Senior Full-Stack Developer (.NET/Drupal)

LightFeather is seeking a Senior Full-Stack Developer who will lead the development, maintenance, and enhancement of critical web applications and APIs for a federal agency's national registry operations. This role requires expertise in .NET development, Drupal CMS, and API integration, as well as the ability to ensure Section 508 compliance and support mission-critical government web services.

This role provides the opportunity to work on high-impact web applications and APIs that serve the federal financial sector, ensuring secure, accessible, and scalable application solutions.

• Location: Remote with preference for Silver Spring, MD area candidates


• Job Type: Full Time


• Citizenship: U.S. Citizenship Required


• Clearance Requirement: Public Trust or higher preferred

Key Responsibilities

• Develop and maintain .NET applications using C# and .NET Framework 4.8 for registry and financial operations.


• Maintain and upgrade Drupal CMS, including potential re-platforming to Drupal 12.1.


• Maintain and enhance SOAP and REST APIs supporting state agency integrations and public registry access.


• Ensure Section 508 compliance across all web applications and implement accessibility best practices.


• Implement and maintain Login.gov integration with existing SQL authentication systems.


• Design and develop custom software solutions for registry data processing and financial tracking operations.


• Create and maintain API documentation, technical specifications, and development project plans.


• Apply secure coding practices and coordinate application security reviews with federal partners.


• Monitor and optimize application performance, troubleshoot issues, and implement enhancements.

Required Qualifications

• U.S. Citizenship required.


• Public Trust clearance or ability to obtain.


• Minimum 5+ years of experience in full-stack development with strong focus on .NET and web technologies.


• Expert-level proficiency in C#, .NET Framework 4.8, PHP, JavaScript, and SQL.


• Strong experience with Drupal CMS, IIS configuration, HTML5, CSS3, and responsive web design.


• Proven experience with SOAP and REST API development, documentation, and integration.


• Understanding of Section 508 accessibility standards and federal web compliance requirements.

Preferred Skills

• Experience working with federal agencies or government web application projects.


• Knowledge of AWS services, Redis, and cloud-based application deployment.


• Familiarity with Python scripting and automation tools.


• Experience with MS Access integration and macro development.

Why Join LightFeather?

At LightFeather, you're not just taking a job—you're joining a purpose-driven team that delivers innovative, mission-critical solutions to make a real difference. You'll work on diverse, meaningful projects that challenge and inspire you, alongside some of the best minds in the industry.