scalable applications.
- Design, develop, and maintain enterprise applications using C#, .NET Core/.NET 8, and ASP.NET Core.
- Build AI-powered applications leveraging Large Language Models (LLMs) such as Azure OpenAI, OpenAI, Anthropic Claude, or Google Gemini.
- Design and implement Retrieval-Augmented Generation (RAG) solutions using enterprise knowledge bases and vector databases.
- Develop and integrate RESTful APIs for AI services and third-party applications.
- Work with API gateways and API management platforms (e.g., Gravitee, Kong, Azure API Management, Apigee).
- Develop scalable backend services for AI inference, document processing, and conversational applications.
- Implement secure authentication and authorization using OAuth2, JWT, and Azure Active Directory.
- Collaborate with architects, product owners, and cross-functional teams to translate business requirements into technical solutions.
- Optimize application performance, scalability, and reliability.
- Participate in code reviews, unit testing, CI/CD deployments, and Agile ceremonies.
- Create technical documentation and support production deployments.
- 5+ years of experience in C#/.NET application development.
- Strong expertise in C#, .NET Core/.NET 6+, ASP.NET Core, and REST API development.
- Hands-on experience integrating Large Language Models (LLMs) into enterprise applications.
- Practical experience designing and implementing RAG (Retrieval-Augmented Generation) solutions.
- Experience consuming AI services through REST APIs and SDKs.
- Knowledge of prompt engineering and AI application development patterns.
- Strong understanding of object-oriented programming, design patterns, and microservices architecture.
- Experience with SQL Server or other relational databases.
- Proficiency with Git and CI/CD tools such as Azure DevOps or GitHub Actions.
- Experience working in Agile/Scrum environments.
What you need to know about the Seattle Tech Scene
Home to tech titans like Microsoft and Amazon, Seattle punches far above its weight in innovation. But its surrounding mountains, sprinkled with world-famous hiking trails and climbing routes, make the city a destination for outdoorsy types as well. Established as a logging town before shifting to shipbuilding and logistics, the Emerald City is now known for its contributions to aerospace, software, biotech and cloud computing. And its status as a thriving tech ecosystem is attracting out-of-town companies looking to establish new tech and engineering hubs.
Key Facts About Seattle Tech
- Number of Tech Workers: 287,000; 13% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Amazon, Microsoft, Meta, Google
- Key Industries: Artificial intelligence, cloud computing, software, biotechnology, game development
- Funding Landscape: $3.1 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Madrona, Fuse, Tola, Maveron
- Research Centers and Universities: University of Washington, Seattle University, Seattle Pacific University, Allen Institute for Brain Science, Bill & Melinda Gates Foundation, Seattle Children’s Research Institute
