Senior .NET Backend Developer

We are seeking an experienced Senior .NET Backend Developer to design, build, and maintain scalable backend systems that power enterprise-grade applications.

This role is focused on backend architecture, API development, database design, distributed systems, and production reliability. The ideal candidate has deep experience building high-performance .NET applications, designing scalable data models, and supporting production systems operating at scale.

Experience working within larger engineering organizations supporting customer-facing applications is highly valued. Experience with event-driven architectures, message processing systems, and backend platform engineering is a strong plus.

This is an on-site role supporting our Chandler, AZ office., * Design, develop, and maintain backend services using C# and ASP.NET Core

• Build and support scalable REST APIs and internal service platforms
• Design, optimize, and troubleshoot relational database systems
• Develop high-throughput background services and asynchronous processing workflows
• Implement and support event-driven and message-based architectures
• Improve application performance, reliability, observability, and scalability
• Collaborate with frontend, platform, cloud, and DevOps teams
• Participate in architectural planning, design reviews, and technical decision-making
• Write clean, maintainable, testable production code
• Troubleshoot issues across application, service, and database layers
• Support production deployments and ongoing operational improvements
• Contribute to long-term platform stability and engineering best practices

Do you have experience in System performance monitoring?, * 5+ years of professional backend software development experience

• Strong proficiency with C# and modern .NET development
• Extensive experience building APIs and backend services using ASP.NET Core
• Strong SQL development and database optimization skills
• Experience designing and maintaining relational database systems
• Experience with PostgreSQL and/or SQL Server
• Strong understanding of API design, data modeling, and application scalability
• Experience with asynchronous programming, concurrency, and multithreaded systems
• Familiarity with distributed systems and service-oriented architectures
• Experience with logging, monitoring, and production troubleshooting
• Experience working within Git-based development workflows
• Strong communication and collaboration skills

Strong Plus Qualifications

• Experience with RabbitMQ, Kafka, Azure Service Bus, or similar messaging platforms
• Experience building large-scale event processing or message ingestion systems
• DBA-level experience including:
• Query optimization
• Execution plan analysis
• Indexing strategies
• Performance tuning
• Experience supporting frontend applications serving large user bases
• Experience with Redis or distributed caching solutions
• Experience with Docker and containerized application deployments
• Experience deploying applications within Azure environments
• Experience with observability platforms such as:
• Datadog
• Grafana
• Elastic / ELK Stack
• Experience with Blazor development

Technical Environment

• C#
• .NET 8 / .NET 9
• ASP.NET Core
• REST APIs
• SQL Server
• PostgreSQL
• Background Services / Workers
• RabbitMQ / Kafka / Service Bus
• Azure
• Docker
• Git, Successful candidates will demonstrate strong ownership, sound engineering judgment, and the ability to build maintainable systems that operate reliably in production environments., * This position supports U.S. government programs and involves export-controlled technologies. U.S. Citizenship is required. Are you a U.S. Citizen?
• Describe your experience designing, optimizing, and troubleshooting SQL Server and/or PostgreSQL databases. Include examples of performance tuning, indexing, or query optimization work you have performed.
• How many years of professional experience do you have developing backend applications using C# and .NET?
• Describe the largest backend application, API platform, or distributed system you have worked on. What was your role and what technologies were used?
• What experience do you have with message queues, event-driven architectures, or distributed systems? Please include technologies such as RabbitMQ, Kafka, Azure Service Bus, or similar platforms.
• Describe a significant production issue or outage you helped resolve. What was the root cause, and what actions did you take to restore service and prevent recurrence?
• What experience do you have building and supporting backend applications in Azure, Docker, or cloud-hosted production environments?

Pulled from the full job description

• Health insurance
• Paid time off
• Vision insurance
• Dental insurance, * Dental insurance
• Health insurance
• Paid time off
• Vision insurance