Sr. .NET Developer

Aretum, Llc

McLean, Northern (VA, KY)

Hybrid

USD 120,000 - 150,000

Full time

4 days ago

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Benefits offered by this job

Health Care Plan (Medical, Dental &amp

401k Retirement Plan

Life Insurance (Basic, Voluntary & AD&

Paid Time Off

Family Leave (Maternity, Paternity)

Disability (Short Term & Long Term)

Training & Development

Job summary

Aretum is seeking a Senior Developer in the Microsoft ecosystem to modernize legacy applications and design cloud-native solutions. You will work in cross-functional teams, focusing on Web API, EF Core, and Azure services, while ensuring security and governance standards. This remote role may require occasional travel; U.S.

work eligibility and clearances apply. The ideal candidate has 7+ years in C#, ASP.NET, and .NET, with hands-on RESTful services, Angular, and DevOps experience.

Qualifications

7+ years of demonstrated experience with C#, ASP.NET, and .NET development.
Experience refactoring and migrating .NET Framework applications to .NET Core, including ASP.NET, ASP.NET Core
5+ years of experience building and maintaining RESTful services and WCF
4+ years of experience with JavaScript and Angular v16 or higher
Solid experience with Entity Framework and Entity Framework Core
Experience with Azure Cloud
Experience with Visual Studio Ultimate 2017/2019/+, Azure DevOps, and Git
Containerization experience on Windows servers with Docker and Kubernetes
Solid knowledge of Scrum Agile development methodology
Excellent written/verbal communication skills

Responsibilities

Work cross-functional in an Agile environment to develop cloud-native applications using .NET, Angular, and Azure Services
Collaborate with Project Manager to support emerging client needs
Ensure alignment with enterprise security, governance, and accessibility standards
Maintain and modernize legacy applications and migrate to .NET Core
Refactor and migrate .NET Framework apps to modern .NET stack

Skills

C#/.NET

ASP.NET

RESTful services

Angular

Azure

Docker

Kubernetes

Entity Framework Core

JavaScript

Azure DevOps

Git

Visual Studio

Education

Bachelor's Degree or equivalent experience

Microsoft Certified Professional / Azure Certification

Tools

Git

Azure DevOps

Visual Studio

Job description

Public Trust Eligibility Required

About Aretum

Aretum is a mission-driven organization committed to delivering innovative, technology-enabled solutions to our customers across defense, civilian, and homeland security sectors. Our teams work at the intersection of strategy, technology, and transformation, helping agencies solve their most critical challenges. We believe in investing in our people and creating a culture where collaboration, inclusion, and professional growth are at the forefront.

Job Summary

Aretum is seeking a skilled Senior Developer in the Microsoft ecosystem, particularly with knowledge of .NET solutions, to join our team in creating dynamic and innovative solutions for our clients. The ideal candidate will play a key role in modernizing legacy applications, guiding migration strategies, and designing cloud-native solutions.You will work in cross-functional teams providing software development activities in support of maintenance and enhancement of existing systems. You will be responsible for designing, developing, and maintaining applications and systems for our clients. Your expertise will ensure that we deliver high-quality development solutions to enhance our clients’ operational efficiency and technological advancement.

Due to the nature of our work as a federal consulting organization, employees may be expected to handle Controlled Unclassified Information (CUI) and must adhere to applicable safeguarding and compliance requirements.

Responsibilities

Work cross-functionally in an Agile environment to develop cloud-native applications using .NET 10, Angular 20+, and Azure Services with a focus on Web API and Entity Framework Core
Must be flexible, able to work in a highly collaborative environment, juggle multiple tasks at once, and work independently and collaboratively as needed
Utilize superior interpersonal skills and strong communication skills
Be comfortable working directly with the Project Manager to support emerging client needs
Ensure alignment with enterprise security, governance, and accessibility standards
7+ years of demonstrated experience with C#, ASP.NET, and .NET development
Bachelor's Degree (5 additional years of experience are acceptable in lieu of a degree)
Microsoft Certified Professional and/or Azure Certification
Experience refactoring and migrating .NET Framework applications to .NET Core, including ASP.NET, ASP.NET Core
5+ years of experience building and maintaining RESTful services and WCF
4+ years of experience with JavaScript and Angular v16 or higher
Solid experience with Entity Framework and Entity Framework Core
Experience with Azure Cloud
Experience with Visual Studio Ultimate 2017/2019/+, Azure DevOps, and Git
Containerization experience on Windows servers with Docker and Kubernetes
Solid knowledge of Scrum Agile development methodology
Excellent written/verbal communication skills

Travel Requirements

This is a remote position; however, occasional travel may be required based on project needs, client meetings, team collaboration events, or training sessions. Travel is expected to be less than 10% and will be communicated in advance whenever possible.

EEO Statement

Aretum is committed to fostering a workplace rooted in excellence, integrity, and equal opportunity for all. We adhere to merit-based hiring practices, ensuring that all employment decisions are made based on qualifications, skills, and ability to perform the job, without preference or consideration of factors unrelated to job performance.

As an Equal Opportunity Employer, Aretum complies with all applicable federal, state, and local employment laws.

We are proud to support our nation’s veterans and military families, providing career opportunities that honor their service and experience.

If you require reasonable accommodation during the hiring process due to a disability, please contact hr@aretum.com for assistance.

Equal Opportunity Employer/Veterans/Disabled

U.S. Work Authorization

Applicants must be U.S. citizens or currently authorized to work in the United States on a full-time basis. This position supports a federal government contract and requires the ability to obtain and maintain a Public Trust or Suitability Determination, depending on the agency’s background investigation requirements. Sponsorship is not available.

Salary Range: $120,000–$150,000 annually. Final compensation will be determined based on factors including education, experience, qualifications, skills, and applicable contract requirements.