Sr. .Net Developer II

Eliassen Group; Reston (VA); Hybrid; Confidential; Full time

Job summary

Eliassen Group seeks a Sr. .NET Developer II to act as a senior full-stack engineer and technical lead, building enterprise apps with .NET and React. Lead architecture, tooling decisions, CI/CD, and best practices while mentoring developers and collaborating with stakeholders.

The role requires a US Secret clearance, is hybrid with Reston, VA 2–3 days onsite, and offers a competitive salary and benefits. W2 employment is required.

Qualifications

• Bachelor's degree in Computer Science, Information Technology, or related field, or equivalent experience.
• Active Secret clearance and local to the DMV area with onsite requirements in Washington, DC.
• 8+ years of progressive .NET development experience 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 judgement 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.

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.

Skills

C#

ASP.NET MVC

ASP.NET Core

React

Node.js

Power Platform

Power Apps

Power Automate

Power BI

Entity Framework

RESTful API

SQL Server

Git

CI/CD

Code reviews

Active Directory

Education

Bachelor's degree in Computer Science or related field

Tools

GitHub Copilot

OpenAI Codex

Job description

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.