Senior .NET Developer

Role Description

NetImpact Strategies is seeking a Senior .NET Developer to join our talented team supporting the development, modernization, and operation of a high-availability, enterprise-scale application in an AWS GovCloud environment. The ideal candidate is a highly experienced, hands-on developer who can take ownership of a complex production codebase, provide technical leadership, and work closely with technical leads, operations teams, and other stakeholders to deliver secure, scalable, resilient, and maintainable solutions.

The application is built on a cloud-native microservices architecture consisting of approximately a dozen services and processes millions of messages each month. The technology stack includes:

• .NET 10 / .NET Core
• REST APIs
• PostgreSQL on AWS RDS
• RabbitMQ
• AWS SQS
• Docker
• Kubernetes managed through Rancher
• AWS GovCloud

This is a hands-on senior development role requiring strong coding skills, technical ownership, production troubleshooting capabilities, and the ability to work across all layers of a mission-critical enterprise application.

Qualifications

• Bachelor’s degree or equivalent experience in Computer Science, Engineering, Information Technology, or a related technical discipline
• 8+ years of professional software development experience, including significant experience developing and supporting enterprise-scale production applications
• Expert-level hands-on development experience with C#, .NET Core, and modern .NET (.NET 8/9/10 or similar)
• Strong experience designing and developing RESTful APIs and microservices-based architectures
• Experience developing and operating applications in AWS, preferably AWS GovCloud
• Strong experience with Docker and Kubernetes in production environments
• Experience with Kubernetes management platforms such as Rancher
• Experience developing asynchronous, event-driven, or message-based applications using technologies such as RabbitMQ and AWS SQS
• Strong relational database development experience with PostgreSQL, including database design, query optimization, and performance troubleshooting
• Experience with AWS RDS or comparable managed relational database services
• Strong understanding of distributed systems, high-availability architectures, scalability, resiliency, and production application performance
• Experience supporting high-volume production systems and diagnosing complex issues across application, database, messaging, container, and infrastructure layers
• Demonstrated ability to take technical ownership of a substantial codebase and independently drive complex engineering efforts
• Experience performing code reviews and providing technical guidance and mentorship to other developers
• Experience with AI-assisted development and code-generation tools such as GitHub Copilot, ChatGPT, or comparable AI development technologies
• Ability to effectively use AI tools while applying strong engineering judgment to validate, secure, test, and maintain AI-generated code
• Experience with SonarQube or similar static code analysis and code-quality platforms
• Experience with Azure DevOps (ADO) repositories, source control, CI/CD pipelines, and modern DevSecOps practices
• Strong understanding of secure software development practices for enterprise and Federal environments
• Ability and willingness to provide occasional after-hours support for production releases and critical incidents
• US Citizenship required

Requirements

• Experience developing and supporting applications within AWS GovCloud
• Experience supporting high-volume, mission-critical Federal Government applications
• Experience integrating machine learning models or AI services into production application architectures
• Experience with AI agents, AI development frameworks, and advanced AI-assisted software engineering workflows
• Experience designing and troubleshooting distributed messaging architectures and asynchronous processing at scale
• Experience with application monitoring, logging, observability, and production performance management
• Experience with Infrastructure as Code and automated cloud deployment practices
• Familiarity with Federal security and compliance frameworks such as FISMA, NIST, and FedRAMP
• Experience working within Agile/Scrum and DevSecOps delivery environments
• AWS, Kubernetes, or related cloud/container certifications

Benefits

• Your health comes first – we offer comprehensive medical, dental, & vision insurance that starts the first of the month after you join the team
• Invest in your future – 401(k) Plan – Immediately vested employer contributions; no matching required
• Work hard, play hard – we offer a generous Paid Time Off (PTO) policy, one (1) additional day of paid wellness leave per calendar year, and observe ten (10) federal holidays
• Pawsitively pawesome – Pet Insurance (because our little critters are part of our families, too!)
• Invest in your education – Tuition reimbursement, internal training programs, & company-sponsored industry certifications!
• Be part of a dynamic and collaborative work environment recently ranked by The Washington Post as a Top Work Place in 2019, 2021, 2022, 2023, & 2024!
• Have fun and celebrate and give back – Team building activities, community volunteering, quarterly HQ days, wellness events, happy hours, family fun events, and more!