Sr. .Net Developer II

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

• 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.

• 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.

Bachelor's degree in Computer Science, Information Technology, or related field, or equivalent experience.

Recruitment Transparency Notice

Eliassen Group values transparency in our recruitment practices. Please be advised that Eliassen Group utilizes artificial intelligence (AI) tools as part of its initial application screening  and hiring process. You may receive email and SMS notifications from the Eliassen Virtual Recruiting Team ( View email address on careers.eliassen.com , Show phone number) inviting you to complete a brief voice screening as part of your application process. These tools assist our hiring teams in different ways, including but not limited to, assistance in reviewing application materials to help identify candidates whose qualifications most closely match the requirements of the position. All AI-assisted evaluations and responses are reviewed by human recruiters before any hiring decisions are made. The use of AI in our process is intended to support fairness, efficiency, and consistency, and Eliassen Group takes measures to prevent bias or discrimination in connection with its hiring practices. By proceeding, you acknowledge, agree, and consent to Eliassen Group’s use of these tools, including AI tools, as part of the application and hiring process.

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.

· 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  View email address on careers.eliassen.com .

About Eliassen Group:

Eliassen Group is a strategic consulting firm that helps organizations reach further and achieve more through our technology, business advisory, and life sciences solutions. For nearly 40 years, we have combined exceptional people, deep domain expertise, and intelligent capabilities to expand our clients’ capacity and accelerate meaningful outcomes. We are driven by a purpose to positively impact the lives of our employees, clients, consultants, and the communities we serve.

Eliassen is committed to building a diverse and inclusive team from a variety of backgrounds, perspectives, and skills. We are an Equal Opportunity and Affirmative Action Employer and all employment decisions are based on merit, performance, and business needs. Eliassen does not discriminate on the basis of race, color, gender identity or expression, sexual preference or orientation, sex (including pregnancy, childbirth, and related medical conditions), marital status, creed, religion, physical or mental disability, genetic information, military or veteran status, age, ancestry, national origin, citizenship status, prohibited criminal record inquiries of applicants and employees, or any other category protected by federal, state, or local laws.

Don’t miss out on our referral program! If we hire a candidate that you refer us to then you can be eligible for a $1,000 referral check!