Senior .NET Developer - Cloud-Native & Modernization

ARETUM Holdings LLC; Bethesda (MD); Remote; USD 120,000 - 150,000; Full time

Benefits offered by this job

Health Care Plan

Retirement Plan

Life Insurance

Paid Time Off

Family Leave

Short/Long Disability

Training & Development

Job summary

ARETUM Holdings LLC is seeking a Senior Developer to advance Microsoft-based solutions, modernize legacy systems, and guide migration to cloud-native architectures. You will design, develop, and maintain applications for federal contracting clients, ensuring high-quality delivery and operational efficiency.

The role requires collaboration across cross-functional teams in an Agile setting, with emphasis on security, governance, and accessibility standards, and occasional travel in support of

Qualifications

• 7+ years of demonstrated experience with C#, ASP.NET, and .NET development.
• 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.

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.

Skills

C#

ASP.NET

RESTful services

JavaScript

Angular

Azure

Docker

Kubernetes

Entity Framework

Communication

Agile/Scrum

Problem solving

Education

Bachelor's Degree

Tools

Azure DevOps

Git

Visual Studio

Entity Framework Core

Job description

ARETUM Holdings LLC is seeking a Senior Developer to advance Microsoft-based solutions, modernize legacy systems, and guide migration to cloud-native architectures. You will design, develop, and maintain applications for federal contracting clients, ensuring high-quality delivery and operational efficiency.

The role requires collaboration across cross-functional teams in an Agile setting, with emphasis on security, governance, and accessibility standards, and occasional travel in support of