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# Senior Software Engineer

- **Company:** RETR LLC
- **Location:** United States (Remote available)
- **Experience:** Expert
- **Salary:** $150,000.0 - $170,000.0
- **Contract:** Permanent contract
- **Skills:** ASP.NET, JavaScript (Programming Language), .NET Framework, Agile Methodology, Architectural Patterns, Microsoft Azure, Bootstrap (Software), C Sharp (Programming Language), Mobile Application Development, Code Review, Database Queries, DevOps, JQuery, Microsoft SQL Server, Model View Controller (MVC), NHibernate, Performance Tuning, Openid Connect, Webui, Security Assertion Markup Language (SAML), SignalR, Systems Integration, Twilio, .NET Core, Backend, Git, Stripe, Sendgrid, Front End Software Development, Restful APIs, Software Version Control, Key Vault
- **Published:** July 12, 2026
- **Apply:** https://arc.dev/remote-jobs/j/redirect/p41dbnspit

## About the Role

* 5+ years of professional experience with C# and .NET (Core / .NET 5+)
 * Strong understanding of RESTful API design, layered architecture patterns, and ORM frameworks (NHibernate, EF Core, or similar)
 * Solid SQL Server experience: complex queries, schema design, and performance tuning
 * Comfortable working across the stack: backend services, Razor/MVC views, and JavaScript (jQuery/Bootstrap)
 * Experience with Azure services (Blob Storage, Key Vault, SignalR) or equivalent cloud platforms
 * Strong source control practices (Git), code review, and DevOps experience
 * A creative problem solver with strong listening, logic, and critical thinking skills
 * Team player with a passion for helping others succeed and a commitment to doing the right thing

Bonus. Experience with authentication patterns (JWT, cookie auth, SAML2, OpenID Connect). Mobile app development experience.

## Description

* Design, develop, and maintain scalable ASP.NET Core applications and REST APIs across a layered (WebUI * Services * Repositories * NHibernate * SQL Server) architecture
 * Collaborate with product managers, designers, and engineers to define requirements and technical specifications
 * Lead architecture discussions and contribute to decisions on scalability, performance, and system design
 * Build and maintain background jobs with Hangfire, integrations with Stripe, Twilio, SendGrid, and Azure services
 * Troubleshoot and resolve complex technical issues in production and development environments
 * Participate in Agile development
 * Stay current on emerging technologies and evaluate their potential impact on the platform

The team

Three engineers total. You'll report to our Director of Engineering. He reports to our CTO, who is an engineer himself. That's the org.

Everyone ships. Everyone owns.

The stack

 * Backend. ASP.NET Core, C#, REST APIs, layered architecture
 * Data. SQL Server with NHibernate ORM
 * Frontend. Razor/MVC, jQuery, Bootstrap
 * Infrastructure. Azure (Blob Storage, Key Vault, SignalR), Hangfire for background jobs
 * Integrations. Stripe, Twilio, SendGrid, * Layers between you and the work. You'll report to our Director of Engineering. He reports to our CTO, who is an engineer. That's the org.


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