RETR: Senior Software Engineer

Headquarters: Remote
URL: https://retr.app/

Why this role matters right now

As a product-led company, engineering is directly connected to company growth. We're looking for someone who takes ownership, moves with urgency, helps teammates succeed, and chooses the right thing over the easy thing. If you're energized by solving hard problems, shipping great software, and creating real value for customers with an outsized impact on both the product and the business, you'll fit in well here.

This is the third engineering hire on a small team. What you build ships. What you own affects revenue that same month, not the fiscal year.

What you'll do

• 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

What we're looking for

• 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 developmen…