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.