Sr. .Net Developer II
Reston, VA
Category: Development
Industry: Government
Reference ID: JN -082026-108411
Date Posted: 08/26/2026
Shortcut: http://careers.eliassen.com/RaW0LZ
Description:
Hybrid 2-3 days in Reston, VA
As Sr. .Net Developer II, you will serve as a senior full-stack engineer and technical lead, building and modernizing enterprise applications using .NET and React while driving architecture, development standards, tooling decisions, and engineering best practices. You will design APIs and services, integrate solutions across Microsoft 365, SharePoint, Teams, and the Power Platform, lead AI-enabled modernization initiatives, establish CI/CD processes, mentor developers, conduct design and code reviews, and collaborate with stakeholders to deliver secure, scalable, and reliable solutions.
Due to federal security clearance requirements, applicant must be a United States Citizen with an active Secret clearance. 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: $145,000 - $165,000/ yr. w2
Responsibilities:
- Serve as the trusted primary point of contact for stakeholders submitting requests, delivering a responsive, professional, and customer-first experience.
- Review and triage incoming intake requests, assessing scope, priority, complexity, and completeness, and follow up with customers to clarify objectives and gather missing information.
- Elicit, document, and translate customer business needs into clear, well-structured requirements that delivery teams can act on.
- Route requests to the appropriate solutions architects and analysts to engage the right resources for the best response, recommendation, or proposal.
- Coordinate across solutions architects, analysts, and development teams to shepherd each request from submission through proposed solution, tracking status and removing roadblocks.
- Communicate status, timelines, and proposed solutions back to customers in clear, non-technical language, managing expectations throughout the engagement lifecycle.
- Monitor intake volume, response times, and engagement metrics; identify trends, recurring needs, and opportunities to streamline the intake-to-delivery process.
- Refine and continuously improve workflow, triage criteria, and routing logic based on customer feedback and operational data.
- Maintain accurate records of customer interactions, requirements, decisions, and outcomes to support transparency, reporting, and program governance.
- Build and sustain strong working relationships with customers and internal delivery teams, advocating for the customer while balancing program priorities.
Experience Requirements:
- Bachelor's degree in Computer Science, Information Technology, or related field, or equivalent experience.
- Active Secret clearance and local to the DMV area with the ability to support onsite requirements in Washington, DC.
- 8+ years of progressive .NET development experience (C#, ASP.NET MVC, ASP.NET Core) with senior engineering or technical lead responsibilities.
- Proven architecture and technology selection experience for enterprise applications with the ability to articulate decisions and tradeoffs.
- Proficiency in React including hooks, component design, state management, and responsive UI development.
- Experience developing server-side applications or APIs with Node.js.
- Professional use of AI-powered developer tools such as GitHub Copilot, OpenAI Codex, or similar assistants.
- Hands-on experience with Microsoft Power Platform including Power Apps, Power Automate, and Power BI, with sound judgment on low-code suitability.
- Working knowledge of Microsoft Dataverse including data modeling, table configuration, relationships, and security roles.
- Experience supporting or modernizing SharePoint-backed systems across SharePoint Online and SharePoint 2013 or newer.
- Deep experience with MS SQL, Entity Framework, and RESTful API design and consumption.
- Experience establishing or maturing CI/CD pipelines and deployment workflows with strong Git fundamentals.
- Experience leading code reviews, setting coding standards, and mentoring developers.
- Strong understanding of application security concepts, Active Directory, and identity and access patterns in enterprise environments.
- Familiarity with Microsoft 365 and Office including SharePoint Online, Teams, Outlook, Excel, Word, and OneDrive.
- Excellent communication skills with the ability to present technical recommendations to engineering teams and non-technical stakeholders.
- Ability to work onsite in a federal environment, including occasional Saturday hours for deployment activities.
Education Requirements:
Bachelor's degree in Computer Science, Information Technology, or related field, or equivalent experience.
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 contact fraud@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