Senior .NET Full Stack Developer

Virstack LLC.; Irvine (CA); Hybrid; USD 110,000 - 170,000; Part time

Benefits offered by this job

Flexible work

Architecture influence

Growth opportunities

Job summary

Virstack LLC is seeking a Senior .NET Full Stack Developer to design, build, and modernize applications using ASP.NET, MVC, C#, and VB.NET. You will work on backend services and APIs, collaborate with client teams, and deploy in AWS.

This role supports a remote US-based work setup with flexible engagement options. Ideal candidates have 6+ years of .NET experience, strong cloud and database skills, and a proven track record with legacy and modern systems.

Qualifications

• 6+ years of professional experience as a .NET Developer or Software Engineer.
• Strong experience with ASP.NET, MVC, C#, VB / VB.NET, Visual Studio 2019/2022.
• Experience with AWS Cloud (EC2, RDS) and relational databases.
• Proven ability to work with both legacy systems and new codebases.
• Experience using GitHub for version control and collaboration.
• Ability to work independently in a remote environment while collaborating via JIRA and Slack.

Responsibilities

• Design, develop, and maintain applications on ASP.NET, MVC, C#, VB, VB.NET and .NET framework.
• Refactor, debug, and modernize legacy codebases.
• Build and maintain backend services, APIs, and integrations.
• Collaborate with product and operations teams to deliver features.
• Deploy and manage applications in AWS environment (EC2, RDS, S3).
• Participate in code reviews, testing, and release processes.
• Ensure performance, security, and scalability of applications.
• Contribute to architectural decisions and technical direction.

Skills

.NET

ASP.NET

MVC

C#

VB.NET

AWS

Relational DB

GitHub

JIRA

Slack

Remote work

Tools

Visual Studio 2019/2022

AWS EC2/RDS/S3

GitHub

JIRA

Slack

Job description

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• Careers


• Senior .NET Full Stack Developer

About Virstack

We are a software services and product engineering company based in Irvine, California.
We serve clients across industries delivering custom software solutions and staff augmentation services. Virstack is ISO 27001 certified, HIPAA compliant, and SOC 2 in-progress.

Responsibilities

• Design, develop, and maintain applications built on ASP.NET, MVC, C#, VB, VB.NET, SQL, and .NET framework


• Work hands‑on with existing/legacy codebases, including refactoring, debugging, and incremental modernization


• Build and maintain backend services, APIs, and integrations


• Collaborate with product and operations teams of clients to deliver reliable features


• Deploy and manage applications in AWS environment (EC2, RDS, S3)


• Participate in code reviews, testing, and release processes


• Ensure performance, security, and scalability of applications


• Contribute to technical decisions and architecture discussions

Qualifications and Requirements

• 6+ years of professional experience as a .NET Developer or Software Engineer


• Strong experience with:
  
  
  
  • ASP.NET
  
  
  • MVC
  
  
  • C#
  
  
  • VB / VB.NET
  
  
  • Visual Studio 2019 and 2022
  
  
  
  


• Proven ability to work with both legacy systems and new codebases


• Experience with AWS Cloud, including EC2 and RDS


• Solid understanding of relational databases and backend development


• Experience using GitHub for version control and collaboration


• Able to work independently in a remote environment while collaborating effectively with a team through JIRA and Slack.


• Strong problem-solving and communication skills

Nice to Have

• Full‑stack experience (frontend + backend)


• Experience modernizing legacy applications


• Familiarity with RESTful APIs and microservices


• Prior experience in startup or fast‑paced environments

Work Details

• Location: Remote (US‑based)


• Employment Type: Part‑Time or Full‑Time


• Engagement: Contract with potential conversion to W2


• Start: ASAP

Why Join Virstack

• Work on real production systems with meaningful impact


• Flexible work arrangements


• Opportunity to influence architecture and technical direction


• Fast‑moving team with room for growth