Full-Stack Developer (.Net Developer

HSP Direct, based in Ashburn, VA, is a leading full-service direct mail fundraising agency. We provide direct mail and online fundraising, audience cultivation, production services, graphic design, and list and data services through our affiliated companies. Driven by data and conservative values, we proudly serve over 100 non-profit and political clients. We’re seeking highly motivated team members to join us on the cutting edge of data and fundraising.

The Full-Stack Developer (.NET Developer+) will play a key role in designing, developing, deploying, managing, and maintaining enterprise-grade applications that support HSP’s business operations and data-driven fundraising systems. This role collaborates closely with Developers, Data Analysts, and Operations teams to create efficient, scalable, and reliable software solutions. The ideal candidate possesses strong experience with C#/.NET, modern JavaScript frameworks, and cloud-native technologies, with a focus on building maintainable systems that deliver measurable business value.

This is a full-time, in-office position located in Ashburn, VA. Remote work is not an option.

• Collaborate with Developers, Data Analysts, and Operations to define functional requirements and translate them into technical specifications.
• Design, develop, test, and deploy applications using modern software engineering practices.
• Perform technical analysis, design, and implementation of business-critical applications using Microsoft .NET technologies
• Participate in Agile/Scrum processes, providing input on requirements, estimates, and architecture.
• Develop and maintain RESTful APIs, web applications, and integration services.
• Provide ongoing technical support and maintenance for enterprise applications.
• Implement and promote clean architecture, design, and secure coding standards.
• Utilize cloud-native technologies (Azure) for scalable, efficient deployments.
• Manage and deliver multiple concurrent projects while ensuring quality and adherence to best practices.

• Bachelor’s degree in computer science, software engineering, or related STEM field.
• 3–5 years of relevant full-stack development experience.
• Strong proficiency in C# and .NET, including the latest .NET frameworks (.NET Core and above).
• Proven experience in enterprise software development using Microsoft technologies.
• Working knowledge of Agile Scrum methodology, software design patterns, and clean architecture.
• Hands-on experience with cloud platforms such as Microsoft Azure.

• Visual Studio 2019 & 2022
• .NET 3.5–4.8+ / .NET Core, C#, and Java Script
• React
  
  JS or AngularJS
• Proficiency with Git for version control, including branching, merging, and managing code repositories in collaborative team environments
• Microsoft SQL
• Microsoft Analytics Platforms (Synapse, Fabric) and Python desired

• Experience integrating front-end and back-end systems in large-scale applications.
• Familiarity with Dev Ops practices including CI/CD pipelines and automated testing.
• Knowledge of RESTful API design, microservices, and containerization (Docker, Kubernetes).
• Experience with Entity Framework or similar ORM tools.
• Understanding of secure coding practices and performance optimization.
• Strong analytical and problem-solving skills with attention to detail.

The ideal candidate will be a proactive, collaborative problem-solver who thrives in a fast-paced, data-driven environment. You should be passionate about technology, adaptable to new challenges, and committed to delivering exceptional solutions that advance HSP’s mission.

If this challenge seems like a great fit for you and you’re seeking a promising career path, please apply with a cover letter, resume, and salary requirements.

Cover letter is required for consideration.

• Competitive salary commensurate with experience.
• Comprehensive benefits package including health, dental, and vision insurance.
• Annual staff events including field day, golf and spa outings, offsite Christmas party, and more.
• 401(k) with company match.
• Generous PTO and holidays.
• MAHA approved snacks and drinks.
• Company goal trips.
• Onsite fitness center.

In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification form upon hire. HSP Direct will not sponsor work visas.