Senior Software Developer

Senior Software Developer

DMI, LLC is seeking a Senior Software Developer to join us. The Senior Software Developer designs, develops, and maintains enterprise software applications across NTSB's Microsoft-centric, Azure-hosted environment, contributing independently across the full development lifecycle.

Duties and Responsibilities:

• Design and develop ASP.NET Core web APIs and web-component-based user interfaces using .NET Core MVC frameworks in C#
• Build and maintain enterprise applications including full-stack .NET solutions using JavaScript, JSON, HTML5, and CSS
• Design and manage databases in MS SQL Server, including schema design, query optimization, and performance tuning
• Integrate applications with Azure infrastructure components, Azure DevOps pipelines, and SAML/OKTA authentication services
• Support and maintain existing production applications built on frameworks including Google Polymer, React JS, Quartz.NET, jQuery, and Bootstrap
• Participate in code reviews, establish development standards, and guide junior developers
• Develop and maintain applications in Microsoft Azure DevOps, following CI/CD best practices
• Collaborate with database administrators, system administrators, and program managers to deliver integrated solutions
• Produce technical documentation, including design specifications and API documentation

Qualifications:

• BS. or M.A. in Computer Science, Software Engineering, Information Technology, or a related field, with at least 10 years of software development experience, including 3 years in an agile environment
• Proficiency in ASP.NET Core,.NET Core MVC, C#, MS SQL Server, and web technologies including HTML5, CSS, JavaScript, and JSON
• Familiarity with Azure-hosted application environments and Microsoft Azure DevOps

Background Requirements: Must possess or be eligible to obtain and successfully complete a Public Trust background investigation and/or a Public Trust clearance.

Citizenship Status Required: Must be a U.S. Citizen

Physical Requirements: None required for this position.

Location:

490 L'Enfant Plaza, SW Washington, District of Columbia 20594

Working at DMI:

DMI is a diverse, prosperous, and rewarding place to work. Our culture is shaped by five core values that guide how we work, grow, and succeed together:

• Do What's Right – We lead with honesty and integrity.
• Own the Outcome – We take responsibility and deliver.
• Deliver for Our Customers – We are relentless about delivering value.
• Think Bold, Act Smart – We innovate with purpose.
• Win Together – We collaborate and celebrate our success.

These values aren't just ideals—they show up in how we support every part of your well-being:

• Convenience/Concierge – Virtual health visits, commuter perks, pet insurance, and entertainment discounts that make life easier.
• Development – Annual performance reviews, tuition assistance, and internal career growth opportunities to help you thrive.
• Financial – Generous 401(k) matches, life and disability insurance, and financial wellness tools to support your future.
• Recognition – Annual awards, service anniversaries, referral bonuses, and peer-to-peer shoutouts that spotlight your achievements.
• Wellness – Healthcare coverage, wellness programs, flu shots, and biometric screenings to support your health.

DMI values employees for their talents and contributions, and we take pride in helping our customers achieve their goals. Because when we live our values, we all win together.

************** No Agencies Please *****************

Applicants selected may be subject to a government security investigation and must meet eligibility requirements for access to classified information. US citizenship may be required for some positions.