Sr. Software Developer II
Washington dc, DC
Category: Development
Industry: Government
Reference ID: JN -032026-105999
Date Posted: 04/15/2026
Shortcut: http://careers.eliassen.com/7V32UQ
Description:
Onsite in Washington dc, DC
The organization seeks a Sr. Software Developer II to deliver secure and reliable software for mission-critical federal systems. The role focuses on building and modernizing enterprise applications using C#, .NET, ASP.NET, and modern front-end frameworks while adhering to strict security and operational standards. The developer will troubleshoot production issues, contribute to CI/CD pipelines, and communicate decisions to stakeholders to maintain customer trust. This position requires an active Top Secret clearance with current or prior SCI access.
This is a full-time, permanent opportunity, offering a competitive salary and comprehensive benefits package. Qualified applicants must be willing and able to work on a w2 basis.
Salary: $170,000 - $220,000/ yr. w2
Responsibilities:
- Troubleshoot and resolve production issues in a timely and effective manner.
- Collaborate within a high-performing team to deliver technical solutions for mission-critical federal systems.
- Support O&M and design, develop, and modernize custom enterprise applications.
- Apply secure coding practices across all phases of development.
- Participate in code reviews and Agile ceremonies including planning, stand-ups, and retrospectives.
- Support and contribute to CI/CD pipelines and automated deployments.
- Communicate technical decisions and solutions to technical and non-technical stakeholders.
- Establish and maintain customer trust through technical expertise and professionalism.
- Use creativity and innovation to deliver solutions that meet customer and mission needs.
Experience Requirements:
- Active Top Secret clearance with current or previously held SCI access.
- 7+ years of professional software development experience building, testing, and maintaining enterprise applications in mission-critical environments.
- Expertise in C#, .NET, .NET Framework, Entity Framework, and ASP.NET including WebForms, MVC, and REST APIs.
- Front-end experience with TypeScript, JavaScript, HTML, CSS, Node.js, and Angular and/or React.
- Back-end experience with database development and administration including SQL Server and T-SQL.
- Experience with source code management tools such as Azure DevOps, GitLab, or GitHub, CI/CD pipelines, and containerization using Docker.
- Strong understanding of Windows Server, PowerShell scripting, IIS hosting, Kerberos, and OIDC authentication.
- Ability to contribute immediately with minimal ramp-up in a dynamic, mission-critical environment.
Education Requirements:
- Bachelor’s degree in Computer Science or Software Engineering preferred.
- Certification meeting DoD 8140 such as Security+.
- Azure Developer Associate certification or AWS Developer Associate certification, or recent and relevant software development certification.
Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range.
W2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre-tax accounts, other voluntary benefits including life and disability insurance, 401(k) with match, and sick time if required by law in the worked-in state/locality.
If anyone reaches out to you about an open position connected with Eliassen Group, please ensure that you are working directly with us by confirming the following:
· When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.
· Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group.
If you have any indication of fraudulent activity, please contact fraud@eliassen.com.
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Eliassen Group is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status. Eliassen Group’s Affirmative Action Plan (AAP) is available for inspection by any employee or applicant for employment upon request, during normal business hours of Monday through Friday, 8:30am to 5:30pm EST. Interested persons should contact Phaedra Wells at pwells@eliassen.com for assistance. It is unlawful in Massachusetts and Maryland to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Applicants with disabilities that believe they require an accommodation or assistance with a position, please email our HR team at hradmin@eliassen.com. This email inbox is designed exclusively to assist job seekers whose disability prevents them from being able to apply online. Emails sent for other purposes will not receive a response.
Please be advised that a number of fraudulent job postings have been released under the Eliassen Group brand.
Unfortunately, fraudulent job postings can happen. If anyone reaches out to you about an open position connected with Eliassen Group, never provide personal or financial information to anyone who is not clearly associated with Eliassen Group
If anyone seemingly from Eliassen Group has ever requested this personal information in the past or does so in the future, please contactInfoSec@eliassen.com.
Please ensure that you are working directly with us by confirming the following:
- When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.
- Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group, as indicated above