Aretum · 21 hours ago
Senior .NET Developer / Architect - Contingent
Washington, DC
Full-time
Onsite
Senior Level, Lead/Staff
8+ years expAretum is a mission-driven organization committed to delivering innovative, technology-enabled solutions to customers across defense, civilian, and homeland security sectors. The Senior .NET Developer / Architect will lead the design, development, modernization, and technical sustainment of a mission-critical federal information system, ensuring compliance with technical requirements and federal security policies.
ConsultingInformation Technology
No H1B
Security Clearance RequiredU.S. Citizen Only
Responsibilities
Leading the design and development of .NET-based application components supporting an enterprise federal information system and its sub-applications
Translating business and customer requirements into technical designs and system architectures
Supporting and modernizing Online Transaction Processing (OLTP) system components, reporting functions, and invoicing/payment functionalities
Implementing and supporting application enhancements across continuous integration, test, and production environments
Supporting data migration activities, including unifying application and database development frameworks and migrating development, test, and production environments
Designing and implementing application integrations, including scheduling functionality and system-to-system data exchanges
Ensuring all software modifications are documented and coordinated in accordance with configuration management, version control, and change control standards
Participating in Change Control Board (CCB) activities and supporting the technical analysis of approved change requests, including providing level-of-effort (LOE) estimates
Performing and supporting software testing activities, including unit testing, integration testing, regression testing, and production release validation
Ensuring all software promoted to production is fully tested and vetted prior to deployment
Ensuring that developed applications comply with Section 508 accessibility requirements
Maintaining software documentation, including source code documentation, user guides, and technical design artifacts
Supporting the development of Software Design Documents (SDDs), System Requirements Specifications (SRS), and traceability matrices
Providing technical input into application architecture decisions, development standards, and innovation initiatives
Developing technical recommendations and white papers related to system enhancements and modernization opportunities
Supporting user acceptance testing (UAT) activities in coordination with subject matter experts and program leadership
Coordinating with system administrators and database administrators to ensure application compatibility with production environments
Supporting operational maintenance activities, bug fixes, and reliability improvements for existing application components
Qualification
Required
Active Top Secret clearance
Minimum of 8 years of experience in .NET application development and enterprise system architecture
Bachelor's Degree (4 additional years of experience acceptable in lieu of a degree)
Demonstrated experience supporting mission-critical or enterprise-scale information systems within a regulated federal environment
Strong technical documentation skills and attention to detail
Ability to collaborate effectively with project managers, system administrators, database administrators, and government stakeholders
Strong analytical, problem-solving, and communication skills
Preferred
Master's degree
Experience designing and developing Online Transaction Processing (OLTP) systems or similar transactional platforms
Experience supporting full SDLC activities, including requirements analysis, coding, testing, deployment, and operational support
Working knowledge of configuration management, version control, and change control processes
Experience performing software testing, including regression testing and production release validation
Experience supporting application integration and data migration activities
Familiarity with federal information system documentation requirements, including SDDs, SRS, and traceability matrices
Knowledge of Section 508 accessibility requirements for electronic and information technology (EIT) systems
Benefits
Health Care Plan (Medical, Dental & Vision)
Retirement Plan (401k)
Life Insurance (Basic, Voluntary & AD&D)
Paid Time Off
Family Leave (Maternity, Paternity)
Short Term & Long-Term Disability
Training & Development
Company
Aretum
ARETUM is a government contracting company specializing in technology-enabled mission support services for the Department of Defense.
501-1000 employees
Funding
Current Stage
Late StageLeadership Team
Bobby Frazitta
Vice President of People
Tiffany Bailey
Executive Vice President
Recent News
Washington Technology
2025-12-13
Venture Capital
2025-12-13
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