Senior .NET Full Stack Developer with Security Clearance

Senior Software Engineer (Enterprise Applications)
Location: Washington, DC (100% On-Site)
Clearance: Active Top Secret required Overview
We are seeking a Senior Software Engineer to support the development and sustainment of enterprise-level applications in a highly secure federal environment. This role is responsible for contributing to large-scale software initiatives that support mission-critical operations, including data-intensive systems and advanced analytical capabilities.
The ideal candidate brings strong experience delivering robust applications in complex environments, with the ability to contribute across the full software development lifecycle and collaborate effectively within a structured engineering team.

Key Responsibilities Design, develop, test, and support enterprise application components within a secure IT environment
Enhance and maintain existing systems by modifying code and implementing new capabilities
Integrate third-party tools, libraries, and services into custom applications
Contribute to development efforts involving large-scale data processing and analytics-driven applications
Participate in full SDLC activities, including planning, requirements analysis, development, testing, and quality assurance
Support application deployment processes and ensure solutions meet performance, scalability, and reliability requirements
Recommend and implement process improvements and automation strategies for system operations and maintenance
Collaborate with technical leadership and architecture teams to align development with systems design and engineering standards
Participate in code reviews, design discussions, and milestone evaluations
Contribute to knowledge sharing and support development best practices across the team Required Qualifications Active Top Secret clearance
Bachelor’s degree in Information Technology, Computer Science, or related field, OR equivalent experience
8+ years of experience in software development and application engineering
Strong understanding of application design, development, testing, and deployment practices
Experience integrating external components and services into enterprise applications
Proven ability to enhance and maintain existing codebases in large environments
Experience supporting or building data-intensive or analytics-focused applications
Strong knowledge of the software development lifecycle (SDLC)
Excellent problem-solving, analytical, and troubleshooting skills
Strong communication and collaboration abilities within cross-functional teams

Preferred Qualifications Experience working within structured development environments under technical or architectural leadership
Familiarity with code review processes, architecture discussions, and development governance
Experience with resource estimation, development planning, and delivery coordination
Ability to mentor junior developers and contribute to team knowledge transfer and growth What Makes a Strong Candidate Experience delivering large-scale, enterprise-grade applications from development through deployment
Strong ability to balance technical execution with process improvement and system optimization
Comfortable working in high-security, compliance-driven environments
Ability to contribute to both hands-on development and strategic engineering discussions